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Journal articles on the topic 'Powders characterization'

Author: Grafiati

Published: 4 June 2021

Last updated: 8 February 2022

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1

Condruz, Mihaela Raluca, Gheorghe Matache, and Alexandru Paraschiv. "Characterization of IN 625 recycled metal powder used for selective laser melting." Manufacturing Review 7 (2020): 5. http://dx.doi.org/10.1051/mfreview/2020002.

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Additive manufacturing of high-quality materials by Selective Laser Melting depends not only on establishing appropriate process parameters, but also on the characteristics of the metal powders used and their stability over time or after recycling. The aim of the research was to characterize the IN 625 powder used over multiple manufacturing cycles with a Lasertec 30 SLM machine. In order to achieve the research's goal, virgin and recirculated powder's physical and technological characteristics were investigated. A decrease in all D-values (D10, D50, D90) of the powder size distribution was ob

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Sheng, Yan Wei, Zhi Meng Guo, and Jun Jie Hao. "Characterization of Spherical Molybdenum Powders Prepared by RF Plasma Processing." Advanced Materials Research 482-484 (February 2012): 2563–67. http://dx.doi.org/10.4028/www.scientific.net/amr.482-484.2563.

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Spherical molybdenum powders were synthesized by (RF) plasma with irregular molybdenum powders. The powder characteristics and spheroidization efficiency of the feeding rate for obtain the spherical molybdenum powders were studied. The phase composition and morphological properties of the powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM). As a result, the fine spherical powders composed of pure molybdenum with favorable dispersity and its surface became smooth. The spheroidization efficiency of synthesized powders was almost 100 % at feeding rate of 5g/m

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Li, Hui Qin, Ji Xian Gong, and Yi Zhang. "Characterization of Protein Powder from Waste Rabbit Hair." Advanced Materials Research 194-196 (February 2011): 407–10. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.407.

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Rabbit hair is an important animal fiber in China, making up 90% of the total output in the world. Fuds is one of familiar problems in the processing of rabbit hair, which lead to plenty of waste fibers. Recently, there has been interest in converting protein fibers into powder to develop their new uses. This provides great opportunities for waste rabbit hair. In this study, rabbit hair powders have been produced and the structure and properties were characterized at multi-level. Surface morphology of rabbit hair powders was observed by scanning electron microscopy (SEM) and the majority of ra

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Yang, Lian Wei, Rui Jie Wang, and Guo Sheng Gai. "Preparation and Characterization of Honghua Powders by Ultrafine Pulverization." Advanced Materials Research 454 (January 2012): 55–58. http://dx.doi.org/10.4028/www.scientific.net/amr.454.55.

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Honghua has been demonstrated useful for promoting blood circulation and stopping pain. The physicochemical characterization of Honghua powders was greatly influenced by ultrafine pulverization. To study the physicochemical characterization of Honghua, the raw plant material of Honghua was ground to powders by high speed centrifugal sheering (HSCS) pulverizer. The micron powders were characterized by laser scattering granulometric analyzer and scanning electron microscope (SEM). Hydroxysafflor yellow A is one of active ingredients of Honghua, and its dissolution speed was determined to evaluat

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Young, Benjamin, Joseph Heelan, Sean Langan, Matthew Siopis, Caitlin Walde, and Aaron Birt. "Novel Characterization Techniques for Additive Manufacturing Powder Feedstock." Metals 11, no. 5 (2021): 720. http://dx.doi.org/10.3390/met11050720.

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Additive manufacturing is a rapidly expanding field, encompassing many methods to manufacture parts and coatings with a wide variety of feedstock. Metal powders are one such feedstock, with a range of compositions and morphologies. Understanding subtle changes in the feedstock is critical to ensure successful consolidation and quality control of both the feedstock and manufactured part. Current standards lack the ability to finely distinguish almost acceptable powders from barely acceptable ones. Here, novel means of powder feedstock characterization for quality control are demonstrated for th

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Li, Zai Yuan, Myongil Pang, and Yu Chun Zhai. "Preparation and Characterization of Fe90Ni6Cu4 Alloy Powders." Advanced Materials Research 233-235 (May 2011): 930–33. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.930.

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The Fe90Ni6Cu4 precursor powder was prepared by chemical co-precipitation taken FeSO4·7H2O, NiSO4·6H2O, CuSO4·5H2O and NaOH as raw materials. The Fe90Ni6Cu4 precursor powder shape was majority stick, its diameter was about 10nm, length was about 100nm. The reaction conditions were that concentration of Fe2+, Ni2+and Cu2+mix solution was 0.1mol·L-1, NaOH solution concentration was 4 mol·L-1, the dropping rate of NaOH solution was 50 ml·min-1, the reaction temperature was 30°C, the pH value of the reaction end was 11, the stirring rate was 1200 r·min-1. The Fe90Ni6Cu4 alloy powders were obtained

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Lee, Sang Jin, and Choong Hwan Jung. "Characterization of Nano Scaled Mullite Powders Prepared by Organic-Inorganic Solution Technique." Solid State Phenomena 119 (January 2007): 43–46. http://dx.doi.org/10.4028/www.scientific.net/ssp.119.43.

