摘要
通过真空热压烧结制备了GNPs-Al中间预制块,采用熔铸法将中间预制块加入到A380熔体中制备了GNPs/A380铝基复合材料。研究了石墨烯纳米片(GNPs)的含量对A380铝合金微观结构和摩擦磨损性能的影响。结果表明:质量分数为1.0%的GNPs/A380复合材料具有最佳的显微组织,适量的GNPs可以显著细化α-Al、Si相和Al5FeSi相,从而提高A380铝合金的维氏硬度。随GNPs的含量增加,GNPs/A380复合材料的磨损率和摩擦系数均先减小而后增大。1.0%GNPs/A380复合材料的磨损率和平均摩擦系数相比于基体分别降低了37%和15.5%。其中,A380基体合金的主要磨损机制为剥层磨损,而1.0%GNPs/A380复合材料是以磨粒磨损为主要磨损机制。
The GNPs-Al intermediate prefabricated blocks were prepared by vacuum hot-press sintering,and the effects of the content of graphene nanosheets(GNPs)on the microstructure and frictional wear properties of A380 aluminum alloy were investigated.The results show that GNPs/A380 composites with a mass fraction of 1.0%have the best microstructure,and the appropriate amount of GNPs can significantly refine theα-Al,Si phase and Al5FeSi phase,thus improve the Vickers hardness of A380 aluminum alloy.The wear rate and friction coefficient of GNPs/A380 composites decrease first and then increase with the increase of GNPs content.The wear rate and average friction coefficient of the 1.0%GNPs/A380 composites are reduced by 37%and 15.5%,respectively,compared to the matrix.Moreover,the main wear mechanism of the A380 matrix alloy is exfoliation wear,while the 1.0%GNPs/A380 composites are subjected to abrasive wear as the main wear mechanism.
作者
曾凡毅
喻涛
刘智彬
廖齐伟
黄虎
Zeng Fan-yi;Yu Tao;Liu Zhi-bin;Liao Qi-wei;Huang Hu(Jiangxi Senior Technical Instiute of Chemical Industry,Jiangxi Nanchang 330039,China;Jiangxi Vocational and Technical College of Communication,Jiangxi Nanchang 330031,China)
出处
《炭素技术》
CAS
北大核心
2023年第4期49-53,共5页
Carbon Techniques
基金
2020年江西省交通运输厅科技项目(2022H0048)。
