ZrO<sub>2</sub>(AlN)/h-BN复合陶瓷性能研究及超重力凝固坩埚研制

doi:10.11896/cldb.23080202

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Abstract Solidification is one of the most basic forming technologies for preparingfor materials. However, during the hypergravity solidification, the centrifugal force during the high-speed rotation can be capable to overcome the surface tension generated by the alloy melt exiting the pores of the crucible, which will easily cause the melt to leak out of the crucible, finally leading to the failure of the experiment. In this study, ZrO₂/h-BN and AlN/h-BN multiphase ceramics were prepared by hot-pressing sintering process and their physical and mechanical properties were tested. The results show that the thermal conductivity of AlN/h-BN are better than that of ZrO₂/h-BN, and the high temperature compressive strength of AlN/h-BN is also significantly higher than that of ZrO₂/h-BN. Based on the mechanical analysis of the damage of the crucible during the hypergravity solidification, AlN/h-BN with low density, high thermal conductivity and high compressive strength was selected to prepare for the crucible. The performance of the crucible was verified through 50 furnace experiments, confirming its suitability for hypergravity solidification.

Key words： ZrO₂/h-BN multiphase ceramics AlN/h-BN multiphase ceramics physical property compressive strength crucible preparation

Published: 10 November 2024 Online: 2024-11-11

CLC number:

TQ174

Fund:National Natural Science Foundation of China (51988101).

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	ZHAO Jianjiang
	CHEN Yunmin
	WEI Hua

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ZHAO Jianjiang,CHEN Yunmin,WEI Hua. Properties of ZrO₂ (AlN)/h-BN Multiphase Ceramics and Crucible Preparation for Hypergravity Solidification[J]. Materials Reports, 2024, 38(21): 23080202-6.

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http://www.mater-rep.com/EN/10.11896/cldb.23080202 OR http://www.mater-rep.com/EN/Y2024/V38/I21/23080202

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