摘要
采用粉末冶金+热挤压成形+T4热处理工艺制备包覆氧化镁碳纳米管(MgO coated CNTs, MgO@CNTs)增强的AZ91镁合金复合材料(AZ91-MgO@CNTs),研究干滑动摩擦条件下MgO@CNTs含量、不同载荷对AZ91-MgO@CNTs磨损面形貌、磨屑形貌和耐磨性能的影响。结果表明:MgO@CNTs能显著提高AZ91-MgO@CNTs的摩擦磨损性能,且随着MgO@CNTs含量的增加,对复合材料耐磨性能的增强效果呈现先增大后下降的趋势;与纯CNTs增强的镁合金复合材料(AZ91-CNTs)相比,AZ91-MgO@CNTs具有更小的摩擦因数和更低的磨损量,表明MgO@CNTs在改善镁合金耐磨性能方面更有优势;载荷较低时(10 N),AZ91-MgO@CNTs的磨损机制主要为磨粒磨损;当载荷为50 N时,AZ91-MgO@CNTs出现磨粒磨损、氧化磨损和黏着磨损三种磨损机制。
AZ91 alloy reinforced by carbon nanotubes coated with MgO(AZ91-MgO@CNTs)was prepared by powder metallurgy,hot extrusion and T4 treatment.The influences of MgO@CNTs content and load on the friction and wear property,surface wear morphology and debris topography of AZ91-MgO@CNTs composites were investigated under the dry sliding friction.The results show that MgO@CNTs can improve the wear properties of AZ91-MgO@CNTs.With increasing the content of MgO@CNTs,the strengthening effect of the wear properties of the composite increases and then decreases.Compared with AZ91-CNTs,AZ91-MgO@CNTs has smaller friction coefficient and lower abrasion loss,indicating that the MgO@CNTs is better than CNTs to improve the wear properties of AZ91 alloy.The main wear mechanism of AZ91-MgO@CNTs is abrasive wear under the load of 10 N.When the load is 50 N,there are three wear mechanisms appeared:abrasive wear,oxidation wear and adhesive wear.
作者
袁秋红
周国华
廖琳
王槟
张磊
肖汕
YUAN Qiuhong;ZHOU Guohua;LIAO Lin;WANG Bin;ZHANG Lei;XIAO Shan(Physical Science and Technology College,Yichun University,Yichun 336000,Jiangxi,China)
出处
《航空材料学报》
CAS
CSCD
北大核心
2023年第5期29-38,共10页
Journal of Aeronautical Materials
基金
国家自然科学基金(52061039,52361027)
江西省自然科学基金重点项目(20232ACB204006)
江西省高层次高技能领军人才培养工程项目(3350222001)。
