摘要
采用熔铸法制备等摩尔比的AlCoCrCuFe高熵合金。利用X射线衍射仪、扫描电镜、能谱分析仪、显微硬度计和摩擦磨损试验机分别测试CeO2掺杂前后对其物相结构、显微组织和摩擦磨损性能的影响。结果表明:AlCoCrCuFe由BCC和FCC双相组成,合金中掺杂1%(质量分数)CeO2后引起衍射峰强度的显著提高。两种合金显微组织均为典型树枝晶,Cu与Ce元素在晶间富集,枝晶内为调幅分解组织。CeO2的加入使合金显微硬度从441.5HV增加到475.3HV,摩擦因数与质量损失率分别从0.55,1.44%降低到0.4,1.28%。
AlCoCrCuFe high-entropy alloy was fabricated by melting-casting method.The phase structure,microstructure and friction and wear property for this alloy without and with CeO2 doping were investigated by XRD,SEM,EDS,microhardness tester and friction-wear tester,respectively.The results show that AlCoCrCuFe alloy has BCC+FCC dual phase structure.1%(mass fraction)CeO2 addition improves the diffraction peak of AlCoCrCuFe alloy.The microstructure of two above alloys is typical dendrite structure.The interdendrite region is mainly Cu-rich and Ce-rich area,and the dendrite microstructure is layered grid structure of spinodal decomposition.After CeO2 adding,the microhardness increases from 441.5HV to 475.3HV,and the friction coefficient and the mass loss rate decrease from 0.55 and 1.44% to 0.4 and 1.28%,respectively.
作者
马明星
王志新
梁存
周家臣
张德良
朱达川
MA Ming-xing;WANG Zhi-xin;LIANG Cun;ZHOU Jia-chen;ZHANG De-liang;ZHU Da-chuan(School of Materials and Chemical Engineering,Zhongyuan University of Technology,Zhengzhou 450007,China;School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China;College of Materials Science and Engineering,Sichuan University,Chengdu 610065,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2019年第7期106-111,共6页
Journal of Materials Engineering
基金
国家自然科学基金资助项目(51271115)
河南省重点科技攻关项目(142102210084)
