MATERIALS AND SUSTAINABLE DEVELOPMENT: MATERIALS REMANUFACTURING AND WASTE RECYCLING |
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Research Status and Trend of YSZ Thermal Barrier Coatings Doped with Rare Earth Oxides |
WANG Pengcheng1,2, ZHAO Yuncai1,*, LIU Ming2,*, WANG Huipeng1, MA Guozheng2, WANG Haidou2
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1 College of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China 2 National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China |
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Abstract With the progress and development of science and technology, in the face of increasingly complex working environments, traditional yttria partially stabilized zirconia thermal barrier coating materials are prone to appear when they are used in an environment higher than 1 200 ℃. Problems such as phase transition and severe sintering shrinkage reduce the thermal insulation performance of the coating, and at the same time accelerate the peeling of the coating with a certain volume change. It is necessary to develop a better thermal barrier coating to adapt to the future working environment. The new generation of thermal barrier coatings are divided into the following categories: (i) doped rare earth oxide modified YSZ thermal barrier coatings; (ii) fluorite or pyrochlore structure thermal barrier coatings; (iii) yttrium aluminum garnet or magnetite heat Barrier coating; (iv) thermal barrier coating of perovskite structure. Among them, the thermal barrier coating modified by YSZ with rare earth oxide doping can effectively reduce the thermal conductivity of the thermal barrier coating, improve its high temperature phase stability, high temperature oxidation resistance, high temperature corrosion resistance, etc., which attracted the attention of scholars at home and abroad. This article mainly introduces several kinds of rare-earth oxide doped modified YSZ thermal barrier coatings that are currently expected to replace traditional YSZ coatings. Among them, rare-earth oxides include CeO2, Sc2O3, Gd2O3, La2O3, the physical and chemical properties, research status and existing problems of different rare earth oxide doped YSZ thermal barrier coating materials are reviewed. CeO2 doping can reduce the thermal conductivity of the coating, enhance its corrosion resistance to Na2SO4, and improve its thermal stability; Sc2O3doping can not only reduce the thermal conductivity of the coating, but also greatly improve its phase stability, making the coating at 1 500 ℃. The results show that the single t′ phase remains after long time heat treatment at high temperature; doping Gd2O3 can effectively improve the heat and corrosion resistance, but excessive doping will reduce the mechanical properties; doping La2O3 can enhance the sintering resistance of the coating, and effectively reduce its thermal conductivity. This paper also briefly introduces the research status of other factors (such aspulverizing method, spraying process, etc.) affecting the performance of rare earth oxide doped YSZ thermal barrier coating, summarizes the development trend and research ideas of thermal barrier coating system in the future, and provides a reference for the development of new thermal barrier coating.
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Published: 31 May 2021
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Fund:NSFC (51675531, 51535011, 51965023),Beijing Natural Science Foundation (3172038), Pre-Research Program in National 13th Five-Year Plan (41423060315) and Joint Fund of Ministry of Education for Pre-research of Equipment (6141A02033120). |
About author:: Pengcheng Wang, master in Jiangxi University of Science and Technology,his research direction is thermal barrier coatings. Yuncai Zhao, doctor, professor, master's supervisor, leader of young and middle-aged subjects in Jiangxi Province, preparation of wear-resistant coatings for plasma spray lubrication and wear failure mechanism, deduction of microstructure of metal ceramic coatings by remelting process technical parameters and evolution of tribological properties, ultrasonic surface treatment of surface characteristics, residual changes the stress distribution and tribological properties, the friction characteristics of the polymorphic texture interface and the numerical simulation of lubrication have been systematically studied and explored. Formed some ideas on how to improve the friction and lubrication performance of plasma sprayed wear-resistant coatings, revealed the low friction effect and mechanism of the coating's microstructure and surface texture texture, and solved different groove types some friction and lubricating properties of the texture and various pit-like textures have some depth problems, and a new surface pit-like texture is proposed: rectangular texture. In recent years, he has presided over 2 National Natural Science Foundation Regional Science Fund Projects, 6 Provincial and Ministerial Natural Science Research Projects, and hosted Jiangxi Hengda High-tech Co., Ltd., Jiangxi Naipu New Materials Co., Ltd. and China Aluminum Group 7 Scientific Research Collaboration Projects with large enterprises such as Hangzhou Iron & Steel Co., Ltd. Published more than 60 papers, of which 6 are included in SCI and 20 are included in EI. Published one academic monograph. 3 related utility model patents have been authorized. Independently supervised 21 postgraduates. Ming Liu is an assistant researcher at the national key laboratory for remanufacturing of Armored Force College of the PLA Army. In July 2001, he graduated from Armored Force College of the PLA Army with a bachelor's degree. In December 2018, he received his doctor's degree from department of equipment support and remanufacturing, Armored Force College of the PLA Army. He has been engaged in surface coating and plasma spraying research for a long time. |
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