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Journal articles on the topic 'Vicker Hardness'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Showket, Hussain Dar, and Arashdeep Singh Er. "Microhardness of Silicon Nitride Ceramic and Its Composites." International Journal of Trend in Scientific Research and Development 4, no. 1 (2019): 660–64. https://doi.org/10.5281/zenodo.3606152.

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Micro hardness research studies on various non oxide ceramics will be carried out. These ceramics include silicon nitride and the composites of silicon nitride. Micro hardness measurement of these ceramics i.e. vicker will be carried out using diamond indenters. Various influences of load and time of indentation on hardness values of these ceramics will be carried out in detail. Fracture toughness of these ceramics was also studied using vicker indentation. The vicker hardness of these ceramics decreases with increasing load, similar influence was observed by increasing time of indentation. Sh

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Zhou, L., Yong Ze Guo, Z. R. Liao, X. R. Liang, and G. Q. Pan. "Calculation of Indentation Hardness Based on Indentation Energy." Advanced Materials Research 188 (March 2011): 356–59. http://dx.doi.org/10.4028/www.scientific.net/amr.188.356.

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Comparing advantages and disadvantages of Oliver-Pharr method, microhardness method and indentation energy method, this article propses the improvement of indentation energy method. The improvement of indentation energy method mainly takes the calculation of energy and pile-up and sink-in phenomenon into account. Using Abaqus to simulate the indentation of aluminum with Vicker indenter, process and analyse data from simulation . By comparing different methods of hardness calculation , analyse the effect of improvement of hardness calculation.

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Math, Praveen, and B. S. Praveen Kumar. "A Study on Optimization of CO<sub>2</sub> Welding Process Parameters on Structural Steel by Using Taguchi Method." Key Engineering Materials 937 (December 22, 2022): 3–11. http://dx.doi.org/10.4028/p-nu31ai.

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The goal of this study is to improve several welding parameters that affect the mechanical properties of mild steel, including YS, UTS, toughness, and Vicker hardness (VHN). The welding parameters were optimized using the Taguchi technique, and fracture mode characterization was investigated. There have been numerous experiments done. Applying for it was the L9 orthogonal array (3xx3). To find out how different welding factors, including wire feed speed, welding current, and gas flow rate, affect mechanical qualities, statistical methods of signal to noise ratio (SNR) and analysis of variance

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Phuong, Doan Dinh, Tran Bao Trung, Le Danh Chung, and Tran Ba Hung. "EFFECT OF BINDER COMPOSITION AND SINTERING TEMPERATURE ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF WC-7(Ni,Fe) HARD ALLOYS PREPARED BY FREE CAPSULE HIP TECHNIQUE." Acta Metallurgica Slovaca 25, no. 2 (2019): 123. http://dx.doi.org/10.12776/ams.v25i2.1270.

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<p class="AMSmaintext">In this research, WC-7(Ni,Fe) hard alloys were prepared by ball milling, cold compaction and finally consolidated by hot isostatic pressing. The effect of binder composition and sintering temperature were investigated in term of the microstructure, density and mechanical properties of sintered samples. Density of hard alloys was measured by the Archimedes' principle while the microstructure was observed using a scanning electron microscope. The Vickers hardness was investigated at load of 30KG and the fracture toughness was calculated based on the Palmqvist crack m

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Ramadhani, Dina Kharina, Hidayati Hidayati, and Didin Kustantiningtyastuti. "Pengaruh Perendaman Gigi Dengan Teh Hijau (Camellia Sinensis) Terhadap Kekerasan Gigi Setelah Direndam Dengan Minuman Bersoda." Andalas Dental Journal 9, no. 2 (2021): 67–71. http://dx.doi.org/10.25077/adj.v9i2.176.

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Tooth erosion is the loss of important dental structure minerals due to continuous acid exposure, due to the low pH and high calories found in soft drinks. Loss of mineral elements in tooth enamel reversible or can still return to normal through the process of remineralization. Adding fluorine, calcium, phosphorus from green tea can increase resistance from remineralization of email toward acids, in other words it can inhibit acid formation by binding to enamel minerals and forming fluorapatite compounds. Objective: To determine the increase of tooth hardness enamel after being soaked with gre

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Chansimuang, Nuansiri, and Tosawat Seetawan. "Preparation of Thin Cu Electrode on Al₂O₃ + Clay Substrate by Pulsed DC Magnetron Sputtering." Advanced Materials Research 770 (September 2013): 335–38. http://dx.doi.org/10.4028/www.scientific.net/amr.770.335.

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Aluminum oxide (Al2O3) and Copper (Cu) are popular into insulator and electrode for thermoelectric module. The Al2O3 + clay substrate was prepared by solid state reaction and the thin Cu electrode prepared by pulsed DC magnetron sputtering. Crystal structure and microstructure of the substrate were measured by using the X-ray diffraction and scanning electron microscopy techniques. The Vicker hardness and density were measured by Micro Hardness tester and Archimedes method, respectively. The X-ray diffraction patterns of the substrate were obtained mix phases such as Al2O3, clay and Cu phases.

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Perez, Carlos Ariel Samudio, and Cezar Augusto Garbin. "Caracterização metalúrgica de ligas de Ni-Cr para metalocerimica." Revista da Faculdade de Odontologia de Porto Alegre 40, no. 1 (2021): 57–59. http://dx.doi.org/10.22456/2177-0018.111055.

