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对快速凝固Ｔｉ－５Ａｌ－４Ｓｎ－２Ｚｒ－１Ｍｏ－０．２５Ｓｉ－１Ｎｄ（Ｔｉ－５５）高温钛合金９８０℃，５ｈ处理样品的透射电镜分析表明，稀土第二相在合金中以双模型分布，较小颗粒尺寸为２０－８０ｎｍ，较大颗粒尺寸为２００－３００ｎｍ．在扩散控制第二相粒子长大动力学方程的基础上，运用扰动理论，分析了第二相颗粒尺寸的定态解的稳定性，并验证了双模型分布．
Transmission electron microscopy analysis of the rapidly solidified Ti-5Al-4Sn-2Zr-1Mo-0.25Si-1Nd (Ti-55) high temperature titanium alloy at 980 ℃ for 5h shows that the second phase of rare earth is distributed in the dual model in the alloy, The smaller particle size is 20-80 nm and the larger particle size is 200-300 nm. On the basis of diffusion-controlled kinetic equation for the growth of second-phase particles, the stability of the stationary solution of the second-phase particle size is analyzed by using perturbation theory, and the dual-model distribution is verified.