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Al_2O_3–SiC复相陶瓷的摩擦磨损特性

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Abstract:

用真空热压工艺制备了Al2O3-SiC复相陶瓷。对热压烧结的纯Al2O3以及Al2O3-SiC复相陶瓷进行了摩擦磨损实验,研究了SiC添加量对复相陶瓷摩擦磨损性能的影响。结果表明在压力为25MPa,1635℃热压烧结1h,当SiC的质量含量为5%时,Al2O3-SiC复相陶瓷的耐磨性最佳,虽摩擦系数最大(0.61,Al2O3则为0.46),但磨损率(WR)仅为5×10-4mm3/(N·m)。Al2O3-SiC复合材料的磨损机理为脆性断裂引起的磨粒磨损,材料的WR与断裂韧性(KIc)和Vickers硬度(HV)的乘积(KIc1/2HV5/8)成反比。

References

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