利用微观相场动力学模型,模拟研究温度对Ni-12at％Cr-14.5at％Al合金沉淀过程中Cr原子的替代规律.在873～1173 K范围内,随着温度的提高,合金沉淀机制由等成分有序化+失稳分解转化为非经典形核机制,沉淀孕育期逐渐延长;Ll2相体积分数增加,而D022相体积分数减少,在1173 K时,D022相消失,最终形成单一的L12相.
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