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Journal articles on the topic 'Two-layer coating Al2O3/TiN'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Zhu, Lijuan, Chun Feng, Shenglong Zhu, Fuhui Wang, Juntao Yuan, and Peng Wang. "Comparison of CrN, AlN and TiN Diffusion Barriers on the Interdiffusion and Oxidation Behaviors of Ni+CrAlYSiN Nanocomposite Coatings." Crystals 11, no. 11 (2021): 1333. http://dx.doi.org/10.3390/cryst11111333.

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CrN, AlN, TiN layer were prepared as diffusion barriers between the K417 substrate and Ni+CrAlYSiN nano composite coatings via vacuum arc evaporation. Oxidation kinetics and microstructure evaluation of these nano coating systems at 1000 °C after 100 h were studied. Results show that the AlN layer showed good thermodynamic stability, effectively inhibited the interdiffusion between the coating and the substrate, improved the oxidation resistance of Ni+CrAlYSiN nano composite coatings, and a single-layer Al2O3 film was formed on the coating. The CrN layer was decomposed, which did not block the

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2

Major, Łukasz, and Jerzy Morgiel. "TEM Analysis of Wear of Ti/TiN Multi-Layer Coating in Ball-on-Disc Test." Key Engineering Materials 409 (March 2009): 123–27. http://dx.doi.org/10.4028/www.scientific.net/kem.409.123.

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The wear mechanisms of Ti/TiN eight layered coatings ( =250nm) were investigated with ball-on-disc test. The coatings were obtained by hybrid pulsed laser deposition (PLD) technique. The wear test was done using Al2O3 ball-on-disc test at 1N/2000 cycles. Thin foils for TEM observations were cut from wear track using a Quanta 200 3D FIB (Focus Ion Beam) equipped with an Omniprobe lift-up system. The microstructure investigations were performed with the TECNAI G2 SuperTWIN FEG (200kV) transmission electron microscope. At the start of the wear the load applied to Al2O3 ball resulted in pushing-i

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3

Deng, Jiedong, Feng Jiang, Xuming Zha, et al. "Impact Resistance of CVD Multi-Coatings with Designed Layers." Coatings 13, no. 5 (2023): 815. http://dx.doi.org/10.3390/coatings13050815.

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Coated cutting tools are widely used in the manufacturing industry due to their excellent properties of high heat resistance, high hardness, and low friction. However, the milling process is a dynamic process, so the coatings of milling tools suffer severe cyclic impact loads. Impact resistance is important for the life of milling tools. Multi-coatings with different layer thickness may influence their impact resistance, but few studies focus on this topic. In this study, CVD coating with a structure of TiN layer, Al2O3 layer, and TiCN layer was selected as the research objective. Four differe

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Kuang, Hai, Dunqiang Tan, Wen He, Zhiqiang Yi, Zhihang Zou, and Xiaoru Wang. "Oxidation Behavior of Multilayer Hard Coatings (TiCN/Al2O3/TiN) in Process of Recycling Coated Multicomponent Hardmetal Scrap." Materials 11, no. 10 (2018): 1796. http://dx.doi.org/10.3390/ma11101796.

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The coating is one of the biggest problems in the recycling of coated multicomponent hardmetal scraps. The isothermal oxidation behavior of WC-Co multicomponent cemented carbide inserts with a TiCN/Al2O3/TiN hard coating in the recycling process was investigated. The oxidation rate slowed down as the protective coating blocked element diffusion. A rapid oxidation rate was obtained when they were milled into powders and isothermally oxidized at 900 °C. A rapid path for element diffusion was provided by the defects, which were promoted by stress, expansion, and gas volatilization. Both the TiN a

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Chupong, Pudsadee, Mahathep Sukpat, and Karuna Tuchinda. "Characterization and Sliding Wear Behavior of Low-Pressure Cold-Spray Al-Al2O3 and Al-Al2O3/TiN Composite Coatings." Metals 15, no. 1 (2025): 51. https://doi.org/10.3390/met15010051.

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Low-pressure cold-spray (LPCS) aluminum is widely used for coating depositions in various engineering applications but is limited by its low hardness and poor wear resistance. To improve these properties, ceramic particles are added to form metallic matrix composites (MMCs). High-pressure processes can achieve effective MMC coatings but are costly and energy intensive. LPCS has been studied to develop an Al-based MMC at a lower cost. To ensure the adaptation of developed LPCS coating in engineering applications, the behavior of the coating under certain loads needs to be established. This stud

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6

Yoon, Chulsoo, Tae Woo Kim, Osung Seo, and Shinhoo Kang. "Active Metal Brazing for Reliable Ceramic Joints Using TiN Coating." Journal of Materials Research 17, no. 1 (2002): 246–52. http://dx.doi.org/10.1557/jmr.2002.0034.

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To improve the strength of brazed joints, a TiN-coated layer was introduced as an interlayer and reaction barrier for ceramic-ceramic joints. Al2O3, Si3N4, and ZrO2 ceramics were brazed with a Ag–Cu–In–Ti alloy after a TiN coating was applied on the ceramic substrates. The strength of as-brazed and thermally treated Al2O3 specimens with a TiN coating was found to be equivalent to that of bulk Al2O3. However, the Si3N4 and ZrO2 systems showed a significant reduction in joint strength. The difference in the strength can be explained on the basis of the bond strength of the coating, the reaction

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7

Osmond, Luke, Ian Cook, and Tom Slatter. "Tribological Properties of Multilayer CVD Coatings Deposited on SiAlON Ceramic Milling Inserts." Journal of Manufacturing and Materials Processing 7, no. 2 (2023): 67. http://dx.doi.org/10.3390/jmmp7020067.

