Abstract B4C ceramics were fabricated by pressureless sintering, and the tribological behaviors of B4C ceramics without and with a postannealing treatment at different temperatures were investigated. It was found that the pores of B4C ceramics prepared by pressureless sintering might cause large fluctuations in the coefficient of friction but did not increase the coefficient of friction. A B2O3 layer was not formed on the B4C ceramics after annealing at 700 °C, whereas an H3BO3 layer was formed on the B4C ceramics after annealing at 1000 and 1200 °C, respectively. B4C ceramics obtained a favorable self-lubricating property after annealing at 1000 or 1200 °C because of the formation of an H3BO3 layer during the annealing treatment. B4C ceramics annealed at 1200 °C exhibited the best self-lubricating properties, with the lowest coefficient of friction of approximately 0.08. The friction and wear mechanisms of B4C ceramics without and with a postannealing treatment are discussed in detail.

中文翻译：

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无压烧结不同温度退火制备的B4C陶瓷的摩擦学性能

摘要 采用常压烧结法制备B4C陶瓷，研究了B4C陶瓷在不同温度下经过和未经过后退火处理的摩擦学行为。结果表明，无压烧结制备的B4C陶瓷的孔隙可能会引起摩擦系数的较大波动，但不会增加摩擦系数。B4C陶瓷在700℃退火后没有形成B2O3层，而分别在1000℃和1200℃退火后在B4C陶瓷上形成H3BO3层。B4C 陶瓷在 1000 或 1200°C 退火后获得了良好的自润滑性能，这是因为在退火处理过程中形成了 H3BO3 层。1200℃退火的B4C陶瓷表现出最好的自润滑性能，摩擦系数最低，约为 0.08。详细讨论了没有和有后退火处理的 B4C 陶瓷的摩擦和磨损机制。