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Alternative Ni-Cr alloys applied in dentistry of two commercial brands for ceramometal restoration were evaluated. The alloys were analyzed in the commercial and after casting conditions using experimental techniques of metallography, X-ray diffraction, superficial hardness and density. The metalografics and X-ray diffraction analysis showed that, the alloys microstructure is marked with the presence of a solid solution having an ordered face- centred cubic structure, Ni-rich austenitic (y phase) matrix, and with fine precipitates particles of secondary phases. The Vicker hardness tests showed

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Wang, Qiu Ying, Zhi Bo Hu, Ming Yue Zhang, Yi Lin Zhou, Jin Bo Liu, and Hui Chen. "Research on Repair Welding Processes of a Bainite Steel Frog." Advanced Materials Research 652-654 (January 2013): 2274–78. http://dx.doi.org/10.4028/www.scientific.net/amr.652-654.2274.

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This paper introduced a kind of bainite steel used for frog, and studied its repair welding processes. In this paper, four different welding processes were designed. Optical microscopy, scanning electron microscopy, vicker hardness tester, wear tester, impact tester, and high temperature abrasion tester were used to test microstructures, hardness, wear weight loss, impact absorbing energy and wear morphology. The conclusion was that when the current was 120A and the preheat temperature was 250°C the hardness of surfacing metal was the highest, the wear weight loss was least and the impact abso

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Chotěborský, R. "Effect of heat treatment on the microstructure, hardness and abrasive wear resistance of high chromium hardfacing." Research in Agricultural Engineering 59, No. 1 (2013): 23–28. http://dx.doi.org/10.17221/62/2011-rae.

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The effect of destabilization heat treatment on the microstructure, hardness, fracture toughness and abrasive wear resistance of high chromium hardfacing was investigated. The results from the study shows that the hardness, frac&shy;ture toughness and abrasive wear resistance are influenced by temperature of destabilization heat treatment and air and furnace cooling conditions, respectively. Destabilization treatment of materials by furnace cooling caused higher secondary carbides in the dendritic austenite whilst by air cooling it showed smaller particles of secondary carbide. Also, it wa

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Nugroho, Raditya, Putri Nila Kharisma, and Roedy Budirahardjo. "Pengaruh Aplikasi Gliserin pada Kekerasan Resin Komposit Nanofiller dengan Perendaman Cuka Apel." Pustaka Kesehatan 8, no. 2 (2020): 87. http://dx.doi.org/10.19184/pk.v8i2.11322.

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Composite resin is a type of filling material that is often used because it has good bonds with dentine and enamel and has a high aesthetic value. Nanofiller composite resin has high hardness, good polishing, color accuracy, and good translucency. The hardness of composite resins can change caused by low pH beverage. Purpose: To determine the differences in effect of glycerin application on hardness of nanofiller composite resins with immersion of apple cider vinegar. The type of research used was experimental laboratories with a pretest and post test group design. Samples were 24 immersion in

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Alkhudhairy, Fahad H., Yasser F. AlFawaz, and Mohammed S. Bin-Shuwaish. "Examining Vicker Hardness and Wear Volume Minimization in Composite Resin with Different Filler Dimensions via Scanning Topography." Journal of Biomaterials and Tissue Engineering 13, no. 7 (2023): 808–12. http://dx.doi.org/10.1166/jbt.2023.3317.

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Aim: To compare the surface hardness of the nanohybrid resin composite with the other filler-containing resin composites. Material and Method: Abrasive wear properties of four types of resin composites: Harmonize (HM), Tetric N-Ceram (TNC), Filtek Z250 (Z250), and Filtek Z350 (Z350). Each composite had six 10 mm-diameter, 6 mm-thick cylindrical specimens for testing. The wear test involved subjecting the specimens to 800 cycles of abrasive wear under a 17 kg load. Surface hardness and weight loss were measured using a Vickers indenter micro-hardness tester after polishing. Surface morphology i

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Noviyanti, Atiek Rostika, Hendri Setiawan, Engela Evy Ernawati, Haryono, and Risdiana. "Mechanical Properties of Hydroxyapatite/La Prepared by a Solid Chemical Reaction Method." Materials Science Forum 1028 (April 2021): 352–58. http://dx.doi.org/10.4028/www.scientific.net/msf.1028.352.

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Mechanical properties of Hydroxyapatite (Ca10(PO4)6(OH)2, HA, still need to be modified to improve its function as dental filler or bone implant. HA is usually substituted with other metals to increase its mechanical strength. In this study, HA from chicken eggshells was substituted with La with a concentration variation of 1-3 wt % with a solid chemical reaction at a temperature of 1100 °C for 2 hours. The structure, morphology and mechanical strength of HA/La were characterized by XRD, SEM and Vicker Hardness, respectively. All HA samples adopt the P 63/m space group. Likewise, the IR spectr

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13

Intanon, Naphatara, Charnnarong Saikaew, Anurat Wisitsoraat, and Parinya Srisattayakul. "Improving the Mechanical Properties of a Machine Component of a Fishing-Net Weaving Machine by Duplex Coating." Advanced Materials Research 1016 (August 2014): 90–94. http://dx.doi.org/10.4028/www.scientific.net/amr.1016.90.