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This work characterises the structure and mechanical properties, such as adhesion, of two different chemical vapour deposition (CVD) coatings deposited onto silicon aluminium oxynitride (Si3N4 + Al2O3 + Y2O3) round (RNGN) milling cutter tooling inserts. These inserts are often known by the trade abbreviation “SiAlON”. Wear was produced on the inserts using unidirectional sliding (pin-on-disc type) and scratch testing. Two coatings were investigated: a multilayer CVD coating (Coating A) with a composition of TiN + TiCN + Al2O3 and a bilayer coating (Coating B) with a composition of Al2O3 + TiN.

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8

Alghamdi, Abdulaziz S., K. S. Abdel Halim, Mohammed A. Amin, Abdullah S. Alshammari, Naglaa Fathy, and Mohamed Ramadan. "Interfacial Microstructure and Corrosion Behaviour of Mild Steel Coated with Alumina Nanoparticles Doped Tin Composite via Direct Tinning Route." Coatings 11, no. 11 (2021): 1318. http://dx.doi.org/10.3390/coatings11111318.

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The improvement of the surface properties of ferrous metallic materials has become a crucial criterion for advanced engineering applications. The interfacial microstructure and corrosion behaviour of mild steel coated with alumina nanoparticles doped in tin composite using the direct tinning technique were investigated. A coating layer of tin composite containing different loads of Al2O3 nanoparticles (0.25 wt.%, 0.50 wt.%, 1.00 wt.% and 1.5 wt.%) was prepared and directly deposited on a mild steel substrate. This type of a direct tinning process is considered to be a simple and low-cost route

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9

Britchi, Mirela, Niculae Ene, Mircea Olteanu, and Constantin Radovici. "Titanium diffusion coatings on austenitic steel obtained by the pack cementation method." Journal of the Serbian Chemical Society 74, no. 2 (2009): 203–12. http://dx.doi.org/10.2298/jsc0902203b.

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The surface of specimens made of 316L austenitic steel was modified by titanium diffusion. The diffusion coatings were obtained by packing in a powder mixture consisting of titanium powder, NH4Cl and Al2O3 powder. The procedure required high temperatures, over 900 ?C, and long durations. Atomic titanium was formed in the muffle during the process. Titanium atoms from the metallic part surfaces diffuse towards the interior and a diffusion layer is formed as a function of the steel composition. Titanium diffusion into the surface of 316L austenitic steel determines the formation of a complex coa

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10

Pandey, Kshitij, and Saurav Datta. "Dry Machining of Inconel 825 Superalloys." International Journal of Manufacturing, Materials, and Mechanical Engineering 11, no. 4 (2021): 26–39. http://dx.doi.org/10.4018/ijmmme.2021100102.

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The present work investigates application feasibility of PVD TiN/TiCN/TiN coated cermet and CVD Al2O3/TiCN coated SiAlON for dry machining of Inconel 825 superalloy. Machining performance is interpreted through cutting force magnitude, tool-tip temperature, and mechanisms of tool wear. Results are compared to that of CVD multi-layer TiN/TiCN/Al2O3/TiN coated WC-Co tool. It is evidenced that SiAlON tool generates lower cutting force but experiences higher tool-tip temperature than other two counterparts. Apart from abrasion and adhesion, carbide tool witnesses coating peeling and ploughing. In

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11

Fu, Guangyan, Yongzhao Wu, Qun Liu, Rongguang Li, and Yong Su. "Hot Corrosion Behavior of Stainless Steel with Al-Si/Al-Si-Cr Coating." High Temperature Materials and Processes 36, no. 3 (2017): 243–48. http://dx.doi.org/10.1515/htmp-2015-0154.

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AbstractThe 1Cr18Ni9Ti stainless steel with Al-Si/Al-Si-Cr coatings is prepared by slurry process and vacuum diffusion, and the hot corrosion behavior of the stainless steel with/without the coatings is studied under the condition of Na2SO4 film at 950 °C in air. Results show that the corrosion kinetics of stainless steel, the stainless steel with Al-Si coating and the stainless steel with Al-Si-Cr coating follow parabolic laws in several segments. After 24 h corrosion, the sequence of the mass gain for the three alloys is the stainless steel with Al-Si-Cr coating < the stainless steel with

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12

Donkov, N., A. Zykova, V. Safonov, S. Dudin, S. Yakovin, and D. Dimov. "Structural and mechanical properties of magnetron-sputtering-deposited Ta- and Al- based coatings – a comparative analysis." Journal of Physics: Conference Series 2487, no. 1 (2023): 012039. http://dx.doi.org/10.1088/1742-6596/2487/1/012039.

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Abstract A comprehensive evaluation of the structure and the nano-mechanical characteristics of single and two-layer nano-structured coatings AlN/Al2O3, TaN/Ta2O5 grown on the surface of metallic materials. The formation of a two-layer structure improves the mechanical and tribological properties of the coating-substrate system, such as the plastic deformation resistance and anti-wear performance. The results indicate that the proposed two-layer nanostructured nitride-oxide coatings based on aluminum and tantalum are promising candidates for biomedical applications.

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Víctor, Alcántara Alza. "Coated Tungsten Carbide Inserts: Effects on Machinability in Turning of AISI 1020 Steel." International Journal of Recent Technology and Engineering (IJRTE) 9, no. 4 (2020): 406–15. https://doi.org/10.35940/ijrte.D5026.119420.

