Low-temperature sintering behavior and mechanical properties of BN-ZrO₂-SiC composites

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• 作者：Lei Chen ; Yujin Wang ; ^{wangyujin_hit@163.com} ; Jia-Hu Ouyang ; Xiaoming Duan ; Yu Zhou
• 关键词：BN-ZrO2-SiC composites ; Transient viscous sintering ; Densification mechanism ; Mechanical properties
• 刊名：Materials Science and Engineering: A
• 出版年：2017
• 出版时间：10 January 2017
• 年：2017
• 卷：681
• 期：Complete
• 页码：50-55
• 全文大小：889 K
• 卷排序：681

文摘

A novel pressure-assisted transient viscous phase sintering process has been used to fabricate dense BN-ZrO2-SiC composites at relatively low sintering temperatures. The sintering behavior and densification mechanism of BN-ZrO2-SiC composites incorporated with B2O3 as transient viscous phase have been investigated. A rapid densification process occurs at about 1300 °C, which is attributed to the in-situ formation of SiO2 by chemical reactions among ZrO2, SiC and B2O3. BN-ZrO2-SiC composites sintered at 1300 °C under 100 MPa exhibit a relative density of 95.9%, a flexural strength of 242 MPa and a fracture toughness of 4.1 MPa m1/2.