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运用测量剩余电阻的方法,研究了4.2K温度时不同纯度的铍中剩余相的分解与其溶解动力学。结果表明:时效有效温度取决于金属中含有杂质的数量,随杂质数量的增加而提高;高纯度铍(～99.94%)如微合金一样也具有时效倾向;应用剩余电阻概念研究纯铍内部结构转变是非常有效的方法,它可记录时效过程初始阶段的变化(如400℃铍中扩散分解),这些变化用微观观察或X射线衍射分析很难得到。
The method of measuring the residual resistance was used to study the decomposition and dissolution kinetics of the remaining phases in beryllium with different purity at the temperature of 4.2K. The results show that the aging effective temperature depends on the amount of impurities contained in the metal and increases with the increase of the amount of impurities. High purity beryllium (~ 99.94%) also has the aging tendency like microalloying. The internal resistance of pure beryllium Is a very effective method that can record the change of the initial stage of aging process (such as diffusion decomposition in beryllium at 400 ° C). These changes are difficult to obtain by microscopic observation or X-ray diffraction analysis.