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How the different types of cutting inserts coatings influence on surface roughness and tool wear, taking these two factors as machinability criteria, in turning carbon steel bars AISI 1020 was investigated. Specimens of 36 mm in diameter and 200 mm in length tested were made. Uncoated inserts and coated WC tungsten carbide inserts with: TiN; TiN / Al2O3 and TiC / Al2O3 / TiN, were use. The tests were carried out on automatic parallel lathe, using the cutting parameters: 1500 rpm; a= 0,25 mm/rev; p= 0,4 mm; therefore, the cutting speed was Vc= 170 m/min. Roughness was measured in the roughness

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14

Liu, Hong Wei, Sheng Zhu, and Feng Liang Yin. "SHS Reactive Arc Spray - A New Method to Prepare Multiphase Ceramic Coatings." Materials Science Forum 789 (April 2014): 518–21. http://dx.doi.org/10.4028/www.scientific.net/msf.789.518.

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Ti (C,N)-TiB2-Al2O3 multiphase ceramic coatings were in-situ synthesized on a steel substrate by SHS reactive arc spray technique. The composition and microstructure of the coatings were characterized by X ray diffraction, scanning electron microscopy and energy dispersive spectrometry. The results showed that multiphase ceramic coatings, composed of TiB2, TiB, TiC0.3N0.7, TiN, Al2O3 and AlN, can be prepared with the reactive cored wires by SHS reactive arc spray. The coatings exhibit the typical layer microstructure, with discrete second phases distributed in the continuous base phase. The bo

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15

Данилова, Л. М., та О. І. Лисак. "Вплив зносу інструменту на шорсткість поверхні при токарному обробленні". Інновації молоді в машинобудуванні, № 3 (2 червня 2021): 427–30. http://dx.doi.org/10.20535/2708-3926.2021.3.229668.

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У даній роботі була досліджена токарна обробка з точки зору якості поверхні заготовки і зносу різальних інструментів. Дослідження показує взаємозв'язок між вихідними і вхідними параметрами, такими як подача, радіус при вершині пластини і метод нанесення покриття. Обрані методи нанесення покриття – це методи MT-CVD і PVD і, крім цього, розглядалась роль різних матеріалів покриття – багатошарову покриття TiCN / Al2O3 / TiN і одношарове TiAlN на карбідній основі. In this work, turning in terms of surface quality of the workpiece and wear of cutting tools was investigated. The study shows th

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16

Terek, Pal, Lazar Kovačević, Vladimir Terek, et al. "Surface Roughness and Its Effect on Adhesion and Tribological Performance of Magnetron Sputtered Nitride Coatings." Coatings 14, no. 8 (2024): 1010. http://dx.doi.org/10.3390/coatings14081010.

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Reports of the influence of surface roughness on the adhesion and tribological performance of contemporary nitride coatings with different layer designs are still scarce in the literature. Therefore, in this study, we evaluated the behavior of a single-layer TiAlN, a bilayer TiAlN/CNx, and a nanolayer AlTiN/TiN coating. Coatings were deposited in an industrial magnetron sputtering unit on the substrates of EN 100Cr6 steel, prepared to four degrees of surface roughness (Sa = 10–550 nm). The coatings’ adhesion was determined by scratch tests performed perpendicular and parallel to the machining

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17

Zhu, Xiao Dong, Hai Lin Dou, Zhi Gang Ban, Yi Xiong Liu, and Jia Wen He. "Structure of Alumina Layer on the Damage Resistance of Multilayered CVD Coating under Repeated Impact Loading." Key Engineering Materials 373-374 (March 2008): 113–16. http://dx.doi.org/10.4028/www.scientific.net/kem.373-374.113.

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Repeated impact test is an appropriate way to evaluate coating properties of metal cutting tools since the cyclic impact loading applied in the test simulates the interrupted cutting process. For hard CVD coatings with multi-layered structure, the alumina is usually of the lowest toughness and adhesion, and relatively easy to fail in the metal cutting. In the present paper, multilayered coatings consisting medium temperature TiCN, Al2O3 and TiN were deposited by chemical vapor deposition (CVD) on the tungsten carbide/cobalt substrate and evaluated using scratch adhesion test and repeated impac

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18

Almohammedi, Abdullah, Mohamed Shaban, Huda Mostafa, and Mohamed Rabia. "Nanoporous TiN/TiO2/Alumina Membrane for Photoelectrochemical Hydrogen Production from Sewage Water." Nanomaterials 11, no. 10 (2021): 2617. http://dx.doi.org/10.3390/nano11102617.

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An aluminum oxide, Al2O3, template is prepared using a novel Ni imprinting method with high hexagonal pore accuracy and order. The pore diameter after the widening process is about 320 nm. TiO2 layer is deposited inside the template using atomic layer deposition (ALD) followed by the deposition of 6 nm TiN thin film over the TiO2 using a direct current (DC) sputtering unit. The prepared nanotubular TiN/TiO2/Al2O3 was fully characterized using different analytical tools such as X-ray diffraction (XRD), Energy-dispersive X-ray (EDX) spectroscopy, scanning electron microscopy (SEM), and optical U

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Tkachuk, O. V., V. M. Hvozdetskyi, M. M. Student, Kh R. Zadorozhna, I. V. Kovalchuk, and I. M. Pohrelyuk. "Structural features and wear resistance of the TiAlN coating formed on the Ti–6Al–4V alloy by combining electric arc spraying and gas nitriding methods." Physicochemical Mechanics of Materials 60, no. 4 (2024): 60–67. https://doi.org/10.15407/pcmm2024.04.060.