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In this study, the mechanical properties of a weaving machine component made of cast stainless steel are improved by the duplex coatings of electroplated hard-chrome and sputtered metal nitride layers. The effects of the first and second coat layers of three metallic nitrides, including TiN, TiN-Ni and NiN, were comparatively studied. The structural characteristics of the coating materials were studied by scanning electron microscopy, energy dispersive X-ray spectroscopy and X-ray diffraction. Vicker hardness was then measured by nanoindenter. It was found that the duplex coating surfaces give

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14

Karthikeyan, G., T. Velmurugan, V. C. Sathish Gandhi, G. Elatharasan, and S. Thulasi. "Tribological, Compressibility and Micro Hardness Behaviour of Al7075/SiC Composites." Journal of Physics: Conference Series 2925, no. 1 (2024): 012021. https://doi.org/10.1088/1742-6596/2925/1/012021.

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Abstract The Al7075 with various weight percentages such as 6%, 9%, and 12% of SiC composites were fabricated by stir casting method. The three samples are subjected to a wear test, compressive test, and microhardness test by using a spin-on disc, Universal Testing Machine (UTM), and vicker harness tester machine. From the results, Al7075 with 12% silicon carbide showed better deformation behavior low wear behavior and high hardness strength. These behaviors of more initial fraction density, and high bore presence of silicon carbide reinforcement than others perform. The stress formability ind

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15

Putri Eszy, Mety Dwi, Afriwardi Afriwardi, and Susi Susi. "PENGARUH PEMBERIAN LARUTAN SARI KURMA (PHOENIX DACTYLIFERA L.) DAN LARUTAN FLUOR TERHADAP KEKERASAN EMAIL GIGI SETELAH DIRENDAM DALAM MINUMAN RINGAN BERKARBONASI." Andalas Dental Journal 2, no. 1 (2021): 56–64. http://dx.doi.org/10.25077/adj.v2i1.112.

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Soft drink with low pH (5,5) causes tooth erosion. Erosion may result in a decrease in surface hardness of tooth enamel. This research will be used a solution of palm juice and solution of fluoride to increase the surface hardness of tooth enamel. The purpose of this study was to evaluate effect of using a solution of palm juice 100%, 75%, 50%, 25% and APF 1,23% to the surface hardness of tooth enamel. The methode used in this research is the experimental laboratory and were tested for their hardness using Vicker Hardness Tester.Measurement performed three times, initial hardness, after all sp

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Sandy, Rio, Viktor Naubnome, and Reza Setiawan. "Pengaruh Preheat, Postheat dan Kecepatan Las Proses Pengelasan Gas Metal Arc Welding (GMAW) Baja AISI 1050 terhadap Nilai Kekerasan." Jurnal Teknik Mesin 15, no. 1 (2022): 40–45. http://dx.doi.org/10.30630/jtm.15.1.776.

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The purpose of this study was to determine the effect of preheat, reheating and welding speed on AISI 1050 steel using GMAW welding with a current of 130 A, a voltage of 20 volts, the preheat temperatures used were 250 C, 300 C, 350 C and reheating temperatures of 550 C, 600 C, 650 C, welding speed using automatic tools with speed variations of 2.5 mm/s, 4.5 mm/s, this study used an experimental method including preparation of tools and materials, specimen making, welding process and micro hardness testing of Vicker hardness later obtained The highest hardness result is 206.7 HV at a preheat t

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Can Xuan, Khanh, Ba Le Xuan, An Nguyen Truong, Hung Trinh Quang, and Thanh Nguyen Trung. "An intelligence-based optimization of the internal burnishing operation for surface roughness and vicker hardness." Transport and Communications Science Journal 72, no. 4 (2021): 395–410. http://dx.doi.org/10.47869/tcsj.72.4.1.

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Boosting machining quality is a prominent solution to save production costs for burnishing operations. In this work, a machining condition-based optimization has been performed to decrease surface roughness (SR) and enhance Vickers hardness (VH) of the minimum quantity lubrication-assisted burnishing operation (MQLABO). The burnishing factors are the spindle speed (S), depth of penetration (D), and the air pressure (P). The burnishing trails of the hardened material labeled 40X have been conducted on a milling machine. The adaptive neuro-based-fuzzy inference system (ANFIS) was used to constru

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Huang, Wen, and Haichuan Chen. "First-principles investigation of the elastic and thermodynamic properties of ReC2 (Re = Ho, Nd, Pr)." Modern Physics Letters B 29, no. 01 (2015): 1450256. http://dx.doi.org/10.1142/s021798491450256x.

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The elastic and thermodynamic properties of Re C 2 (Re = Ho , Nd , Pr ) have been investigated by using the first-principles density functional theory within the generalized gradient approximation. The computed lattice constants of Re C 2 are in agreement with the experimental data. The calculated elastic constants reveal that all compounds are mechanically stable. The shear modulus, Young's modulus, Poisson's ratio σ, the ratio B/G, shear anisotropy and elastic anisotropy are also calculated. Finally, the Vicker hardness, Debye temperature, melting point and thermal conductivity have been pre

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Tista, IGN Bagus, IGAA Hartini Hartini, and IA Gitasanthi KDA. "PERENDAMAN DENGAN PERASAN BUAH JERUK LEMON (Citrus lemon) DAPAT MENURUNKAN KEKERASAN RESIN KOMPOSIT NANOHYBRID." Interdental Jurnal Kedokteran Gigi (IJKG) 16, no. 2 (2020): 49–53. http://dx.doi.org/10.46862/interdental.v16i2.1131.

