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Enhancement of thermal stability and high-temperature oxidation resistance of chromium oxide-based films by addition of rare earth element Y

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材料科学技术（英文版） 2024年第21期188卷 105-115页

作者： Bingsen Jia Wenju Xu Jingfeng Li Xiaohong Liu Li Ji Chufeng Sun Jia Li Hongxuan Li State Key Laboratory of Solid lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China School of Chemical Engineering Northwest Minzu UniversityLanzhou 730030China State Key Laboratory of Solid lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China State Key Laboratory of Solid lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Chemical Engineering Northwest Minzu UniversityLanzhou 730030China

Chromium oxide ceramic materials are widely used in high-temperature applications requiring high wear resistance and *** further improve the friction and wear performance and high-temperature sta-bility of chromium oxide thin films,this study attempted to dope rare earth(RE)element Y(yttrium)and deposited CrYO high-temperature self-lubricating ceramic thin films with different doping levels on the surface of IN718 alloys by using multi-arc ion plating *** deposited films were annealed at 1000 ℃ for 2 h under atmospheric conditions to analyze the changes in phase composition and thick-ness,and the friction and wear characteristics of the CrYO films were tested using a high-temperature friction and wear tester in the temperature range of 25-600 ℃.The results show that the CrYO-2 film has a dense multilayer structure,and the multilayer oxide film produces interlayer sliding under fric-tional shear,thus providing *** particular,the friction coefficients are as low as about 0.25 in the middle and high-temperature sections(400,600 ℃),which provides good high-temperature tribolog-ical *** addition,the doping of Y elements dramatically affects the formation of the oxide layer and the distribution of voids in the film,changing the diffusion process of the elements of the base ma-terial inside the film and at the film-air interface at high *** two annealing treatments,the film thickness increased from 1.81 to 2.25 μm,and the volume expansion of the films was effectively controlled compared with that of the Cr2O3 films.

关键词： CrYO film Multilayer structure high-temperature lubrication Thermal stability

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