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Nano scaled mullite (3Al2O3·2SiO2) powders had been fabricated by an organic-inorganic solution technique using a polyvinyl alcohol (PVA) as an organic carrier. PVA polymer contributed to a soft and porous powder microstructure, and ball milling with the porous powder was effective in making nano-sized mullite powders. In addition, the degree of polymerization of PVA affected the crystallization behavior. The fully crystallized and ball-milled mullite powders had an average particle size of 120 nm with a specific surface area of 67.0 m2/g. In this paper, the simple solution technique and milli

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Gromov, Nalivaiko, Ambaryan, et al. "Aluminum–Alumina Composites: Part Ⅰ: Obtaining and Characterization of Powders." Materials 12, no. 19 (2019): 3180. http://dx.doi.org/10.3390/ma12193180.

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The process of advanced aluminum-alumina powders production for selective laser melting was studied. The economically effective method of obtaining aluminum–alumina powdery composites for further selective laser melting was comprehensively studied. The aluminum powders with 10–20 wt. % alumina content were obtained by oxidation of aluminum in water. Aluminum oxidation was carried out at ≤200 °C. The oxidized powders were further dried at 120 °C and calcined at 600 °C. Four oxidation modes with different process temperatures (120–200 °C) and pressures (0.15–1.80 MPa) were investigated. Paramete

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Stefan, I., and G. C. Benga. "Elaboration and Characterization of the Nanometric Titanium Diboride Powders by Mechanical Milling Method." Annals of Dunarea de Jos University of Galati Fascicle XII Welding Equipment and Technology 31 (December 28, 2020): 55–58. http://dx.doi.org/10.35219/awet.2020.08.

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The research activities are oriented towards elaborating and characterizing nano-sized powders by powder metallurgy technologies based on wet milling in a planetary mill. For the elaboration of the TiB2 powders, a wet milling regime of initial powders was used up to nano size with the following parameters: milling technology by collision, milling times, rotational speed. The characterization of the TiB2 material will include particle size distribution analysis. EDXS and SEM analysis were used to study the structural evolution of the powder after ball milling. The mechanical milling technology,

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Haušild, Petr, Jaroslav Čech, Miroslav Karlík, Filip Průša, Pavel Novák, and Jaromír Kopeček. "Nanoindentation Characterization of Mechanically Alloyed Fe-Al-Si Powders." Key Engineering Materials 784 (October 2018): 15–20. http://dx.doi.org/10.4028/www.scientific.net/kem.784.15.

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The effect of processing conditions on microstructure and mechanical properties of Fe-Al-Si powders was studied by means of scanning electron microscopy, X-ray diffraction and nanoindentation. Fe-Al-Si alloy powder was prepared from pure elemental powders by mechanical alloying. Microstructure and mechanical properties of powders were characterized after various durations of mechanical alloying. Special sample preparation technique was developed allowing to characterize the properties of individual powder particles after each step of processing in a planetary ball mill. This step-by-step chara

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Tomasi, Roberto, Adriano A. Rabelo, Adriana S. A. Chinelatto, Laudo Reis, and Walter J. Botta Fo. "Characterization of high-energy milled alumina powders." Cerâmica 44, no. 289 (1998): 166–70. http://dx.doi.org/10.1590/s0366-69131998000500003.

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The utilization of reactive high-energy milling has been reported for the synthesis of ceramic powders namely, metal oxides, carbides, borides, nitrides or mixtures of ceramics or ceramic and metal compounds. In this work, high-energy milling was used for reduction of alumina powders to nanometric particle size. The ceramic characteristics of the powders were analyzed in terms of the behavior during deagglomeration, compaction curves, sintering and microstructure characterization. It was observed that the high energy milling has strong effect in producing agglomeration of the nanosized powders

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Hunt, Emily M., and Matt Jackson. "Coating and Characterization of Mock and Explosive Materials." Advances in Materials Science and Engineering 2012 (2012): 1–5. http://dx.doi.org/10.1155/2012/468032.

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This project develops a method of manufacturing plastic-bonded explosives by using use precision control of agglomeration and coating of energetic powders. The energetic material coating process entails suspending either wet or dry energetic powders in a stream of inert gas and contacting the energetic powder with atomized droplets of a lacquer composed of binder and organic solvent. By using a high-velocity air stream to pneumatically convey the energetic powders and droplets of lacquer, the energetic powders are efficiently wetted while agglomerate drying begins almost immediately. The resul

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Pavlovic, M. G., B. M. Jovic, V. D. Jovic, U. Lacnjevac, and V. M. Maksimovic. "Electrochemical deposition and characterization of Ni-Mo alloy powders." Processing and Application of Ceramics 1, no. 1-2 (2007): 11–17. http://dx.doi.org/10.2298/pac0702011p.

