【摘要】 采用粉末冶金法制备了短碳纤维增强镍基复合材料和N i80Cr20合金,并根据Larson-M iller参数方程对两种材料的高温力学性能进行了模拟对比研究。高温模拟试验结果表明,试验材料的维氏硬度值和热处理参数P基本上是线性关系,说明Larson-M iller参数方程对镍基复合材料的寿命设计具有一定的适用性。高温模拟研究还表明,碳纤维含量(体积分数)为5%的镍基复合材料的高温力学性能优于N i80Cr20合金的。更多还原

【Abstract】 The short carbon fiber reinforced nickel based composite and Ni80Cr20 alloy were prepared by the powder metallurgy method for comparison studies.High temperature simulation for mechanical properties was carried out based on the Larson-Miller function.The simulation results show that the Vicker′s hardness of the tested materials is approximately proportional to the heat treatment parameter P,which indicates that the Larson-Miller function is applicable for the life-span design of C_f/Ni composite.The experiment results also indicate that the C_f/Ni composite containing 5% volume fraction of carbon fiber is superior to Ni80Cr20 alloy in high temperature mechanical performance.更多还原