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[交流] 【求助】phase stability是什么？相稳定性指的是什么？

看到一篇文章，提到了相稳定性，不知道什么意思，对第一性原理完全不懂，希望达人扫下盲，这个相稳定性计算出来有什么用？？

The method of pseudopotentials within the generalized gradient approximation has been employed to calculate the phase stability, electronic structure and elastic constants of beta, alpha '' and omega metastable phases in the Ti-25 at.% Nb alloy. The bulk, shear and Young's moduli of those metastable phases are estimated from the theoretical elastic constants by the Voigt-Reuss-Hill averaging method. The results show that the phase stability of those different metastable phases follows the order of alpha '' > omega > beta from the viewpoint of energetic and electronic structure. The bulk moduli of beta, alpha '' and omega phases are close, but the shear and Young's moduli increase with beta, alpha '' and omega phase in that order.

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