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Electrodeposition of Ni-Mo alloy powders from ammonium sulfate and ammonium chloride containing electrolytes of different Ni/Mo ions concentration ratios was investigated by polarization measurements. The morphology, chemical composition and phase composition of electrodeposited Ni-Mo alloy powders were investigated using DSC, TGA, SEM, EDS and XRD analysis. EDS results showed that powder composition depends on Ni/Mo ions concentration ratio, as well as on the position where the EDS analysis was performed. As-deposited alloy powders were nanocrystalline showing no XRD peaks with undefined morp

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14

Lu, Liang Liang, Shao Ming Zhang, Jun Xu, et al. "Solidification Characterization of K418 Alloy Powders Fabricated by Argon Gas Atomization." Materials Science Forum 849 (March 2016): 788–93. http://dx.doi.org/10.4028/www.scientific.net/msf.849.788.

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The solidification characterization of K418 alloy powders prepared by argon atomization was studied, and thermal parameters of the alloy powder during solidification process were calculated. The results show that powder morphology is spherical shape, the average diameter of the powder is 55μm, the amount of less 100μm powder is about 90 percent, the solidification microstructure of powders particle surface are dentrite and cellular structure. Decreasing the particle size, the microstructures of particle interior change from dentrite in major to cellular structures, and the structure is more un

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Palomares-Sánchez, S., S. Ponce-Castañeda, F. Ruiz, M. Mirabal-García, J. R. Martínez, and S. Díaz-Castañón. "Structural and magnetic characterization of (Ba,Sr)-hexaferrite Powders." Revista de Metalurgia 35, no. 3 (1999): 143–47. http://dx.doi.org/10.3989/revmetalm.1999.v35.i3.617.

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Nogueira, M. V., G. M. M. M. Lustosa, Y. Kobayakawa, et al. "Nb-Doped TiO2 Photocatalysts Used to Reduction of CO2 to Methanol." Advances in Materials Science and Engineering 2018 (2018): 1–8. http://dx.doi.org/10.1155/2018/7326240.

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In pursuit of higher photoactivity, Nb-doped TiO2 powders were evaluated in the reduction of CO2. The replacement of Ti by Nb in the crystalline structure of TiO2 promoted methanol formation. Nb-doped TiO2 powders were successfully synthesized in Nb concentrations of 0.0, 0.5, 1.0, and 2.5% (w/w = weight/weight) using the Pechini method. The materials were calcined at 500°C for two hours to promote the formation of the anatase crystalline phase. After characterization, the powders were modified through an Nb0 magnetron sputtering deposition using a metallic target in vacuum conditions of 2 × 1

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17

Gan, Linli, Heng Guo, Zhiheng Xiao, et al. "Dyeing and Characterization of Cellulose Powder Developed from Waste Cotton." Polymers 11, no. 12 (2019): 1982. http://dx.doi.org/10.3390/polym11121982.

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In this study, waste cotton fibers were environmentally reused. First, they were milled into fine powders with particle sizes of around 30 µm and dyed for use as pigments. Dyeing properties of the cellulose powder were explored by determining the dye uptake, K/S value, and bath ratio. Among the various samples, powders with owf (on weight of fabric) of 0% dye (pristine cellulose powder), and 10% and 50% dyed powders were selected; and these powders were characterized by several methods to compare the properties of dyed and undyed cellulose. The surface morphologies of the powders were observed

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18

Liu, Z., C. Huang, C. Gao, R. Liu, J. Chen, and Z. Xiao. "Characterization of Ti6Al4V powders produced by different methods for selective electron beam melting." Journal of Mining and Metallurgy, Section B: Metallurgy 55, no. 1 (2019): 121–28. http://dx.doi.org/10.2298/jmmb181025008l.

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Three different types of Ti6Al4V powders produced by electrode induction melting gas atomization (EIGA), plasma rotating electrode process (PREP), and plasma atomization (PA) were compared from these aspects: particle size distribution, particle shape, and microstructure. Theywere characterized by particle size and shape analyzer, scanning electron microscope, and X-ray diffraction. The results show some benefits of using PA Ti6Al4V powder in selective electron beam melting. The particle size distribution of these Ti6Al4V powders were bimodal, and the PA Ti6Al4V powder had the narrowest partic

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19

Plummer, H. K., W. T. Donlon, J. E. Allison, and S. Shinozaki. "The characterization of rapidly solidified Al-8Fe-2Mo powder." Proceedings, annual meeting, Electron Microscopy Society of America 44 (August 1986): 546–47. http://dx.doi.org/10.1017/s0424820100144206.

