郝世明,刘鹏茹,刘欣欣,谢敬佩

• 1:河南科技大学物理工程学院
• 2:有色金属新材料与先进加工技术省部共建协同创新中心
• 3:河南科技大学材料科学与工程学院

摘要(Abstract)：

采用真空热压烧结法制备30%SiCp/2024Al复合材料以改善2024铝合金的阻尼性能，通过扫描电镜(SEM)、X射线衍射(XRD)、能谱仪(EDS)、高分辨透射电镜(HRTEM)等对复合材料热处理前后的微观组织进行了表征。采用动态热机械分析仪(DMA)研究其热处理前后的阻尼特性。结果表明：热压烧结制备的复合材料界面结合良好，无界面反应，存在许多粗大析出相颗粒，经热处理之后，纳米析出相弥散分布在基体中，可提高复合材料的阻尼性能。30%SiCp/Al复合材料的阻尼性能随温度和应变量的升高而增大，储能模量随温度和应变量的升高而降低。热处理态复合材料中大量弥散的纳米析出相颗粒增加了界面的数量，使界面阻尼增加。复合材料的阻尼机制为位错阻尼、晶界阻尼和界面阻尼。晶界阻尼对温度敏感，大量的界面、晶界可以明显改善复合材料的高温(大于250℃)储能模量，从而改善30%SiCp/Al复合材料的阻尼性能。

关键词(KeyWords)： 铝基复合材料;阻尼性能;SiC;微观结构;界面

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上项目(52171138);; 河南省科技攻关项目(222102230088)

作者(Author): 郝世明,刘鹏茹,刘欣欣,谢敬佩

DOI: 10.13289/j.issn.1009-6264.2022-0499

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