The wear resistance of Ni alumina and NiAl2O4 alumina nanocomposites |
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| Affiliation: | 1. School of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, China;2. Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China;1. School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, PR China;2. Chongqing Key Laboratory of Nano Micro Composite Materials and Devices, Chongqing 401331, PR China;3. School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331, PR China;1. Lab for Nanoelectronics and NanoDevices, Department of Electronics Science and Technology, Hangzhou Dianzi University, Hangzhou 310018, China;2. College of Materials and Chemistry, China Jiliang University, Hangzhou 310018, China;3. College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China;1. College of Physics and Electronic Information, Weifang University, Weifang 261061, China;2. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;3. School of Electronic Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China;1. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;2. Key Laboratory of High Energy Density Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610065, China;3. Drilling Technology Division, Exploration and Petroleum Engineering Center-Advanced Research Center (EXPEC ARC), Saudi Aramco, Dhahran 31311, Saudi Arabia;4. Clean Nano Energy Center, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China;5. Chongqing Key Laboratory of Extraordinary Bond Engineering and Advance Materials Technology (EBEAM), School of Materials Science and Engineering, Yangtze Normal University, Chongqing 408100, China;6. Academy for Advanced Interdisciplinary Studies and Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China |
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| Abstract: | The influence of metallic Ni or NiAl2O4 as a reinforcing particle on grain growth and wear resistance in alumina matrix composites was evaluated. Alumina composites with various Ni or NiAl2O4 concentrations were prepared by multiple-infiltrations of Ni-nitrate into bisque-fired (necked) alumina green bodies followed by heat treatment and sintering at 1600 °C for 2 h. Sintering in a reducing environment resulted in composites with metallic Ni nanoparticles, while NiAl2O4 alumina composites were formed when sintering in air. The addition of Ni or NiAl2O4 resulted in a reduction in alumina grain size after sintering. The material response to abrasive wear was estimated by measuring the time to section samples of a defined area using a diamond wafering saw and was compared to the wear resistance of undoped alumina. In both cases, reinforcing alumina with Ni or NiAl2O4 particles resulted in a significant increase in wear resistance, correlated to the reduced grain size. |
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| Keywords: | Ni Nanocomposite Wear Microstructure |
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