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Composite resin is a restoration material that is often used because the composite resin has good aesthetic value like mimetic the teeth color. Composite resins have a physical and mechanical condition. One of the mechanical condition is hardness. The surface hardness of composite resins is the surface resistance of the composite resin material to the applied pressure. One of the factors influencing composite hardness is the food and beverages consumed. Consuming acidic drinks continuously for a long time period can erode composite resin filling. The purpose of this study was to determine the

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Anggraini, Lydia, Asep Suhandi, and Rudi Rachmat. "Microstructure and Mechanical Properties of Copper-Iron Fabricated by Mechanical Milling and Continuous Sintering." Solid State Phenomena 295 (August 2019): 37–42. http://dx.doi.org/10.4028/www.scientific.net/ssp.295.37.

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This research is to analyze the effect of mechanical milling on the microstructure and mechanical properties of copper-iron. The sample is fabricated by compacting, milling and sintering processes. Sintering process is carried out using continuous type machine with conveyor belt mesh and the furnace type is muffle. After that, it is cooled with natural water jacket process. Vicker hardness testing and tensile strength test is performed to determine the mechanical properties of copper-iron alloys that occur. The mean value of sample 1 hardness (before milling) was 39.8 HV. The mean value of sam

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Kirthika, P., N. Thangaraj, and P. Anitha. "Influence of bath temperature and deposition time on hardness and magnetisation of electrodeposited Nickel Manganese Tungsten thin films." Journal of Ovonic Research 19, no. 2 (2023): 231–38. http://dx.doi.org/10.15251/jor.2023.192.231.

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The Nickel Manganese Tungsten (Ni-Mn-W) thin films were prepared at different temperature and time of deposition on copper substrate. The crystal structure and morphology of deposits were analysed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD revealed that the structure of Ni-Mn-W thin films with have an average grain size of about 28 nm for 45o C. The elemental analysis of Ni-Mn-W thin films were obtained by energy dispersive X-ray spectroscopy (EDAX). The magnetic properties of electrodeposited Ni-Mn-W thin films were obtained by vibrating sample magnetometer (VS

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Fitri, Atika Resti, Phoonsuk Limraksasin, Yendriwati, Filia Dana, and Nindira Yasmine Siregar. "The Application of Apple (Malus sylvestris) Extract-Based Gel: Effects on Teeth Colour Change and Hardness." Dentika: Dental Journal 27, no. 1 (2024): 6–12. http://dx.doi.org/10.32734/dentika.v27i1.15475.

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Manalagi apple extract, which contains malic acid, has the potential to be used as an alternative teeth whitening. Therefore, this study aimed to investigate the effect of Manalagi Apple (Malus sylvestris) extract-based gel on teeth colour change and hardness. It included an experimental laboratory with a pre-test, post-test, and control group design. The samples consisted of thirty anterior extracted teeth which were divided into five groups, including negative control, 10% carbamide peroxide, 25%, 50%, and 75% extract. Teeth were discoloured for seven days using a coffee solution, and gel wa

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Ozcan, Suat, Ihsan Yikilgan, Mine Betul Uctasli, Oya Bala, and Zeliha Gonca Bek Kurklu. "Comparison of time-dependent changes in the surface hardness of different composite resins." European Journal of Dentistry 07, S 01 (2013): S020—S025. http://dx.doi.org/10.4103/1305-7456.119059.

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ABSTRACT Objective: The aim of this study was to evaluate the change in surface hardness of silorane-based composite resin (Filtek Silorane) in time and compare the results with the surface hardness of two methacrylate-based resins (Filtek Supreme and Majesty Posterior). Materials and Methods: From each composite material, 18 wheel-shaped samples (5-mm diameter and 2-mm depth) were prepared. Top and bottom surface hardness of these samples was measured using a Vicker′s hardness tester. The samples were then stored at 37°C and 100% humidity. After 24 h and 7, 30 and 90 days, the top and bottom

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Kim, Ji Soon, S. H. Jung, Young Do Kim, Chung Hyo Lee, and Young Soon Kwon. "Densification and Mechanical Property of Nanostructured NiAl Produced by Mechanical-Alloying and Spark-Plasma Sintering." Materials Science Forum 449-452 (March 2004): 1101–4. http://dx.doi.org/10.4028/www.scientific.net/msf.449-452.1101.

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Mechanically-alloyed NiAl powder was sintered by Spark-Plasma Sintering (SPS) process. Densification behavior and mechanical property were determined. Above 97% relative density was obtained after sintering at 1150oC for 5min. Crystallite size determined by the Scherrer method was approximately 80 nm. TEM observation revealed a relative larger crystallite size. X-ray diffraction analysis showed that the sintered bodies were composed mainly of NiAl phase together with Ni3Al phase. Sintered NiAl body showed an average Vickers hardness of 555Hv, transverse-rupture strength of 1393MPa, 4-point-be

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Golestaneh, Amirreza Fahim, Aidy Ali, and Mehdi Bayat. "Experimental and Analytical Studies of Fatigue Crack Growth in Peened after Skimmed Friction Stir Welded Joint of 2024-T351 Al Alloy." Key Engineering Materials 462-463 (January 2011): 1212–17. http://dx.doi.org/10.4028/www.scientific.net/kem.462-463.1212.

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The present work studies the crack behavior along the surface of the friction stir welded (FSW) joint of 2024-T351 aluminum alloy. The surface engineering of shot peening and skimming are used to enhance the fracture characteristics of the joint. Then multiple crack initiation is detected within FSW zones by scanning electron microscopy, while plastic replication technique is used to monitor the crack propagation. The variation of residual stress is measured (using hole drilling technique) as well as hardness characteristic (using standard method of Vicker) to study the fatigue life of the FSW

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Tharajak, Jirasak, and Noppakun Sanpo. "The Effect of Sintering Temperature on Physical Properties of Leucite Ceramics." Applied Mechanics and Materials 891 (May 2019): 214–18. http://dx.doi.org/10.4028/www.scientific.net/amm.891.214.

