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对δ相二元钚合金的δ→α相变进行了热力学分析,推导出可以表征δ→α高压相变特性的相平衡压力-成分方程。理论方程的计算值与文献报道的实验值的趋向一致,它可以恰当地解释:(1)δ→α相变压力随合金元素含量呈直线增加的关系;(2)相变压力-成分直线的斜率与常压下稳定δ相至室温所需的最小溶质含量成反比的关系;(3)各种δ-Pu合金的相变压力-成分关系线在溶质含量为零时交于压力轴上同一点的实验结果。此外,利用修正的理论方程,对某些δ-Pu合金的δ→α相变压力作了预测。
The thermodynamic analysis of δ → α transformation of δ-phase binary plutonium alloy was carried out, and the phase equilibrium pressure-component equation that can characterize the δ → α phase transition was deduced. The calculated value of the theoretical equation is consistent with the experimental values reported in the literature, which can be properly explained: (1) the relationship between the δ → α phase transformation pressure and the alloy element content increases linearly; (2) the phase transition pressure-component linear The slope is inversely proportional to the minimum solute content required to stabilize the δ phase to room temperature at atmospheric pressure; (3) the phase-transition pressure-component relationship lines for the various δ-Pu alloys are handed over to the pressure axis when the solute content is zero A little experimental result. In addition, the δ → α transformation pressure of some δ-Pu alloys was predicted by the modified theoretical equation.