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The formation of the TiAlN coating on Ti–6Al–4V alloy by combination of the arc spraying and gas nitriding methods was investigated. It was established that the TiAlN phase is formed in the coating during gas nitriding of the titanium alloy with a pre-sprayed layer of aluminum and titanium. By increasing nitriding temperature from 650 to 850°C, the content of the TiAlN phase decreased. The TiAlN coating significantly increases the surface hardness of the alloy (up to 12–15 GPa), and in a tribo-pair with Al2O3 provides significantly higher wear resistance compared to the TiN coating and untrea

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Li, Yanyan, Shuai Li, Chao Zhang, Na Xu, and Zebin Bao. "Oxidation Behavior and Oxide Transformation of a Pt-Modified Aluminide Coating at Moderate High Temperature." Crystals 11, no. 8 (2021): 972. http://dx.doi.org/10.3390/cryst11080972.

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The oxidation performance of a single-phase Pt-modified aluminide coating was assessed in oxidation test at 980 °C in comparison with the single crystal superalloy. The results suggested that the Pt-modified aluminide coating exhibited superior oxidation resistance. During oxidation, the oxide scale formed on bare alloy changed constantly followed by the constitution of the multi-layer scale structure: An outer scale mainly consisted of Cr2O3 + NiCr2O4 + TiO2 with scarce protection, and an internal scale mainly consisted of Al2O3. The thickness of the outer oxide scale increased with time, whe

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Zhu, Maoxiang, Soufyane Achache, Mariane Prado Motta, et al. "Characteristics and Cutting Performance of CVD Al2O3 Multilayer Coatings Deposited on Tungsten Carbide Cutting Inserts in Turning of 24CrMoV5-1 Steel." Coatings 13, no. 5 (2023): 883. http://dx.doi.org/10.3390/coatings13050883.

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In this work, TiN/Ti(C,N)/Al2O3 multilayer coatings were deposited using an industrial-scale thermal CVD system. Two polymorphs of Al2O3, the stable α- and the metastable κ-Al2O3, were obtained by the deposition of specific bonding layers at the Al2O3/Ti(C,N) interface. The comparable hardness and elastic moduli of α- and κ-Al2O3 multilayer coatings were measured. The tribological behavior of Al2O3 multilayer coatings was studied at room temperature using 24CrMoV5-1 balls; friction coefficients were comparable for both α- and κ-Al2O3 multilayer coatings. As a result of the relatively high hard

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22

Sayed, Farheen N., Erik Björklund, Adam J. Lovett, et al. "Evolution of Phases at the Surface and Interface of Mn Based Spinel Cathode with Coating Layer - a Spectroscopic Investigation." ECS Meeting Abstracts MA2023-02, no. 5 (2023): 827. http://dx.doi.org/10.1149/ma2023-025827mtgabs.

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Surface modifications, commonly termed coatings or artificial interphases, are known to mitigate secondary reactions of charged cathodes with organic electrolyte and limit surface reconstruction. As a result, better electrochemical stability has been observed for coated cathodes in both liquid and solid electrolyte-based Li ion batteries (LIBs). However, these coatings, in contact with electrolyte, can be dynamic and evolve during processing stages or electrochemical cycling. In this work we investigate the interphases between spinel cathodes and two coating layers, LiNbO3 and Al2O3. The spine

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Davoudinejad, Ali, Sina Alizadeh Ashrafi, and Mohsen Marani Barzani. "Investigation into Different Tool Coating performance While Turning Al6061." Advanced Materials Research 566 (September 2012): 443–47. http://dx.doi.org/10.4028/www.scientific.net/amr.566.443.

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Cutting tool material technology in recent years has made great strides with substantial improvements in their strength, toughness, and wears resistance, which are designed to increase productivity, improve tool selection and aid to decrease costs and promote machining quality. This investigation presents the effect of various cutting speeds in turning of Al6061 with respect to different coatings. Experiments carried out under orthogonal dry cutting, and two different cutting speeds applied which were 250, 500 m/min. Feed rate and depth of cut kept constant respectively at 0.05 mm/rev and 0.5

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Cho, S. S., and K. Komvopoulos. "Cutting Force Variation Due to Wear of Multi-Layer Ceramic Coated Tools." Journal of Tribology 120, no. 1 (1998): 75–81. http://dx.doi.org/10.1115/1.2834193.

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Cutting forces were measured during turning AISI 4340 steel with uncoated, two-layer coated (TiC/Al2O3), and three-layer coated (TiC/Al2O3/TiN) cemented WC-Co inserts possessing chip-breaker grooves in order to investigate the progression of tool wear. The variations of cutting force signals are interpreted in light of predominant wear mechanisms. A characteristic feature of wearing coated tools is shown to be the rapid increase of the radial and axial cutting forces when the tool life is reached. This behavior is associated with both the increase of the real contact area on the nose and the f

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Li, Peng, Xingzhen Yan, Jiangang Ma, Haiyang Xu, and Yichun Liu. "Highly Stable Transparent Electrodes Made from Copper Nanotrough Coated with AZO/Al2O3." Journal of Nanoscience and Nanotechnology 16, no. 4 (2016): 3811–15. http://dx.doi.org/10.1166/jnn.2016.11879.

