廖海洪,张济祥,梁敏洁,白培康

• 1:中北大学材料科学与工程学院
• 2:昆明贵金属研究所

摘要(Abstract)：

基于三元微观相场动力学模型,结合原子图像、序参数和体积分数等手段,模拟了Ni_(75)Al_(12)Cr_(13)合金在900 K下的沉淀行为。结果表明:合金沉淀过程中析出L_(12)和DO_(22)两种有序相;L_(12)相的早期沉淀机制为失稳分解,DO22相的早期沉淀机制为非经典形核和失稳分解的混合机制;L_(12)相首先从无序固溶体中析出,随后DO_(22)相在L_(12)相的畴界处析出;平衡时,获得的L_(12)相的体积分数大于DO_(22)相体积分数。

关键词(KeyWords)： Ni-Al-Cr合金;沉淀;序参数;微观相场

Abstract:

Keywords:

基金项目(Foundation): 山西省自然科学基金(2013011014-1);; 山西省青年科技研究基金(2009021028)

作者(Author): 廖海洪,张济祥,梁敏洁,白培康

DOI: 10.13289/j.issn.1009-6264.2016.05.039

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