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A centrifugally atomized rapidly solidified Al-8Fe-2Mo powder was characterized by Light Microscopy (LM), Scanning Electron Microscopy (SEM) and Analytical Electron Microscopy (AEM). The powder sample was studied in an as-solidified state and after annealing in 1 at. argon for 6 hr at 400°C. Further studies have characterized the consolidated bars produced by compaction and extrusion of these powders.The 30 to 150 μm powders are spherical as seen in the SEM (Fig.1) with small (5 to 15 μm) satellite powders sometimes attached in external (A,B Fig.1) and internal (A Fig.2C) locations. A comparis

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FATHI, M. H., and M. KHARAZIHA. "MECHANOCHEMICAL SYNTHESIS AND CHARACTERIZATION OF NANOSTRUCTURE FORSTERITE BIOCERAMICS." International Journal of Modern Physics B 22, no. 18n19 (2008): 3082–91. http://dx.doi.org/10.1142/s0217979208047948.

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Recent investigations suggest that forsterite ceramics possess good biocompatibility and mechanical properties and might be suitable for potential application like bone implant material. In this study, nanocrystalline forsterite ( Mg 2 SiO 4) powder was prepared by mechanochemical method and subsequent heat treatment and the effect of fluorine ion as catalyst was studied. Mechanochemical process and heat treatment were done on the MgCO 3, SiO 2 and ( NH 4)2 SiF 6 powders. The synthesized powders were characterized by X-ray diffraction (XRD), thermogravimetric (TG) analyses and scanning electro

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Tshabalala, Lerato Criselda, Ntombizodwa Mathe, and Hilda Chikwanda. "Characterization of Gas Atomized Ti-6Al-4V Powders for Additive Manufacturing." Key Engineering Materials 770 (May 2018): 3–8. http://dx.doi.org/10.4028/www.scientific.net/kem.770.3.

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In this paper, titanium powders from various sources were characterized to compare powder intergrity for additive manufacturing by selective laser melting process. Selective laser melting by powder-bed based Additive Manufacturing (AM) is an advanced manufacturing process that bonds successive layers of powder by laser melting to facilitate the creation of engineering components. This manufacturing approach facilitates the production of components with high geometrical complexity that would otherwise be impossible to create through conventional manufacturing processes. Although the use of powd

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Vajpei, A. J., and Gopal S. Upadhyaya. "Characterization of Oxide Powders." Key Engineering Materials 75-76 (January 1992): 91–118. http://dx.doi.org/10.4028/www.scientific.net/kem.75-76.91.

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Sheppard, Laurel, and D. R. Johnson. "Characterization of Ceramic Powders." Materials and Processing Report 2, no. 11 (1988): 1. http://dx.doi.org/10.1080/08871949.1988.11752131.

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Petzow, G., and R. Sersale. "Characterization of Si3N4 powders." Pure and Applied Chemistry 59, no. 12 (1987): 1673–80. http://dx.doi.org/10.1351/pac198759121673.

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CHENG, JIN-BO, AI-DONG LI, QI-YUE SHAO, YUE-FENG TANG, and DI WU. "SYNTHESIS AND CHARACTERIZATION OF FERROELECTRIC NANOCRYSTAL POWDERS OF SrBi2Ta2O9 BY A POLYMERIZABLE COMPLEX METHOD." International Journal of Modern Physics B 19, no. 15n17 (2005): 2514–19. http://dx.doi.org/10.1142/s0217979205031249.

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Ferroelectric nanocrystal powders of SrBi2Ta2O9 (SBT) have been first prepared by a polymerizable complex (PC) route. The bismuth powder, strontium carbonate, and water-soluble tantalum oxalate solution were used as starting materials. Thermal analyses (TGA and DSC), x-ray diffraction (XRD), transmission electron microscopy (TEM), and conventional BET method were explored to characterize the structure, morphology, and specific surface area of PC-derived SBT powders calcined at 500-850 °C. As control samples, SBT powders were also fabricated by metalorganic decomposition (MOD) method. The XRD a

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Basosidik, Suraida, Piyapong Pankaew, Ekachai Hoonnivathana, Pichet Limsuwan, and Kittisakchai Naemchanthara. "Characterization of Chitin Extracted from Waste Sources via XRD, FTIR, and TGA Techniques." Advanced Materials Research 488-489 (March 2012): 1404–8. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.1404.

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This work presents the chitin preparation from waste sources, the chitin powders were successfully extracted from shrimp shell, crab shell and squid pen. To prepare chitin powders, all raw materials were washed and grounded using agate mortar, which the particle size of powder is 212–250 μm. Then, the powdered materials were immersed into solution of chloroform and methanol (with 2:1 ratio) at room temperature for removing fat. The deprotienation and decarbonation, the samples were immersed in 50 wt% of NaOH solution for 24 h and in 4 wt% of HCl for 1 h, respectively. The XRD, FT-IR and TGA te

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Vähä-Nissi, Mika. "Characterization of filled powders for powder coating of paper." Powder Technology 279 (July 2015): 127–33. http://dx.doi.org/10.1016/j.powtec.2015.04.008.

