Tribological behaviors of B₄C-hBN ceramic composites used as pins or discs coupled with B₄C ceramic under dry sliding condition

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• 作者：Xiuqing Li^a ; ^{li_xq@sina.cn" class="auth_mail" title="E-mail the corresponding author} ; Yimin Gao^b ; Shizhong Wei^a ; Qingxia Yang^c
• 关键词：A. Hot pressing ; B. Composites ; C. Friction ; D. Borides
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：1578-1583
• 全文大小：2702 K

文摘

Used as pin or disc specimens, the tribological behaviors of hot-pressed B₄C-hBN ceramic composites containing different contents of hBN (0, 5, 10, 20 and 30 wt%) coupled with B₄C ceramic under dry sliding condition have been investigated using a pin-disc tribometer. Experimental results show that, the dry sliding tribological behaviors of B₄C-hBN ceramic composites against B₄C are obviously different when B₄C-hBN ceramic composites are used as pin or disc specimens, respectively. When B₄C-hBN ceramic composites are used as pin specimens, with hBN content increasing, the friction coefficients of B₄C-hBN/B₄C pairs gradually increase; however, when B₄C-hBN ceramic composites are used as disc specimens, with hBN content increasing, the friction coefficients of B₄C/B₄C-hBN pairs gradually decrease. The reasons that cause the discrepancy are discussed.