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Due to their high flexibility, high conductivity and high transparency in a wide spectrum range, metal nanowires and meshes are considered to be two of the most promising candidates to replace the traditional transparent conducting films, such as tin doped indium oxide. In this paper, transparent conducting films made from copper nanotroughs are prepared by the electrospinning of polymer fibers and subsequent thermal evaporation of copper. The advantages of the technique include low junction resistance, low cost and low preparation temperature. Although the copper nanotrough transparent conduc

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Szindler, M., L. A. Dobrzański, M. M. Szindler, M. Pawlyta, and T. Jung. "Comparison of surface morphology and structure of Al2O3 thin films deposited by sol-gel and ALD methods." Journal of Achievements in Materials and Manufacturing Engineering 2, no. 82 (2017): 49–57. http://dx.doi.org/10.5604/01.3001.0010.2354.

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Purpose: of this research was examination Al2O3 thin film obtained with two different method, by sol-gel and ALD, and comparison the surface morphology and structure of deposited thin films. The films deposited on the monocrystalline silicon were tested for their suitability for use in silicon solar cells. Design/methodology/approach: Trimethylaluminum (TMA) was used as a precursor of Al2O3 which is reacted with water enabled the deposition of thin films by ALD method. By the sol-gel method the aluminium tri-sec butoxide (TBA) was used as a precursor to obtain Al2O3 thin films. The aluminium o

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Cho, S. S., and K. Komvopoulos. "Correlation Between Acoustic Emission and Wear of Multi-Layer Ceramic Coated Carbide Tools." Journal of Manufacturing Science and Engineering 119, no. 2 (1997): 238–46. http://dx.doi.org/10.1115/1.2831100.

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Acoustic emission (AE) was used to monitor the machining process and tool condition during turning of AISI 4340 steel with uncoated, two-layer (TiC/Al2O3) coated, and three-layer (TiC/Al2O3/TiN) coated cemented WC-Co tools. The experiments were performed at four different feedrates and constant cutting speed and depth of cut. The variation of the AE signal with cutting time is interpreted in light of the dominant mechanisms, rates, and patterns of wear and the contact friction conditions at the tool/workpiece and tool/chip interfaces. Correlations between intrinsic frequencies and AE sources a

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Buketov, Andriy, Oleksandr Sapronov, Mykola Brailo, et al. "The Use of Complex Additives for the Formation of Corrosion- and Wear-Resistant Epoxy Composites." Advances in Materials Science and Engineering 2019 (August 20, 2019): 1–5. http://dx.doi.org/10.1155/2019/8183761.

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The corrosion resistance and hydroabrasive resistance of the developed epoxy composite coatings are investigated in this paper. The analysis of the penetration index change after τ = 50–150 days of immersion in a water medium and 10% sulfuric acid solution is carried out. The optimal ratio of the modifier and nanodispersed (Si3N4, Al2O3, AlN, and TiN) and fibrous (viscose, polyamide, matka silk, rong, and cashmere) fillers in the epoxy binder is determined. It was allowed to slow down the process of electrochemical reaction on the metal surface. The penetration of aggressive media in such a co

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Ning, Honglong, Junlong Chen, Zhihang Li, et al. "High-Stability Silver Nanowire–Al2O3 Composite Flexible Transparent Electrodes Prepared by Electrodeposition." Nanomaterials 11, no. 11 (2021): 3047. http://dx.doi.org/10.3390/nano11113047.

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Silver nanowire (AgNW) conductive film fabricated by solution processing was investigated as an alternative to indium tin oxide (ITO) in flexible transparent electrodes. In this paper, we studied a facile and effective method by electrodepositing Al2O3 on the surface of AgNWs. As a result, flexible transparent electrodes with improved stability could be obtained by electrodepositing Al2O3. It was found that, as the annealing temperature rises, the Al2O3 coating layer can be transformed from Al2O3·H2O into a denser amorphous state at 150 °C. By studying the increase of electrodeposition tempera

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Brito, Rogério Fernandes, Ricardo Luiz Perez Teixeira, Rafael Thomaz de Camargo Rodrigues, et al. "Numerical Analysis of the Thermal Influence of Conduction and Contact Thermal Resistance in Multi-Layered Cutting Tool." Acta Scientiarum. Technology 47, no. 1 (2025): e71286. https://doi.org/10.4025/actascitechnol.v47i1.71286.

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During the turning process, the cutting tool heats up during use, potentially reaching temperatures above 900ºC. When these temperature levels are reached, the cutting tool loses its mechanical properties and wears out prematurely. To address this issue, a solution was found in coating the cutting tool with a thin layer of thermally insulating material. The purpose of this work was to numerically simulate the heating phenomenon in the transient regime of a tool and tool holder set while considering the presence of the coating, as well as to evaluate heat exchange by conduction. Another factor

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Cho, S. S., and K. Komvopoulos. "Wear Mechanisms of Multi-Layer Coated Cemented Carbide Cutting Tools." Journal of Tribology 119, no. 1 (1997): 8–17. http://dx.doi.org/10.1115/1.2832485.

