论文部分内容阅读
研究了不同时效时间下电流对Cu-0.86Cr合金时效后最大电导率和时效速率的影响,并与传统无电流作用下时效的结果进行了比较。结果表明,直流电流下时效合金的最大电导率由无电流时的47.92MS/m提高到了48.23MS/m;同时直流电流促进了合金的时效速率,其中时效6h时有无电流下时效合金的电导率分别为其最大电导率的98%和94%,其原因一方面是通电条件下合金试样自身电阻产生焦耳热促进时效析出,另一方面电流作用时合金中漂移电子对合金内部空位和位错产生电子风力的作用,促进空位位错的运动,空位对、空位群的形成和大量位错为合金中溶质原子的析出提供形核场所,促进析出。
The effects of different aging time on the maximum conductivity and aging rate of Cu-0.86Cr alloy after aging were studied, and the results were compared with those of aging without current. The results show that the maximum conductivity of the aged alloy increases from 47.92MS / m without current to 48.23MS / m under direct current, and the DC current promotes the aging rate of the alloy. The electrical conductivity Respectively, the maximum conductivity of 98% and 94%, on the one hand because of the power of the alloy sample self-resistance Joule heat aging precipitation, the other hand, the role of current drift electrons in the alloy internal vacancies and dislocations The role of electronic wind force to promote the movement of vacancies, vacancies, the formation of vacancies and a large number of dislocations for the precipitation of solute atoms in the alloy to provide a nucleation site, to promote precipitation.