刘慧强,崔功军,师睿博,李赛.MoS2/钴基自润滑涂层及高温摩擦学性能[J].稀有金属材料与工程,2020,49(12):4280~4289.[liuhuiqiang,cuigongjun,shiruibo,lisai.MoS2/cobalt based self-lubricating coating and high temperature tribological properties[J].Rare Metal Materials and Engineering,2020,49(12):4280~4289.]
MoS2/钴基自润滑涂层及高温摩擦学性能
投稿时间:2019-12-24  修订日期:2020-05-12
中文关键词:  钴基涂层  高温  摩擦  磨损  MoS2
基金项目:国家自然科学基金(51775365,51405329); 中国博士后科学基金面上资助一等资助项目(2015M570239)
中文摘要:
      采用热压烧结技术在GH4169镍合金表面制备了CoCrNi-(3.0wt%,5.0wt%,7.0wt%) MoS2三种钴基高温自润滑涂层,并优化了MoS2的含量。采用球-盘式高温摩擦试验机,与Si3N4球配副,系统研究了温度、速度与载荷对涂层高温(20~800 ℃)摩擦学性能的影响。采用X射线衍射仪和扫描电镜等分析了涂层的物相成分和微观形貌。通过热冲击实验测试涂层的结合强度。结果表明:MoS2与金属元素反应生成了固体润滑相Mo2S3和CrxSy;涂层与基底具有良好的界面结构;涂层主要由γ(fcc)、ε(hcp)、CrxNiy和固体润滑相(Mo2S3、CrxSy)构成。低温条件下,随着MoS2含量的增加涂层的摩擦系数逐渐降低,高温条件下,由于磨损表面形成了由铬酸盐、氧化物和硫化物组成的固体润滑膜,涂层具有了优异的高温减摩耐磨性能;宽温域内钴基涂层的磨损率保持在5.5×10-5 mm3N-1m-1以下,在20~600 ℃范围内其抗磨损性能比基底高4~17倍,5.0wt%的MoS2对钴基涂层的高温摩擦学性能优化效果最佳。
MoS2/cobalt based self-lubricating coating and high temperature tribological properties
英文关键词:cobalt matrix coating  high temperature  friction  wear  MoS2
英文摘要:
      The high-temperature self-lubricating CoCrNi-(3.0 wt.%, 5.0 wt.%, 7.0 wt.%) MoS2 coatings were prepared on the surface of GH4169 alloy by using a powder metallurgy technology (P/M). The high-temperature tribological properties of coatings sliding against Si3N4 ceramic ball were investigated by using a ball-on-disk high-temperature tribo-meter. The effect of testing temperature, sliding speed and applied load on the tribological properties of coatings was systematically studied from 20 °C to 800 °C. The phase and microstructure of the coatings were analyzed by X-ray diffractometer and scanning electron microscope, and the bonding strength of coating and substracte was tested through the thermal shock test. The results showed that the MoS2 formed Mo2S3 and CrxSy phases with other metal elements. The coatings had a good interface structure with the substrate. The coatings consisted of γ(fcc), ε(hcp), CrxNiy and solid lubricating phases (Mo2S3, CrxSy). At low temperature, the friction coefficient of coatings gradually decreased with the increase of MoS2. At high temperature, the coatings had an excellent high-temperature tribological properties. It was ascribed to the synergistic effect of chromate, oxide and sulfide on the worn surface. The wear rate of the coatings was below 5.5×10-5 mm3N-1m-1 over a wide temperature range, and the wear resistance of the coatings was 4~17 times higher than that of the substrate from 20 °C to 600 °C. The CoCrNi matrix coating with 5.0 wt.% MoS2 showed the best high-temperature tribological properties.
作者单位E-mail
刘慧强 太原理工大学机械与运载工程学院 1529307261@qq.com 
崔功军 太原理工大学机械与运载工程学院  
师睿博 太原理工大学机械与运载工程学院  
李赛 太原理工大学机械与运载工程学院  
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