摘要
通过测试Cu-Cr-Zr合金在等温加热过程中电阻率的变化,提出了一种计算相对电阻率减小值Δγ的方法,并以Δγ作为描述时效过程的参数,对该合金等温加热时效动力学进行了研究。结果表明,Cu-Cr-Zr合金在等温时效开始阶段,相对电阻率的变化量Δγ急速增加,随着时效时间的增加,Δγ上升幅度逐渐变小,时效结束时Δγ趋于稳定,且相对电阻率的变化量Δγ的增加速率随等温时效温度升高呈现增加趋势;随等温时效温度升高,孕育时间呈现缩短趋势。在此基础上,建立了等温加热时效动力学图,其形状并未呈现常见的"C"形。
According to the linearity relationship of relatively resistivity vs.temperature,a decreased relatively resistivity（namely Δγ） calculating method was proposed based on experiment of testing the change of resistivity of the Cu-CrZr alloy in the isothermal-heating aging process.Using the calculated Δγ as the parameter to describe the isothermal aging process,the isothermal-heating aging kinetics of the tested alloy was established.The results show that the Δγ value of the tested Cu-Cr-Zr alloy increased remarkably at the beginning of the isothermal aging process,then the change of Δγ decreased with increasing aging time,and the Δγ value became constant at the end of the aging process.The increasing rate of the Δγ value increased and the incubation time decreased with increasing isothermal aging temperature.Moreover,the non-＂C＂ shape isothermal-heating aging kinetics curves of the tested alloy are observed.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2008年第2期43-46,共4页
Transactions of Materials and Heat Treatment
基金
河南省教育厅自然科学基金项目(2006430004)
河南科技大学科研基金资助项目(2006ZY046)
关键词
等温加热
时效
动力学
相对电阻率
isothermal-heating
aging
kinetics
relative resistance ratio
