Al2O3-TiC p材料通过在高温下发生氧化反应, 生成物对裂纹处的填充迁移, 使裂纹产生愈合现象. 加热温度、保温时间、压痕载荷均对愈合效果产生影响. 对Al2O3-TiC p材料裂纹愈合动力学研究表明: 含裂纹材料强度的恢复符合公式:σf/σf0=[1-2Δ(P·k1/2)/B0·t1/2]-1/4, 愈合速度为-
Oxidation reaction happened when Al2O3-TiC p composite heated at high temperature. The reaction producer moved to the crack area which induced crack healing. The heating temperature, time, and indentation affected the crack healing greatly. The kinetic analysis of crack healing of Al2O3-TiC p composite shows that: the strength recovery can be expressed by the following formula:σf/σf0=[1-2Δ(P·k1/2)/B0·t1/2]-1/4, and the velocity
of crack healing can be showed as: -
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