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Leucite has been widely used as a constituent of dental ceramics to modify the coefficient of thermal expansion. This is most important where the ceramic is to be fused or baked onto metal. However, its physical property was unpredictable since it was sensitive to several parameters such as sintering temperature and concentration of raw materials. In this research study, leucite ceramic particles were synthesized by in-house sol-gel process. The morphology and size of our synthesized leucite particles were analyzed by SEM, vicker hardness and XRD, respectively. It was revealed that the sinteri

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Su, Dong, Xiao Yan, and Feng Hou. "Fabrication of Macroporous SiCN Ceramics from Mixed Polysilazanes." Key Engineering Materials 602-603 (March 2014): 384–87. http://dx.doi.org/10.4028/www.scientific.net/kem.602-603.384.

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Macroporous polymer-derived SiCN ceramics are fabricated directly by mixing polysilazane precursors followed with crosslinking and pyrolysis. Two kinds of polysilazanes namely polyvinylsilazane and polyhydrosilazane are mixed, crosslinked by 2, 2-Azo-bis-isobutyronitrile to form resins before pyrolyzed to form ceramics in argon flow at 1000°C. The density of the SiCN ceramic is 1.65 g/cm3 with corresponding porosity of 30 % compared to dense SiCN ceramics. SEM images show that the ceramics possess high porosity and homogeneous honeycomb-like macropores of ~2 μm. The porous SiCN exhibits good m

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Bolty, Hamdy A., Gehan Abd Elmonem El-Olimy, and Eman Elbahrawy. "Efficacy of different natural remineralizing agents on treatment of artificially induced enamel caries (An in vitro comparative study)." Tanta Dental Journal 20, no. 4 (2023): 307–18. http://dx.doi.org/10.4103/tdj.tdj_49_23.

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Objectives To evaluate and compare the remineralizing efficacy of chicken egg shell (CESP), propolis and grape seed extract (GSE) powder solutions in the treatment of artificially induced enamel caries in permanent human teeth (an in vitro study). Materials and methods Three different natural products (CESP, propolis, and GSE) were used. four groups were grouped according to the type of treatment for each group (n = 20). Control group (n = 10) (group B remineralized by CESP solution, group C remineralized by propolis powder solution and group D remineralized by GSP solution). Each group was di

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Ismail, Roslina, Fuaida Harun, Azman Jalar, and Shahrum Abdullah. "Mechanical Interlocking on Leadframe Surface for Bondability of Au Wedge Bond." Materials Science Forum 857 (May 2016): 79–82. http://dx.doi.org/10.4028/www.scientific.net/msf.857.79.

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This work is a contribution towards the understanding of wire bond integrity and reliability in relation to their microstructural and mechanical properties in semiconductor packaging.The effect of surface roughness and hardness of leadframe on the bondability of Au wedge bond still requires detail analysis. Two type of leadframes namely leadframe A and leadframe B were chosen and scanning electron microscope (SEM) and optical microscope were used to inspect the surface morphology of leadframes and the quality of created Au wedge bond after wire bonding process. It was found that there were sig

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Zhao, Qiong, Xiao Ge Zhang, Ye Fan, Guo Yi Qin, Si Yong Xu, and Jin Xin Gu. "Effect of Cold Rolling and Heat Treatment on Microstructure and Mechanical Properties of Pt-0.7Ti Microalloy." Materials Science Forum 817 (April 2015): 645–50. http://dx.doi.org/10.4028/www.scientific.net/msf.817.645.

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The effects of cold rolling, solid solution, aging and annealing treatment on Pt-0.7Ti microalloy were investigated in this study. The microstructures of Pt-0.7Ti microalloy and the precipitated ordered phase Pt8Ti were observed and analyzed by OM, TEM, XRD. The mechanical properties of the alloy were evaluated Vicker micro-hardness. The results showed that micro amount of Ti was an effective element for solid-solution strengthening of Pt, the micro-hardness of 97% deformation for ST and ST+AG samples increased to 214HVand 224HV, respectively, which almost are double that of pure Pt. Micro-amo

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Aramide, Basiru, Patricia Popoola, Rotimi Sadiku, Tamba Jamiru, and Sisa Pityana. "Influence of extra chromium addition on the microstructure, hardness, and corrosion behaviour of high carbon ferrochrome FeCrV15 deposited through laser cladding on steel baseplate for tillage application." Surface Topography: Metrology and Properties 9, no. 4 (2021): 045029. http://dx.doi.org/10.1088/2051-672x/ac314f.

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Abstract Laser cladding is an additive manufacturing technology utilised in surface strengthening, modification, and repair of components subjected to adverse working conditions, such as tillage tools, which is accomplished by adding functionally graded material with a remarkable limit to enhancing an engaged credited property of monolithic material that is superior and better than its monolithic counterparts. In this comparative study, FeCrV15 and FeCrV15 + Cr deposits were deposited on steel baseplate through Laser Additive manufacturing (laser cladding), and the hardness, microstructure and

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Merina, Albert Helen, C. Alosious Gonsago, Aanadhi S, and Sundar G. "Development and Characterization of an Organic Crystal: 2,6-diaminopyridinium paranitrophenolate paranitrophenol." Der Pharma Chemica 13, no. 1 (2021): 9. https://doi.org/10.5281/zenodo.13643808.