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Yeh, Tze Yang, and Kuo Yuan Peng. "Characterization of Simultaneously Gas Atomized Ti/TiC Composite Powders." Key Engineering Materials 704 (August 2016): 302–7. http://dx.doi.org/10.4028/www.scientific.net/kem.704.302.

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Metallic composite materials are mainly manufactured by powder metallurgy (PM) or casting, with reinforced ceramic particulates dispersed in a metal matrix. The current study presents an investigation with respect to simultaneously gas-atomized spherical Ti/TiC composite powders. Various analytical methods are used to characterize the gas-atomized Ti/TiC composite powders, including XRD, laser particle size analysis, flow rate tests, apparent density and tap density tests, SEM, and alike. The spherical Ti/TiC composite powders will be further laser sintered at the next stage to utilize mechani

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Otmane, Fadhéla, Salim Triaa, A. Maali, and B. Rekioua. "Synthesis and Characterization of Fe-Based Nanocomposites." Diffusion Foundations 22 (May 2019): 39–47. http://dx.doi.org/10.4028/www.scientific.net/df.22.39.

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This study reports on the elaboration and characterization of bulk nanocomposites samples obtained by dispersion of metallic powders at the nanoscale as reinforcements in a polymer matrix. Elemental Fe powders were successfully nanostructured via high-energy ball milling. Structural characterization of the produced powders was conducted using X-Ray Diffraction (XRD) analysis and Scanning Electron Microscopy (SEM). The Halder-Wagner approach was adopted to determine the powder’s average grain size, internal strain, lattice parameters and the mixing factors. Structural parameters evolution and m

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Käerdi, Helmo, Dmitri Goljandin, Priit Kulu, Heikki Sarjas, and Valdek Mikli. "Characterization of Mechanical Milling Cermet Powders Produced by Disintegrator Technology." Key Engineering Materials 527 (November 2012): 148–53. http://dx.doi.org/10.4028/www.scientific.net/kem.527.148.

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The current paper deals with characterization of TiC−NiMo cermet powders produced by mechanical milling technology. TiC-based cermets scrap was processed by semi-industrial and laboratory disintegrator milling system. Chemical composition, shape and size of produced powders were analyzed. To estimate the properties of recycled cermet powders the sieving analysis, and angularity studies were conducted. The grindability was estimated using specific energy parameter (Es). Considering that viewpoint, the study is focused on angularity studies as the shape of spray powder has considerable influence

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Giannouli, Christina. "Magnetite: Synthesis and Characterization." Key Engineering Materials 543 (March 2013): 460–63. http://dx.doi.org/10.4028/www.scientific.net/kem.543.460.

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Magnetite nanopowder is a nanostructured magnetic material which is of great importance due to its electric and magnetic properties at room temperature. There are quite enough methods to produce magnetite. In the present work, four samples of magnetite powder were produced, the first three with the alkaline precipitation method from aqueous solution of mixed Fe (II)/Fe (III) salts, without any surfactants and the last one with the micro emulsion method. The prepared powders have been characterized using transmission electron microscopy, Raman and FT-IR spectroscopy and x-ray diffraction in ord

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Lapčík, Lubomír, Martin Vašina, Barbora Lapčíková, et al. "Materials characterization of advanced fillers for composites engineering applications." Nanotechnology Reviews 8, no. 1 (2019): 503–12. http://dx.doi.org/10.1515/ntrev-2019-0045.

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Abstract Four different minerals were investigated; hollow spheres of calcium carbonate, platy mica, needle like wollastonite and glassy perlite and characterized via iGC for surface energy, Freeman powder rheology for flow characterization, cyclic uniaxial die compaction for modulus of elasticity and frequency dependent sound absorption properties. Particle surface energy and particle shape strongly affected the packing density of powder beds. In the case of higher porosity and thus lower bulk density, the powders acoustic absorption was higher in comparison with higher packing density materi

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Miyake, Shugo, Taisei Izumi, and Rino Yamamoto. "Effect of the Particle Size of Al/Ni Multilayer Powder on the Exothermic Characterization." Materials 13, no. 19 (2020): 4394. http://dx.doi.org/10.3390/ma13194394.

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In this study, the exothermic temperature performance of various Al/Ni multilayer powders with particle sizes ranging from under 75 to over 850 µm, which generate enormous heat during self-propagating exothermic reactions, was determined using a high-speed sampling pyrometer. The Al/Ni multilayer powders were prepared by a cold-rolling and pulverizing method. The multilayer constitution of the Al/Ni multilayer powders was examined by observing the cross-section of the powders using scanning electron microscopy; the results indicate that the powders had similar lamellar structures regardless of

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Moskal, Grzegorz, Aleksander Iwaniak, and Aleksandra Rozmysłowska-Grund. "Characterization of Thermal Properties of Micro-Sized Ceramic Powders for APS Deposition of Ceramic Layers." Key Engineering Materials 484 (July 2011): 152–57. http://dx.doi.org/10.4028/www.scientific.net/kem.484.152.

