Cu层包覆CNTs与原位自生纳米相协同增强铝基复合材料的微观结构及力学性能  

Microstructure and mechanical properties of Al matrix composites synergistically reinforced by Cu layer-coated CNTs and in situ nano reinforcement

作　　者：余炜琳 孙天宇 喻惠望 郭柏松 YU Weilin;SUN Tianyu;YU Huiwang;GUO Baisong(Institute of Advanced Wear and Functional Materials,Jinan University,Guangzhou 510632,China)

机构地区：[1]暨南大学先进耐磨蚀及功能材料研究院,广东广州510632

出　　处：《中南大学学报（自然科学版）》2024年第8期3083-3092,共10页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(52004101);广东省科技计划项目(2022A0505050043)。

摘　　要：以纯铝粉末、CuO粉末和Cu层包覆CNTs为原料,采用快速热压烧结方法制备Al-CNTs(Cu)-CuO复合材料,研究不同质量分数的CuO对复合材料中原位反应生成相特征及其对材料力学性能和磨损性能的影响。研究结果表明:提高铝基复合材料中CuO含量会显著促进Cu层包覆CNTs增强铝基复合材料中Al_(2)Cu及Al_(2)O_(3)纳米相的原位析出,不仅提高了铝基复合材料的强韧性匹配度,而且降低了磨损率,提高了耐磨性能。Cu层包覆CNTs与原位自生纳米相协同强化作用可以有效地提升铝基复合材料的综合服役性能,其在航空航天、轨道交通等领域具有十分广阔的应用前景。The Al-CNTs(Cu)-CuO composites were prepared by rapid hot-press sintering method using pure aluminum powder,CuO powder and Cu-coated encapsulated CNTs as raw materials,and the effects of different mass fractions of CuO on the characteristics of the in situ precipitates as well as the mechanical and wear properties of the reinforced aluminum matrix composites were investigated.The results show that with the increase of CuO content in the aluminum matrix composites,the in situ precipitation of Al_(2)Cu and Al_(2)O_(3)in the Cu coated CNTs reinforced aluminum matrix composites is significantly promoted,which not only makes the aluminum matrix composites have higher strength-toughness match,but also reduces the wear rate and improves the wear-resistant properties of the composites.The synergistic reinforcement of Cu coated CNTs and in situ formed nano reinforcements can effectively improve the service performance of aluminum matrix composites,which makes them have a broad application prospect in the fields of aerospace and rail transportation.

关 键 词：铝基复合材料 碳纳米管 原位固相反应 力学性能 摩擦磨损 

分 类 号：TB333[一般工业技术—材料科学与工程]