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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Fundamental Aspects and Modeling Powder Metal Synthesis and Processing
Presentation Title Optimization of Temperature Regime of Spark Plasma Sintering of AlON Powder
Author(s) Yingchun s Shan, Xialu Wei, Xiannian Sun, Geuntak Lee, Jiujun Xu, Eugene A Olevsky
On-Site Speaker (Planned) Xialu Wei
Abstract Scope Using bimodal pure aluminum oxynitride (AlON) powder synthesized by carbothermal reduction and nitridation method, including 0.5% Y2O3 as a sintering additive, AlON ceramics are fabricated by spark plasma sintering (SPS) at different sintering temperatures. Relative density of ≥99.86% is achieved for all the obtained AlON ceramics samples sintered at 1400-1550C after holding for 10min under 40MPa. The observed phase assemblages of sintered samples strongly depend on the sintering temperature due to the phase transformations between AlON, α-Al2O3 and AlN. Single phase AlON ceramics are obtained when sintering temperature is greater than 1500C. The measured maximum infrared transmittance for 1.2mm thick samples is 70.2%, which is similar to the one obtained in samples pressureless sintered for 30min at 1880C . Therefore, the conducted study indicates that sintering temperature and holding time needed to fabricate transparent AlON ceramics by SPS can be lowered by 380C and 20min, respectively.
Proceedings Inclusion? Undecided

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Effect of Additives on the Densification Kinetics and Microstructure of Hot-Pressed Boron Suboxide
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Fabrication of Ti Powder by Combined Techniques of Cold Crucible and Gas Atomization
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Mesoscale Modeling of Single Particle Impact Induced Microstructural Evolution during Cold Spray of Aluminum Powders
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