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The paper presents test results concerning characteristics of the selected thermal properties of ceramic powders based on rare earth zirconates with a pyrochlore structure of RE2Zr2O7 type, intended for thermal spraying of TBCs. Gadolinium, lanthanum, samarium and neodymium based powders were tested. The scope of the tests encompassed thermal diffusivity analysis of the powders in a compressed pellets form within temperature range 25-1500°C, and also tests of specific heat and thermal expansion coefficient within similar temperature range. Standard powder of 8YSZ type on the basis of zirconium

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Simões, Sónia, Filomena Viana, Marcos A. L. Reis, and Manuel F. Vieira. "Microstructural Characterization of Aluminum-Carbon Nanotube Nanocomposites Produced Using Different Dispersion Methods." Microscopy and Microanalysis 22, no. 3 (2016): 725–32. http://dx.doi.org/10.1017/s143192761600057x.

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AbstractThis research focuses on characterization of the impact of dispersion methods on aluminum-carbon nanotubes (Al-CNTs) nanocomposite structure. Nanocomposites were produced by a conventional powder metallurgy process after the dispersion of the CNTs on the Al powders, using two approaches: (1) the dispersion of CNTs and mixture with Al powders were performed in a single step by ultrasonication; and (2) the CNTs were previously untangled by ultrasonication and then mixed with Al powders by ball milling. Microstructural characterization of Al-CNT nanocomposites was performed by optical mic

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Delloro, Francesco, Hugo Durand, Laurent Lacourt, et al. "Characterization of mechanical behaviour of aluminum powders under fast dynamic conditions." EPJ Web of Conferences 250 (2021): 01036. http://dx.doi.org/10.1051/epjconf/202125001036.

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Cold spray is a process belonging to the thermal spray family, characterized by relatively low temperatures and high particle velocities. Upon impact, particles undergo large plastic deformation at solid state in dynamic regime up to 109 s-1. The knowledge of powder behaviour in such conditions is essential to catch key phenomena in cold spray and a necessary step for a correct process modelling. However, little is known on mechanical behaviour of feed-stock powders when submitted to cold spray conditions. In this study, an approach focused on single particles combining laser shock induced imp

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Tsaknopoulos, Kyle, Caitlin Walde, Derek Tsaknopoulos, Victor Champagne, and Danielle Cote. "Characterization of Thermally Treated Gas-Atomized Al 5056 Powder." Materials 13, no. 18 (2020): 4051. http://dx.doi.org/10.3390/ma13184051.

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Aluminum 5056 is a work-hardenable alloy known for its corrosion resistance with new applications in additive manufacturing. A good understanding of the secondary phases in Al 5056 powders is important for understanding the properties of the final parts. In this study, the effects of different thermal treatments on the microstructure of Al 5056 powder were studied. Thermodynamic models were used to guide the interpretation of the microstructure as a function of thermal treatment, providing insight into the stability of different possible phases present in the alloy. Through the use of transmis

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Suhag, Yogita, Gulzar Ahmad Nayik, Ioannis K. Karabagias, and Vikas Nanda. "Development and Characterization of a Nutritionally Rich Spray-Dried Honey Powder." Foods 10, no. 1 (2021): 162. http://dx.doi.org/10.3390/foods10010162.

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In the present study, the spray-dried honey powder enriched with aonla (Emblica officinalis Gaertn) and basil (Ocimum sanctum) extract was developed using drying aids—gum arabic (GA), maltodextrin (MD), and whey protein concentrate (WPC), and then characterized based on particle size distribution, colour, glass transition temperature (Tg), X-ray diffraction, and antioxidant and rheological properties. Results showed the highest Tg (86.13 °C) for WPC based honey powder, which, in turn, resulted in least stickiness as compared to GA and MD based honey powders with Tg 74.53 °C and 68.26 °C, respe

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Hsu, Kuo Chin, Jiunn Der Liao, Zheng Zhong Xie, and Yaw Shyan Fu. "Preparation and Characterization of Cubic and Rod-Shaped Indium Tin Oxide Powders Using the Hydrothermal Process." Applied Mechanics and Materials 479-480 (December 2013): 64–68. http://dx.doi.org/10.4028/www.scientific.net/amm.479-480.64.

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The cubic and rod-shaped powders of indium tin oxide were synthesized at a stable temperature reaction for 18h using the surfactant aid hydrothermal method under various conditions. The cubic and rod-shaped powder size changes with the concentration of the precursor. The finished products of indium tin oxide can be obtained by calcination at 500°C for 2h in air. Characterization was conducted using scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), X-ray diffractometry (XRD), thermogravimetric analyzer/differential thermal analysis (TG/DTA) and the Brunauer-Emmett-Teller

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40

Hsu, Kuo Chin, Jiunn Der Liao, Zheng Zhong Xie, and Yaw Shyan Fu. "Preparation and Characterization of Cubic and Rod-Shaped Indium Tin Oxide Powders Using the Hydrothermal Process." Applied Mechanics and Materials 311 (February 2013): 430–34. http://dx.doi.org/10.4028/www.scientific.net/amm.311.430.

