采用微观相场模型, 基于离散格点形式的微观扩散方程和非平衡自由能函数, 编制了三元Ni75AlxV25-x合金的原子层面计算机模拟程序.模拟发现: 低铝含量Ni75AlxV25-x合金的θ相先于γ′相析出, 其沉淀机制为等成分有序化+失稳分解; γ′相在θ相的相界处非经典形核, 二者均先形成非化学计量比有序相, 之后向化学计量比有序相转变.
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