彭银利,李梅,师晟祺,赵柯,董博闻,解芳,雷晓维

• 1:南阳理工学院智能制造学院
• 2:湖北理工学院机电工程学院
• 3:大连理工大学材料科学与工程学院
• 4:西北工业大学物理科学与技术学院

摘要(Abstract)：

利用扫描电镜(SEM)表征了铸态合金Cu-24Pb-2Sn(mass%)的微观组织及Pb元素分布，结合相图计算-相场协同方法探究了合金凝固过程中第二相液滴形核与生长过程。结果表明：与1373 K浇铸试样相比，1473 K浇铸试样中富Pb第二相平均尺寸更大，最大直径超过100μm。由计算分析可知，在合金凝固过程中，Pb元素在Cu基体中的固溶度不断降低，被排出的Pb元素进入第二相液滴，从而形成富Pb第二相，伴随第二相之间碰撞和凝并，共同导致了富Pb相快速长大并粗化。

关键词(KeyWords)： Cu-Pb-Sn合金;第二相;形核生长;相场

Abstract:

Keywords:

基金项目(Foundation): 河南省自然科学基金青年基金项目(212300410213);; 河南省大学生创新创业训练计划项目(202211653009);; 南阳理工学院校级交叉学科研究项目和开放实验室项目资助课题;; 国家自然科学基金(52201038,52201044)

作者(Author): 彭银利,李梅,师晟祺,赵柯,董博闻,解芳,雷晓维

DOI: 10.13289/j.issn.1009-6264.2022-0364

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