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The cubic and rod-shaped powders of indium tin oxide were synthesized at a stable temperature reaction for 18h using the surfactant aid hydrothermal method under various conditions. The cubic and rod-shaped powder size changes with the concentration of the precursor. The finished products of indium tin oxide can be obtained by calcination at 500°C for 2h in air. Characterization was conducted using scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), X-ray diffractometry (XRD), thermogravimetric analyzer/differential thermal analysis (TG/DTA) and the Brunauer-Emmett-Teller

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Li, B., Xin Long Wang, B. Guo, Yu Mei Xiao, Hong Song Fan, and Xing Dong Zhang. "Preparation and Characterization of Nano Hydroxyapatite." Key Engineering Materials 330-332 (February 2007): 235–38. http://dx.doi.org/10.4028/www.scientific.net/kem.330-332.235.

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The aim of this study is to prepare nano hydroxyapatite powder. Hydroxyapatite powder was prepared via co-precipitated method with the addition of citric acid at pH 9-11 in ambient environment. The precipitates were aged for 24hs, and then milled into powder after washed and dried. The particle morphology and particle size of as prepared HA powders were characterized. The results showed that hydroxyapatite powder with width of 10-30nm and length of 30-100nm was prepared by wet co-precipitation.

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Afonso, Conrado Ramos Moreira, Claudemiro Bolfarini, Walter José Botta Filho, and Claudio Shyinti Kiminami. "Overspray Powder Characterization of Fe-Based Glassy Alloy." Materials Science Forum 727-728 (August 2012): 468–75. http://dx.doi.org/10.4028/www.scientific.net/msf.727-728.468.

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Powder of Fe72Nb4Si10B14 (%at) glassy alloy was obtained by gas atomization in order to investigate the possibilities of amorphous phase formation due to the high cooling rates (103 105 K/s) involved in this process. The ratio between the gas volumetric and the metal mass flow rates used was 1.0, and nitrogen (N2) was used as the atomization gas. The powder, sieved in different granulometric size ranges, was characterized through: X-ray diffratometry (XRD), differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). Fe72Nb4Si10B14 (%at) bulk metallic glass (BMG) showed comp

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Nagata, Kohei, Toshiisa Konishi, Michiyo Honda та Mamoru Aizawa. "Preparation and Characterization of β-Tricalcium Phosphate Powders with High Solubility for Chelate-Setting Calcium-Phosphate Cements". Key Engineering Materials 758 (листопад 2017): 194–98. http://dx.doi.org/10.4028/www.scientific.net/kem.758.194.

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We have previously developed a novel chelate-setting β-tricalcium phosphate (β-TCP) cement with non-fragmentation property in vivo. This novel cement has been set on the basis of chelate-setting mechanism of inositol phosphate (IP6). In this study, β-TCP powders were synthesized by mechanochemical method, and the as-prepared powders were heated at 600-1300°C for 1 h. Some properties of the resulting powders were examined. The crystalline phase of the resulting powders in the range of 600-1100°C was of β-TCP single phase. In the cases at 1200°C and 1300°C, the resulting powders were composed of

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Park, Dae Chul, Toyohiko Yano, Sae Hoon Kim, Won Youl Choi, and Jung Hee Cho. "Surface Characterization of the Milled–Silicon Nitride Nano Powders by XPS and TEM." Key Engineering Materials 326-328 (December 2006): 409–12. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.409.

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We studied the surface characterization of milled–silicon nitride nano-powders by XPS and TEM. The change of the chemical state and morphology of the oxide layer on the surface of Si3N4 nano-particles before and after a conventional wet–ball–milling process are investigated by X–ray photoelectron spectroscopy for measuring the chemical state of the oxide layer and transmission electron microscopy for observing surface morphology. The native oxide layers of as-received Si3N4 powders confirmed by HREM observation and their chemical states were different each other. As increasing ball–milling tim

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Ahmad, M., E. Ahmed, N. R. Khalid, M. J. Jackson, and W. Ahmed. "Synthesis and Characterization of Hexagonal Shaped Nanocrystalline Zinc Oxide Powders." International Journal of Manufacturing, Materials, and Mechanical Engineering 2, no. 2 (2012): 61–76. http://dx.doi.org/10.4018/ijmmme.2012040104.