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Turning experiments were performed with cemented WC-Co cutting tools coated with two-layer and three-layer overcoats of TiC/Al2O3 and TiC/Al2O3/TiN, respectively. For comparison, uncoated WC-Co tools were also tested under similar cutting conditions. The predominant wear mechanisms of the various ceramic overcoats and cemented WC-Co were investigated using surface profilometry, scanning electron microscopy, and energy dispersive X-ray analysis. Representative results of the tool wear behavior are presented, and the significance of each ceramic layer on the overall tool wear resistance is inter

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Kong, Ji-Zhou, Liang Yin, Yan Xuan, Ai-Dong Li, Qian-Zhi Wang, and Fei Zhou. "Atomic Layer-Deposited Al2O3 Interlayer for Improved Tribological and Anti-corrosion Properties of TiN Hard Coating on 316L Stainless Steel." Journal of Materials Engineering and Performance 28, no. 11 (2019): 7058–67. http://dx.doi.org/10.1007/s11665-019-04427-y.

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Trivinho-Strixino, Francisco, Adriana O. Delgado-Silva, Janaina S. Santos, Andressa Rodrigues, Giovanni P. Mambrini, and Mariana S. Sikora. "Anodization Time Effect on Silver Particles Deposition on Anodic Oxide Coating over Al Produced by Plasma Electrolytic Oxidation." Plasma 6, no. 2 (2023): 235–49. http://dx.doi.org/10.3390/plasma6020018.

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In this study, 6061 Al alloy was galvanostatically anodized under the Plasma Electrolytic Oxidation (PEO) condition. A factorial design of 22 was carried out using two variables (anodization time and presence of silver in the electrolyte) on two levels, i.e., 20 and 60 min of anodization and the absence/presence of silver ions in the electrolyte. The Al anodization was performed in sodium silicate electrolyte, applying a constant current density of 20 mA cm−2. The oxide characterization was performed by Scanning Electron Microscopy (SEM), surface roughness analysis (RMS), Energy Dispersive Spe

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Choudhury, Imtiaz Ahmed, S. W. Gan, and Nukman Yusoff. "Experimental Determination of Cutting Temperature and Force when Turning Assab Steel with Coated Carbide Inserts." Advanced Materials Research 83-86 (December 2009): 993–1001. http://dx.doi.org/10.4028/www.scientific.net/amr.83-86.993.

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The study is about an experimental investigation of the different factors influencing the temperature occurring at the coating/substrate and chip interface when machining Assab steels 760 and DF2 with two different coated carbide tools. Results show that tool temperature was higher when turning Assab steel 760. Temperature along the major flank face was higher that that at the minor flank. However, the magnitude of temperature was lower than expected with maximum only around 260 oC near the tool tip. The performance of Al2O3 coated WC inserts appeared to be better compared to TiN coated WC ins

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Kaczmarek, Ł., M. Steglinski, J. Sawicki, et al. "Optimization of the Heat Treatment and Tribological Properties of 2024 and 7075 Aluminium Alloys." Archives of Metallurgy and Materials 58, no. 2 (2013): 535–40. http://dx.doi.org/10.2478/amm-2013-0032.

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This paper describes two stages of optimization of the properties of 2024 and 7075 aluminium alloys, in particular their resistance to pitting by first T6, T6I6 or T6I4 treatment, and second increase its tribological properties by depositing by RF PACVD method a gradient coating of high adhesion to the substrate. Quantitative microstructural characteristics reveals that it is possible to increase hardness (up to 190HV for 7075 alloy) with relatively high yield strength (520 MPa) and high ultimate elongation (about 20%) by optimizing dispersion of precipitates using two-stage artificial aging p

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Cooke, Kavian Omar, Muhammad Ali Shar, and Suleman Hussain. "Micro-Alloying and Surface Texturing of Ti-6Al-4V Alloy by Embedding Nanoparticles Using Gas Tungsten Arc Welding." Journal of Manufacturing and Materials Processing 4, no. 2 (2020): 29. http://dx.doi.org/10.3390/jmmp4020029.

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Titanium alloy Ti-6Al-4V is known for both its excellent mechanical properties and its low surface hardness. This study explores a two-step process for depositing a hard nanocrystalline coating onto the surface of the Ti-alloy, followed by surface melting, which embeds hard nanoparticles into a thin surface layer of the alloy. The treated surface layer was studied using X-ray diffraction, scanning electron microscopy, and Vicker’s micro-hardness testing. The results of the study show that the surface of the Ti-6Al-4V alloy can be successfully hardened by embedding nanosized Al2O3 particles int

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Shin, Seung Ho, Jun-Sik Park, Hojae Lee, et al. "Fabrication of Scandia-Stabilized Zirconia Thin Films by Instant Flash Light Irradiation." Coatings 10, no. 1 (2019): 9. http://dx.doi.org/10.3390/coatings10010009.

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In this study, scandia-stabilized zirconia (ScSZ) electrolyte thin-film layers were deposited via chemical solution deposition (CSD). We selected 10ScSZ (10% Sc 2 O 3 , 90% ZrO 2 molar ratio) as the target material, and the precursor solution was prepared by precise calculations. The 10ScSZ solution was deposited on Al2O3 substrate using a spin-coating method. Then, the substrate was sintered using two methods: flash light irradiation and thermal. The characteristics of the thin films were compared, including ionic conductivity, surface morphology, and chemical composition. Pulsed light sinter

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Guo, Jing Kun, Hua Min Kou, and Yu Bai Pan. "The Thinking on Multiphase Materials." Key Engineering Materials 351 (October 2007): 233–37. http://dx.doi.org/10.4028/www.scientific.net/kem.351.233.

