李晗嫣,陈文革,刘洁

• 1:西安理工大学材料科学与工程学院

摘要(Abstract)：

采用固-液复合法制备纯铜-纯铝复合材料。利用光学显微镜、XRD、SEM、EDS、显微硬度计和拉压万能试验机等手段研究结合界面的微观组织、相组成、成分分布、力学性能及断口特征。结果表明,在700℃下,可实现铜铝的固液复合,界面平整,存在一定宽度的过渡层,有元素互扩散现象。在界面生成CuAl_2、CuAl、Cu_9Al_4、CuAl_3、CuAl_4等多种金属间化合物或固溶体。Cu-Al结合界面的宽度随退火温度升高而增加,生成的中间相因相互反应而减少,界面结合强度则逐渐增大。直接复合的结合强度为29.9 MPa,经200℃×2 h和400℃×2 h退火处理后的界面结合强度则分别为59.1 MPa和74.1 MPa。直接复合的断裂方式为偏向韧性的准解理断裂,断口凹凸不平,出现少量撕裂棱,经退火处理后发生典型的脆性断裂,断口出现明显的解理台阶及大量撕裂棱。提出铜/铝复合界面主要包括富铜区,富含金属间化合物的过渡区、富铝凝固区和富铝区4个区域。

关键词(KeyWords)： 铜铝复合材料;退火处理;界面;扩散

Abstract:

Keywords:

基金项目(Foundation): 陕西省重点项目

作者(Author): 李晗嫣,陈文革,刘洁

DOI: 10.13289/j.issn.1009-6264.2016-X237

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