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An organic nonlinear optical single crystal of 2,6-diaminopyridinium paranitrophenolateparanitrophenol has been grown in the mixed solvent using slow solvent evaporation method at room temperature. For the structural and crystalline analysis, the grown crystal was subjected to single crystal X-ray diffraction, FT-IR and Raman spectral studies. Factor groups were identified and analyzed for the confirmation of IR and Raman active modes of vibrations. Optical absorbance spectrum in the wavelength range 400 to 800nm has been recorded for the grown crystal which designates the lower cutoff occurs

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Alharbi, Shaima, Abdulrahman Alshabib, Hamad Algamaiah, Muath Aldosari, and Abdullah Alayad. "Influence of Post-Printing Polymerization Time on Flexural Strength and Microhardness of 3D Printed Resin Composite." Coatings 15, no. 2 (2025): 230. https://doi.org/10.3390/coatings15020230.

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Background: The adoption of 3D printing in restorative dentistry is increasing, with the post-curing duration of a material being identified as a key determinant of its performance. This study evaluated the effect of the post-polymerization time on the flexural strength (FS) and Vickers microhardness (VHN) of a 3D-printed composite. Methods: Specimens of Formlabs Permanent Crown Resin were 3D printed and divided into four groups according to their post-curing time: no post-curing time and 20, 40, and 60 min post-curing time. Flexural strength testing was carried out using a three-point test of

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Karadag, Arif, Erhan Duru, Mehmet Uysal, Hatem Akbulut, and Aslan Coban. "Tribological performance of Ni-W/PTFE composite coating via pulse electrodeposition." Thermal Science 26, no. 4 Part A (2022): 2885–93. http://dx.doi.org/10.2298/tsci2204885k.

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The Ni-W/PTFE co-depositions were successfully prepared on steel via pulse electrodeposition methods. Electrodeposition was perform by dispersing 5-20 g/L PTFE particles from Ni-Watt bath. The surface morphology, phase analyses crstalytallite size, distorsion and hardness of the samples were characterized by SEM, XRD, and Vicker?s microhardness tester. The friction coefficient of the coatings were carried out using CSM microtester. As increasing with the concentration of the PTFE in the solution, the wear resistance properties of theco-depositions were increased. These experimental results det

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Wang, F., N. Fan, J. Zhu, and H. Jiang. "Fabrication and mechanical properties of Al2O3/TiAl in situ composites doped with Nb2O5." Science of Sintering 47, no. 3 (2015): 311–17. http://dx.doi.org/10.2298/sos1503311w.

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Al2O3/TiAl composites were successfully fabricated from powder mixtures of Ti, Al, TiO2, Cr2O3 and Nb2O5 by a hot-press-assisted exothermic dispersion method. The effect of the Cr2O3 and Nb2O5 addition on the microstructures and mechanical properties of Al2O3/TiAl composites was characterized. The results showed that the specimens are mainly composed of TiAl, Ti3Al, Al2O3, NbAl3 and Cr2Al. The Vicker-hardness and density of Al2O3/TiAl composites increase gradually with the increase of Nb2O5 content. When the Nb2O5 content was 6.54 wt %, the flexural strength and fracture toughness of the compo

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Pan, C. T., P. J. Cheng, S. C. Shen, et al. "Applications of LIGA on Micro-Punching Process for Metallic Materials." Materials Science Forum 505-507 (January 2006): 55–60. http://dx.doi.org/10.4028/www.scientific.net/msf.505-507.55.

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This study presents an innovative imprinting method to fabricate IC devices by micro-punch process. Normally, imprinting method is used to imprint plastic materials such as photoresist and polymeric materials. In this study, imprinting process is applied to micro-punch metallic materials directly for IC devices. Fabrications of IC devices with high aspect ratio structures ranging from micrometer to sub-micrometer are described. In this study, to keep the production costs as low as possible, a complete micro-punching process is applied to replicate IC devices. A combination of lithography, extr

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Yadava, Yogendra Prasad, and Ricardo Arthur Sanguinetti Ferreira. "Study of Sintering Behavior of Ba₂AlSnO_5.5 Ceramic Powder Compacts as Substrate for Temperature Sensing Devices." Materials Science Forum 591-593 (August 2008): 661–66. http://dx.doi.org/10.4028/www.scientific.net/msf.591-593.661.

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Ceramic components are frequently used as substrates for the production of temperature sensing devices in petroleum industries, in view of their high thermal and electrical resistance and inertness in hostile ambient conditions. Complex cubic perovskite oxide ceramics have a great advantage in terms of their varied physico-chemical characteristics with the substitution of structural elements in the respective formula units. In this context, we have produced Ba2AlSnO5.5 ceramics by solid state reaction process. Structural characteristics, studied by powder x-diffraction, reveal that Ba2AlSnO5.5

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Yohanes, Yohanes, Muftil Badri, and Syafirman Pramija. "The Effect of Variation of Bar Surface Chamfer Angle on Rotary Friction Welding Connections." Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) 67, no. 3 (2023): 76–82. http://dx.doi.org/10.36842/jomase.v67i3.320.

