The results have shown that the incubation period of crack nucleation decreases and the propagation rate of crack increases with increasing the cyclic temperature.
试验结果表明，随着循环温度的增高，裂纹形核孕育期缩短， 裂纹扩展速率增大；
The incubation period of crack nucleation decreases and the crack propagation rate increases with the increase of thermal cycling temperature and cooling rate in the cycle.
随循环温度和冷却速率的增加，裂纹形核的孕育期缩短，裂纹扩展速率增加。
The result showed that, along with the prolonged preheating period, lower nucleation amount but larger crystal size of diamond was obtained.
得到了随预热处理时间延长，金刚石产量降低，粒度增粗、成核数量减少的结果。
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