Effect of Adding Phase on the Properties of ZrB₂ Based Ultra-High-Temperature Ceramics

Abstract:

ZrB2 belongs to a class of ceramics defined ultra-high-temperature ceramics with extremely high melting temperatures, but ZrB2 ceramics is difficultly sintered and easily oxidized. To make ZrB2 ceramics possess the high relative density and the better oxidation resistance. The effects of adding phase on the sintering and oxidation resistance mechanism of ZrB2 based high-temperature multi-phase ceramics were investigated. YAG and Al2O3 help for the densification of ZrB2 based ceramics. The oxidation layer thickness of sintered ceramics adding YAG or YAG-Al2O3 phase is thinner than that of sintered pure ZrB2 ceramics under the same oxidation condition, the oxidation layer thickness of sintered ceramics adding YAG-Al2O3 phase is thinner than that of sintered ceramics adding YAG phase, the oxidation layer thickness of sintered ceramics is decreased with an increased Al2O3 content.

• Periodical: Key Engineering Materials (Volumes 512-515)
• Pages: 735-738
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.512-515.735
• Online since: June 2012
• Authors: Jie Guang Song, Fang Wang, Min Han Xu, Shi Bin Li, Gang Chang Ji
• Keywords: Densification, Oxidation Resistance, Ultra-High-Temperature Ceramics, ZrB₂

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