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This study aims to determine the effect of chamfer angle variations on flash, welding time, interface and hardness values at welded joints of similar materials. The method was used, with parameters of the rotational speed of 4.335 rpm, friction pressure of 0.5 MPa, forging pressure of 0.7 MPa, forging time of 10 seconds and chamfer angle variations of 0°, 15°, 30°, 45°. Then, the specimen result was tested using the projector profile, Non-Destructive Test (NDT), macro-observation, and Vicker test. The result showed that the greater the chamfer angle variation on the given bar surface, the smal

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Wang, Zhen Ting, and Jing Xin Fan. "Microstructure and Wear Resistance of ZrC Reinforced Metal Matrix Composite Coating by Gas Tungsten Arc Cladding." Advanced Materials Research 750-752 (August 2013): 2113–16. http://dx.doi.org/10.4028/www.scientific.net/amr.750-752.2113.

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The in situ synthesized ZrC particulate reinforced metal matrix composite coating was fabricated on AISI1020 steel by gas tungsten arc (GTA) cladding powder mixture of Nickel, Zirconium and Graphite. The microstructure and wear resistance of the composite coating were investigated. It is shown that the coating is bonded metallurgically to the substrate and has a homogeneous fine microstructure containing both approximate cubic ZrC particle uniformly dispersed in matrix of (Fe,Ni) solid solution. Compared to a substruate, the hardness of the composite coating was increased by a factor of 6, cou

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Lee, Cheng Kuo, Chung Sheng Chang, An Hung Tan, Ching Yi Yang, and Sheng Long Lee. "Preparation of Electroless Nickel-Phosphorous-TiO₂ Composite Coating for Improvement of Wear and Stress Corrosion Cracking Resistance of AA7075 in 3.5% NaCl." Key Engineering Materials 656-657 (July 2015): 74–79. http://dx.doi.org/10.4028/www.scientific.net/kem.656-657.74.

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In this study nanoTiO2 particles were incorporated into the electroless plating solution to prepare Ni-P-TiO2 composite coating on anodized AA7075 aluminum alloy to improve the wear and stress corrosion cracking resistance of the coated alloy in 3.5%NaCl solution. The anodized AA7075 aluminum alloy was also performed by a boiling water sealing treatment for comparison. The wear and stress corrosion cracking (SCC) characteristics were investigated using a self-designed block-on-ring machine and slow strain rate test. The effect of corrosion was evaluated by electrochemical polarization measurem

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Cai, Zhi Hai, Ping Zhang, Jia Wu He, Jun Jun Zhao, and Jun Tan. "Investigation of Mechanical Properties and Microstructure of Boron Films Implanted by Polyenergetic Nitrogen Ion." Key Engineering Materials 373-374 (March 2008): 396–99. http://dx.doi.org/10.4028/www.scientific.net/kem.373-374.396.

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In this paper, boron films were deposited on W6Mo5Cr4V2 high speed steel (HSS) via ion beam sputtering of boron target and implanted with polyenergetic(50 keV, 30 keV, 10 keV) nitrogen ions. The mechanical properties of the implanted layer were tested by Vicker`s hardness and SKODA wear tester. The microstructure of the implanted layer was analysed by X-ray Photoelectron Spectroscopy (XPS) and Fourier Infrared (IR) spectroscopy. Experimental results showed that the HSS substrate was intensified obviously after the implantation of boron and nitrogen ion. When the nitrogen dose equals to 12.8×10

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Abou Neel, Ensanya Ali, and Wojciech Chrzanowski. "Surface topography and mechanical properties of flax fibres modified glass ionomer restorative materials." Journal of Biomedical Engineering and Informatics 1, no. 1 (2015): 82. http://dx.doi.org/10.5430/jbei.v1n1p82.

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Objectives: Regardless of the excellent adhesive and biological properties of glass ionomer cements (GICs), their poor mechanical properties and abrasion resistance limit their application to non-load bearing areas. This study aimed to investigate the effect of flax fibres incorporation on surface and mechanical properties of GIC filling materials. Methods: Short chopped flax fibres were randomly incorporated into GIC at 0, 0.5, 1, 2.5, 5 and 25 wt%. Surface hardness, distribution of different phases, stiffness map, phase separation and uniformity of the material were investigated. Results: Ad

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Strobl, Susanne, and Roland Haubner. "Characterisation of Steel Composites Produced by the Damascus Technique." Materials Science Forum 825-826 (July 2015): 852–59. http://dx.doi.org/10.4028/www.scientific.net/msf.825-826.852.

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The Damascus technique is a manufacturing process where steels with different compositions, in particular the carbon content, are forge welded. Materials with contrary properties are generated by different carbon additions: e.g., substantial toughness and elongation are combined with high tensile strength and hardness. Since the 3rd century AD blades and weapons have been produced by this technique in Europe.In this work various Damascus steels with different compositions were investigated by means of metallographic methods. The focus is set on the interface between individual steel layers. Wh

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Sagane, V. R., P. M. Wankhade, and G.G. Muley. "Vicker's Microhardness Study of 1, 3 Dimethyl Urea Doped Amino Acid-Based L-Asparagine Monohydrate Single Crystals." International Journal of Advance and Applied Research 5, no. 23 (2024): 207–11. https://doi.org/10.5281/zenodo.13622270.

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Abstract:  The effect of 1, 3 dimethyl urea on optical and mechanical properties of L-asparagine monohydrate single crystal has been investigated in the present study. Optical studies on grown crystals show decrease in absorbance and increase in energy band gap of doped crystals. From the mechanical study it has been seen that the Vicker’s hardness number increases with applied load that confirm the Reverse Sized Indentation Effect (RISE). All the grown crystals belong to the soft category. The value of stiffness constant found to be high in doped crystals at higher load. It sh

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Asrar, S., M. Tufail, and A. D. Chandio. "Facile Coating of HAP on Ti6Al4V for Osseointegration." Engineering, Technology & Applied Science Research 11, no. 3 (2021): 7240–46. http://dx.doi.org/10.48084/etasr.4155.

