摘要
利用X射线衍射仪、光学显微镜、扫描电镜、能谱分析仪、显微硬度计和摩擦磨损试验机等研究了CeO2掺杂对CoCrCuFeMn高熵合金物相结构、显微组织和耐磨性能的影响。结果表明:CoCrCuFeMn合金掺杂CeO2前后的物相结构均是由枝晶FCC1相和晶间FCC2相构成的典型树枝晶结构,Cu和Ce元素在晶间区域富集;掺杂1 mass%Ce O2后合金的FCC1相衍射峰强度和面积显著增加,FCC2相衍射峰的强度和面积有所减少,掺杂Ce O2合金的显微硬度由219.6 HV0.5增加到235.5 HV0.5,摩擦因数和质量损失率分别由0.57、4.14%降低到0.49、0.96%,这主要是由于Ce元素引起的细晶强化和固溶强化所致。
The effects of CeO2 doping on phase structure,microstructure and friction and wear resistance of CoCrCuFeMn high-entropy alloy were investigated by means of X-ray diffractometer(XRD),optical microscope(OM),scanning electron microscopy( SEM),energy dispersive spectrometer( EDS) analysis,microhardness tester and friction-wear tester.The results show that the phase structure of the CoCrCuFeMn alloy before and after the CeO2 doping is a typical dendritic structure composed of the dendritic FCC1 phase and the interdendrite FCC2 phase,and the Cu and Ce elements are enriched in the interdendrite region;the intensity and the area of the FCC1 phase diffraction peak of the alloy after the doping of 1 mass% CeO2 increase obviously,and the strength and the area of the FCC2 phase diffraction peak decrease,the microhardness of the doped CeO2 alloy increases from 219.6 HV0.5 to 235.5 HV0.5,the average friction coefficient and the mass loss rate decrease from 0.57,4.14% to 0.49,0.96%,respectively,which is mainly due to the fine-grain strengthening and solution strengthening caused by the Ce element.
作者
马明星
王志新
卢金斌
周家臣
梁存
朱达川
张德良
MA Ming-xing;WANG Zhi-xin;LU Jin-bin;ZHOU Jia-chen;LIANG Cun;ZHU Da-chuan;ZHANG De-liang(School of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China;College of Materials Science and Engineering, Sichuan University, Chengdu 610065, China;School of Mechanical Engineering, Suzhou University of Science and Technology, Suzhou 215009, China;School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2019年第9期50-56,共7页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(51271115)
新西兰科技部资助项目(Uo WX0802)
河南省重点科技攻关项目(142102210084)
郑州市中小企业创新基金资助项目(122PCXJJ806)
