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利用新型高温梯度（ＧＬ＝２５６～１３００Ｋ／ｃｍ）定向凝固装置，研究了籽晶法制备含细亚结构的镍基高温合金ＤＤ３单晶及二元模型合金Ａｌ０．８５％Ｃｕ晶体生长过程的组织演化与选择特征中的非稳态组织特性，特别是定向胞状振荡性微观结构的组织特征及其与定向凝固工艺条件的关系，并将其与在晶体生长透明有机物模拟装置Ｊａｃｋｓｏｎ温度平台（ＧＬ可达１５０Ｋ／ｃｍ）上原位观察到的ＣＢｒ４定向生长结果相对比，从而分析其形成机制，探索有效控制和利用该现象的工艺途径。
A novel high-temperature gradient (GL = 256 ~ 1300K / cm) directional solidification apparatus was used to study the growth process of seed crystals prepared by the seed crystal method of DD3 single crystal containing Ni-base superalloy and Al0.85% Cu binary alloy The characteristics of unsteady microstructure in tissue evolution and selection, especially the microstructure of directional cell-like oscillatory microstructure and its relationship with the directional solidification process conditions, and with the crystal growth in transparent organic matter simulation device Jackson temperature platform (GL up to 150K / cm) on the CBr4 directional growth observed in situ relative to the relative results, to analyze the formation mechanism to explore effective ways to control and use of the phenomenon of the process.