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The main problems for multiphase materials are the even mixing and the bonding or reacting among two or more phases, as well as the states of their grain boundaries. The mixing of two phases is usually effective by using liquid medium. The technology of second phase coating for the original particles or so call nucleo-shell structure is a well approach for the even mixing. For ceramic matrix multiphase materials low sintering temperature is the effective way to avoid the occurring of reaction between different phases. The design of grain boundary and its stress is important for their bonding s

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Sanroman Gutierrez, Kenzie Marie, Sanzeeda Baig Shuchi, Yi Cui, and Stacey F. Bent. "Using Nanoscale Metal Oxide Films to Investigate the Influence of Anode Interfaces on Lithium Battery Performance." ECS Meeting Abstracts MA2024-01, no. 2 (2024): 349. http://dx.doi.org/10.1149/ma2024-012349mtgabs.

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As renewable energy and battery-powered technologies become more widespread, high energy-density and high-performing batteries are required to meet society’s needs. While lithium-ion batteries have been the staple, their energy density development has been slow, and at gravimetric energy densities of around 250 Wh/kg, they are approaching their theoretical limit.1 The lithium-metal battery (LMB) is considered a next-generation battery due to high theoretical energy densities (ex: Lithium-Sulfur, 2600 Wh/kg), and lithium metal’s high gravimetric capacity (3860 mAh/g) and low reduction potential

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Feng, Yuxi, Ming Liu, Lei Jia, et al. "Study on the Corrosion Resistance of Supersonic Plasma Spraying Al2O3 Thin Layer and SiO2 Sealer Alternately Deposited Coating." Coatings 14, no. 1 (2024): 78. http://dx.doi.org/10.3390/coatings14010078.

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The longevity of thermally sprayed ceramic coatings is often difficult to achieve in corrosive environments. In this paper, an alternating sealing coating technology was used to seal supersonic plasma sprayed Al2O3 coatings. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to characterize the coating microstructure of Al2O3 coatings and seal coats. The corrosion behavior of alternating sealing coating, traditional sealed coating, and spray coating at 5 wt.% NaCl was studied by the electrochemical test method (dynamic polarization) and immersion corrosion experiments. Th

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Hashemzadeh, Mehri, Keyvan Raeissi, Fakhreddin Ashrafizadeh, Amin Hakimizad, Monica Santamaria, and Thomas Lampke. "Silicate and Hydroxide Concentration Influencing the Properties of Composite Al2O3-TiO2 PEO Coatings on AA7075 Alloy." Coatings 12, no. 1 (2021): 33. http://dx.doi.org/10.3390/coatings12010033.

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This work evaluates the effect of sodium meta-silicate pentahydrate (SMS) and potassium hydroxide concentrations on properties of Al2O3-TiO2 coatings produced through plasma electrolytic oxidation in a solution containing 3 g L−1 potassium titanyl oxalate, (PTO), using a unipolar waveform with constant current density. The surface and cross-section characteristics of PEO coatings including morphology, elemental distribution, and phase composition were evaluated using FESEM, EDS, and XRD techniques. Voltage-time response indicated the concentration of SMS and KOH had a significant effect on the

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Agüero, Alina, Krystina Spiradek, S. Höfinger, Marcos Gutiérrez, and Raúl Muelas. "Microstructural Evolution of Slurry Fe Aluminide Coatings during High Temperature Steam Oxidation." Materials Science Forum 595-598 (September 2008): 251–59. http://dx.doi.org/10.4028/www.scientific.net/msf.595-598.251.

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Slurry iron aluminide coatings are very resistant to steam oxidation at 600-650º C. These coatings can be used to protect new generation Ultra Super Critical (USC) steam power plant ferritic/martensitic steel components. The microstructure of the initially deposited coating changes as a function of time, mainly due to coating-substrate interdiffusion, going from mostly Fe2Al5 to FeAl, causing the precipitation of AlN in those substrates containing a minimum content of N and moreover, developing Kirkendall porosity at the coating-substrate interface. Steam oxidation at 650º C causes the formati

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Gembaczka, P., M. Görtz, Y. Celik, et al. "Encapsulation of implantable integrated MEMS pressure sensors using polyimide epoxy composite and atomic layer deposition." Journal of Sensors and Sensor Systems 3, no. 2 (2014): 335–47. http://dx.doi.org/10.5194/jsss-3-335-2014.

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Abstract. Implantable MEMS sensors are an enabling technology for diagnostic analysis and therapy in medicine. The encapsulation of such miniaturized implants remains a largely unsolved problem. Medically approved encapsulation materials include titanium or ceramics; however, these result in bulky and thick-walled encapsulations which are not suitable for MEMS sensors. In particular, for MEMS pressure sensors the chip surface comprising the pressure membranes must be free of rigid encapsulation material and in direct contact with tissue or body fluids. This work describes a new kind of encapsu

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Minquiz, Gustavo M., N. E. González-Sierra, Javier Flores Méndez, et al. "Analysis of Wear Mechanisms Under Cutting Parameters: Influence of Double Layer TiAlN/TiN PVD and TiCN/Al2O3 Chemical Vapor Deposition-Coated Tools on Milling of AISI D2 Steel." Coatings 14, no. 12 (2024): 1491. http://dx.doi.org/10.3390/coatings14121491.