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Nanocrystalline ZnO powders are synthesized using a quick, simple and inexpensive combustion method. Glycine and zinc nitrate, used as fuel and oxidant/cation sources respectively, were mixed together at room temperature to form a slurry or gel. A series of experiments were performed to synthesize nanoparticles for different fuel to oxidant ratios. The rate of heating and stirring greatly influenced the combustion process. The as-synthesized powder was heat treated at elevated temperatures for varying time to remove adsorbed impurities from the surface of the ZnO nanoparticles. Both the as-syn

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Adzila, Sharifah, Singh Ramesh, Iis Sopyan, C. Y. Tan, Mohd Hamdi, and W. D. Teng. "Mechanochemical Synthesis of Magnesium Doped Hydroxyapatite: Powder Characterization." Applied Mechanics and Materials 372 (August 2013): 62–65. http://dx.doi.org/10.4028/www.scientific.net/amm.372.62.

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In this study, the mechanochemical method was employed to synthesize hydroxyapatite (HA) and magnesium (Mg) doped hydroxyapatite (HA) powders. The effect of Mg2+ into the synthesized HA powder properties were investigated. Characterization of the synthesized HA and Mg doped HA at various concentrations (1% - 5% MgHA) were accomplished through X-ray diffraction (XRD) and Fourier transform infrared (FTIR) analyses. nanosize of HA and Mg doped HA powders were successfully synthesized through the present method as indicated from the different peaks intensity and adsorption bands obtained in XRD pa

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Kusunose, Takafumi, Nobuaki Sakayanagi, Tohru Sekino, and Yoichi Ando. "Fabrication and Characterization of Aluminum Nitride/Boron Nitride Nanocomposites by Carbothermal Reduction and Nitridation of Aluminum Borate Powders." Journal of Nanoscience and Nanotechnology 8, no. 11 (2008): 5846–53. http://dx.doi.org/10.1166/jnn.2008.261.

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In order to fabricate aluminum nitride/boron nitride (AlN/BN) nanocomposites by pressureless sintering, the present study investigated the synthesis of AlN-BN nanocomposite powders by carbothermal reduction and nitridation of aluminum borate powders. Homogeneous mixtures of alumina (Al2O3), boric acid (H3BO3), and carbon powder were used to synthesize AlN/BN nanocomposite powders containing 10 and 20 vol% BN. Aluminum borate was produced by reacting Al2O3 and B2O3 above 800 °C, and AlN and turbostratic BN (t-BN) were produced by reacting aluminum borate with carbon powder and nitrogen gas at 1

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Eskalen, Hasan, Mikail Aslan, Hakan Yaykaşlı, and Musa Gögebakan. "Synthesis and characterization of Co–B–Fe–Ti nanosized alloyed powders." International Journal of Materials Research 112, no. 1 (2021): 35–41. http://dx.doi.org/10.1515/ijmr-2020-7704.

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Abstract In this study, novel Co60Fe18Ti18B4 alloy powders have been synthesized with high compositional homogeneity using a high-energy ball milling technique. The structural, morphological and mechanical properties of the nanosized alloyed powders were examined using different analytical techniques, including scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectrometry and X-ray diffraction. According to the X-ray diffraction analysis for both Co powder and Co60Fe18Ti18B4 alloy powders, with increasing milling time, the content of Co-based (hcp) solid

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Obradovic, Nina, William Fahrenholtz, Suzana Filipovic, et al. "Characterization of MgAl2O4 sintered ceramics." Science of Sintering 51, no. 4 (2019): 363–76. http://dx.doi.org/10.2298/sos1904363o.

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Single phase MgAl2O4 was made from a one-to-one molar ratio of MgO and Al2O3 powders mixed using ball-milling. Mixtures of MgO and Al2O3 were subsequently treated in planetary ball mill for 30, 60, 90 and 120 minutes in air. The aim of this study was to examine phase composition, microstructure, and densification behavior of sintered specimens. After sintering in dilatometer at 1500?C, the powder was converted to single phase MgAl2O4. The results show that mechanical activation improved the densification behavior of MgAl2O4 sintered specimens, and it reduced the onset temperature for sintering

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Alves, Sérvulo José Ferreira, Marcio Marcelo Sampaio de Sousa, Everthon Rodrigues de Araújo, Francisco Ambrozio Filho, Maurílio José dos Santos, and Oscar Olimpio de Araújo Filho. "Processing of Metal Matrix AA2124 Aluminium Alloy Composites Reinforced by Alumina and Silicon Carbide by Powder Metallurgy Techniques." Materials Science Forum 802 (December 2014): 84–89. http://dx.doi.org/10.4028/www.scientific.net/msf.802.84.

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This work aims the processing of metal matrix AA2124 aluminium alloy composites reinforced by alumina (Al2O3) and silicon carbide (SiC). The composites were manufactured by powder metallurgy techniques, in a grinding using a ball mill spex type (high energy) at a ratio of balls/ powders of 10:1 and grinding time of 30 and 60 minutes using stearic acid (C18H36O2) as lubricant to each one of the samples. The fractions used in both reinforcements were 5, 10 and 15% in mass. The microstructural characterizations of AA2124 alloy powders with the reinforcements of alumina (Al2O3) and silicon carbide

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