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Ti6Al4V alloy is a material with great strength, low-slung modulus, inferior density, and a virtuous blend of mechanical and exceptional corrosion resistance. However, it does not offer good osseointegration and bone development properties. Conversely, hydroxyapatite (HAP) is highly bioactive in nature to bind with the nearby bone tissues when implanted in the host body. In this work, we have extracted HAP from bovine bones by using the thermal decomposition method. This was followed by its deposition onto the Ti6Al4V alloy using the Electrophoretic Deposition (EPD) technique. TiO2 is used as

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Akram, Muhammad Aftab, Mohammad Bilal Khan, Rafaqat Hussain, and Nida Iqbal. "Microwave Augmented Fabrication and Evaluation of CNT-Reinforced Nanohydroxyapatite." Advanced Materials Research 326 (September 2011): 110–20. http://dx.doi.org/10.4028/www.scientific.net/amr.326.110.

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Bioactive CNT reinforced hydroxyapatite nano-composite is synthesized by in-situ precipitation for use in load bearing orthopedic applications. Microwaves augment the synthesis, enhance the reaction rate, and institute energy savings. Heat and acid treated purified CNTs in microwaves are functionalized and dispersed in calcium nitrate tetrahydrate. Diammonium hydrogen phosphate is incorporated in calcium ion solution to furnish the required Ca:P ratio. Refluxing of the precursor solution is accomplished under microwaves. XRD shows the phase purity and crystallinity, FTIR spectroscopy indicates

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Sarfraz, Syed Muhammad Abouzar, Shazia Bashir, and Khaliq Mahmood. "Laser sputtering of Zr under Ar and O2 environments explored by quartz crystal microbalance and SEM analysis." Laser and Particle Beams 37, no. 01 (2019): 128–40. http://dx.doi.org/10.1017/s026303461900017x.

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AbstractThe effect of laser fluence and nature of ambient environments on the sputtering yield, surface modifications, crater depth, UV-visible absorption spectra, chemical composition, and micro hardness of Zr has been investigated. Nd: YAG laser (532 nm, 10 Hz, 6 ns) at different fluences varying from 16 to 60.8 Jcm−2 was employed as an irradiation source. All measurements are performed under two ambient environments of Ar and O2 at a constant pressure of 10 Torr. Quartz crystal microbalance has been employed for the measurement of sputtering yield of laser irradiated Zr. It is revealed that

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Akhmad, Ashri Kharismasuddin, Setiyo Umartono Agus, and Sutrisno. "Pengaruh Temperatur Heating pada Baja SUP 9-A terhadap Supllier JTS (Jatim Taman Steel)." Wahana Teknik 8, no. 1 (2019): 9–15. https://doi.org/10.5281/zenodo.3833413.

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Persaingan dunia industri manufaktur di pasar global sangat ketat sehingga diperlukan banyak improvement dalam menciptakan efisiensi proses produksi sehingga dapat menekan biaya produksi. Pada penelitian ini akan dianalisa pengaruh temperatur pada proses heating baja SUP 9A terhadap supplier baru dari JTS (Jatim Taman Steel), sebelumnya dipenuhi oleh Indobaja, dengan tiga variabel temperatur yang berbeda pada proses heating untuk mengetahui berapa standart minimal proses heating untuk mendapatkan hardness, komposisi kimia, dan struktur mikro yang layak. Material baja SUP 9A dengan dimensi 70 m

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Soosai, Ananthan, Suresh Muniandy, and Teow Hsien Loong. "Influence of Manganese Oxide on the Sintering Properties of Ceria-Stabilized Tetragonal Zirconia." Materials Science Forum 1030 (May 2021): 179–85. http://dx.doi.org/10.4028/www.scientific.net/msf.1030.179.

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Ceria stabilized zirconia with critical grain size is found to exhibit higher strength and higher resistance towards low temperature moisture degradation, The mechanical properties are greatly influenced by the size of the tetragonal grains. The effectiveness of doping with MnO2 (0.2 to wt %) in retarding degradation mechanical properties of ceria stabilized tetragonal zirconia (Ce-ZrO2) was evaluated by pressureless sintering within a temperature range from 1250°C-1550°C. Impact of manganese oxide to the mechanical properties and ageing resistance to the Ce-ZrO2 is truly beneficial. 0.4 wt% M

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Yang, Mei, Zheng Lei, Xiao Hong Wang, Ping Wang, and Jun Yang. "Influence of Current Density on Structure and Performance of Micro-Arc Oxidation Coatings on AZ31 Magnesium Alloy." Advanced Materials Research 189-193 (February 2011): 562–66. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.562.

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In the Na2SiO3-NaOH-C3H8O3electrolyte system,the micro-arc oxidation (MAO) coatings were prepared on AZ31 magnesium alloy when J=2A/dm2,4A/dm2,8A/dm2and 12A/dm2.The relations of current density with microstructure and performance of the MAO coatings on AZ31 were studied by means of SEM, XRD, HVS-1000 micro Vicker, MFT-4000 Scratch Tester and electro-chemical method. The results show that when current density increases,the thickness,growth rate,micro-hardness and the contents of MgO and Mg2SiO4of MAO coatings increase,but the adhesion force between MAO coating and substrate decreases, the milli

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