Effect of TZP nanoparticles synthesized by RCVD on mechanical properties of ZTA composites sintered by SPS |
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| Affiliation: | 1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;2. Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, China;3. Center for Materials Research and Analysis, Wuhan University of Technology, Wuhan 430070, China;4. New Industry Creation Hatchery Center, Tohoku University, Sendai 980-8577, Japan;5. Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Chaozhou 521000, China;6. Wuhan University of Technology Advanced Engineering Technology Research Institute of Zhongshan City, Xiangxing Road 6, Zhongshan 528400, China;1. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China;2. School of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China;1. Department of Materials Science and Engineering, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan;2. Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan;1. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China;2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;1. Ioffe Institute, 26 Politekhnicheskaya Street, St. Petersburg 194021, Russia;2. Saint Petersburg State Institute of Technology, 26 Moskovsky Prospect, St. Petersburg 190013, Russia;3. Joint Stock Company “Neva-Ferrite”, 50 Svobody Street, St. Petersburg 198320, Russia;1. Department of Mechanical Engineering, The University of Akron, Akron, OH, USA;2. AlphaSTAR Corporation, Long Beach, CA, USA;3. NAVAIR, Patuxent River, MD, USA |
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| Abstract: | Alumina is an engineering ceramic material with excellent comprehensive properties as well as the inherent shortcoming of the low fracture toughness. Y2O3-stabilized t-ZrO2 (TZP) is an effective additive to improve its fracture toughness. In this work, rotary chemical vapor deposition (RCVD) was applied to uniformly coat TZP nanoparticles on α-Al2O3 powder, and then the powder was compacted via spark plasma sintering. The content of TZP increased from 0.56 to 4.7 wt% with increasing the deposition temperature from 500 to 800 °C but decreased at 900 °C. The RCVD-TZP nanoparticles homogeneously surrounded the α-Al2O3 grains and inhibited its growth after sintering. The relative density, fracture toughness and hardness of the ZTA composites had the maximum values of 99.2%, 7.28 ± 0.33 MPa m1/2, and 19.5 ± 0.5 GPa at 1500 °C and 4.7 wt% RCVD-TZP, respectively, much higher than the ZTA composites directly mixed with TZP commercial powder. |
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| Keywords: | Rotary chemical vapor deposition (RCVD) TZP nanoparticles ZTA nanocomposites Spark plasma sintering (SPS) |
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