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Tool selection is relevant because a wide variety of materials exhibit different machinability behaviors. Tool life during manufacturing is commonly associated with productivity. Insert developers have been using coatings on cutting tools to enhance their performance, with chemical vapor deposition (CVD) and physical vapor deposition (PVD) being the two most used techniques. This study analyzed the cutting tool wear mechanism by machining AISI D2 steel using two different inserts of TiAlN/TiN PVD and TiCN/Al2O3 CVD as layers deposited on a carbide substrate. The two inserts were tested at thre

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Ci, Shiwei, Ting Wang, Jiaqi Hu, et al. "Microstructure and Properties of Al-Based Ceramic Coating Deposited on Magnesium Alloy Surface by Cold Spraying." Coatings 13, no. 4 (2023): 779. http://dx.doi.org/10.3390/coatings13040779.

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In this study, pure Al and Al-Al2O3 composite coatings with a low porosity and high density were prepared on magnesium alloys by cold spraying. The surface morphology, component, hardness, interfacial bonding, wear and corrosion properties were investigated. Additionally, the relationship between the interface structure and the protective coatings’ quality was preliminarily established. Pure Al powder was used to create a coating with a homogeneous and dense microstructure. The hard-phase Al2O3 in the composite coatings was non-oxidized and would reduce the porosity of the coatings to improve

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Wang, Shaoqing, Wei Ji, Yaru Wang, et al. "Comparative Study of Corrosion Behavior of LPCVD-Ti0.17Al0.83N and PVD-Ti1−xAlxN Coatings." Coatings 12, no. 6 (2022): 835. http://dx.doi.org/10.3390/coatings12060835.

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In the present work, a low-pressure chemical vapor deposition (LPCVD) Ti0.17Al0.83N and state-of-the-art arc ion plating PVD-Ti1−xAlxN (x = 0.25, 0.55, 0.60, 0.67) coatings were deposited on cemented carbide substrate. The morphological, structural, and electrochemical properties of LPCVD-Ti0.17Al0.83N and PVD-Ti1−xAlxN coatings were compared. The X-ray diffraction (XRD) results and scanning electron microscopy (SEM) images revealed that the LPCVD-Ti0.17Al0.83N coating had a face-centered cubic (fcc) structure, while presenting a crack-free surface morphology and a compressive residual stress

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Gatzen, Caren, Daniel Emil Mack, Olivier Guillon, and Robert Vaßen. "YAlO3—A Novel Environmental Barrier Coating for Al2O3/Al2O3–Ceramic Matrix Composites." Coatings 9, no. 10 (2019): 609. http://dx.doi.org/10.3390/coatings9100609.

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Ceramic matrix composites (CMCs) are promising materials for high-temperature applications. Environmental barrier coatings (EBCs) are needed to protect the components against water vapor attack. A new potential EBC material, YAlO3, was studied in this paper. Different plasma-spraying techniques were used for the production of coatings on an alumina-based CMC, such as atmospheric plasma spraying (APS) and very low pressure plasma spraying (VLPPS). No bond coats or surface treatments were applied. The performance was tested by pull–adhesion tests, burner rig tests, and calcium-magnesium-aluminum

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Van Dongen, Kaat, Rachel A. Nye, Jan-Willem J. Clerix, Claudia Sixt, Danilo De Simone, and Annelies Delabie. "Aminosilane small molecule inhibitors for area-selective deposition: Study of substrate-inhibitor interfacial interactions." Journal of Vacuum Science & Technology A 41, no. 3 (2023): 032404. http://dx.doi.org/10.1116/6.0002347.

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Area-selective atomic layer deposition (AS-ALD) is a coveted method for the fabrication of next-generation nano-electronic devices, as it can complement lithography and improve alignment through atomic scale control. Selective reactions of small molecule inhibitors (SMIs) can be used to deactivate growth on specific surface areas and as such enable AS-ALD. To investigate new applications of ASD, we need insight into the reactions of SMIs with a broad range of technology relevant materials. This paper investigates the reactions of aminosilane SMIs with a broad range of oxide surfaces and the im

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Hou, Ping, S. N. Basu, and V. K. Sarin. "Nucleation mechanisms in chemically vapor-deposited mullite coatings on SiC." Journal of Materials Research 14, no. 7 (1999): 2952–58. http://dx.doi.org/10.1557/jmr.1999.0395.

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Dense, uniform, and adherent chemically vapor-deposited mullite coatings were deposited on SiC substrates using the AlCl3–SiCl4–H2–CO2 system. Typical coating morphology consisted of a thin interfacial layer of γ–Al2O3 nanocrystallites embedded within a vitreous SiO2-based matrix. When a critical Al/Si ratio of 3.2 ± 0.29 was reached within this nanocrystalline layer, mullite crystals nucleated and grew as columnar grains. The thickness of the nanocrystalline layer decreased as the input AlCl3/SiCl4 ratio was increased. In all cases, the Al/Si composition in the coating increased from the coat

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Pinto, Gustavo Filipe, Andresa Baptista, Vitor F. C. Sousa, Francisco J. G. Silva, Manuel Evaristo, and Filipe Fernandes. "Study on the Wear Modes of PVD Films Using Different Concentrations of Al2O3 Abrasive Particles and Textured Rotating Balls." Coatings 13, no. 3 (2023): 628. http://dx.doi.org/10.3390/coatings13030628.

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Abrasive wear is a wear mechanism that results in a loss of material from the interaction of a surface with hard particles. This type of wear is frequently found in the surface of machining tools. Microscale abrasion equipment is often used to characterize the resistance to abrasive wear of a surface. The different parameters able to control micro-abrasion wear tests, such as ball rotation, sliding distance between ball and surface sample, abrasive slurry concentration, normal load acting on the sample, and abrasive flow rate over the sample, have been widely studied. The combination of differ

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