摘要
分别描述了纳米氧化锆粉体与空心球氧化锆粉体的制备工艺,分析了不同工艺影响氧化锆产物形态、结构、粒度等方面的因素,并将2种粉末制备的涂层分别与传统微结构涂层进行性能对比。在分析由不同氧化锆粉末制备而成的涂层性能时,除了工艺参数外,更多的是考虑初始氧化锆粉末对涂层性能所带来的影响。期待在未来的研究中,能够优化现有或者探索出更优异的制粉工艺,研究出性能更加优良的新型粉末,以期能够提高热障涂层的性能,满足高精尖领域在未来的使用需求。最后,针对不同制粉工艺及不同粉末制备涂层的发展方向进行了展望。
The thermal barrier coating(TBC) system is one of the most complex high temperature protective coatings that act as a physical barrier to high temperature gases and reduce the surface temperature of the substrate,improving the durability and efficiency of advanced gas turbine engine hot section components.It has excellent performance and is widely used.The TBC system consists of two parts:the metal bonding coating and the top ceramic coating.The metal bonding coating can protect the alloy substrate from high temperature oxidation and corrosion,and enhance the bonding force between the substrate and the ceramic coating.The ceramic coating is the most important TBC.It plays an important role in high temperature protection.The role of the ceramic coating is mainly reflected in the two aspects:blocking the damage to the substrate caused by high temperature and improving the service life of the substrate material.To a certain extent,it is even directly related to the thrust-weight ratio and thermal efficiency of the engine.Once the ceramic insulating coating is partially or completely peeled off,the base material will be directly exposed to harsh environments,which will damage the base material and reduce its service life.In order to better protect high-temperature components,improve their use efficiency,and prolong their service life,it is very important to explore materials that are more suitable for application in thermal barrier coatings and to prepare coatings with better performance.In decades of research,zirconia material has been found to be one of the most suitable materials for thermal barrier coatings.Zirconia is an oxide ceramic material with a special crystal structure.It has mechanical properties very similar to metals,and has a thermal expansion coefficient that is very similar to nickel-based and cobalt-based.With excellent properties such as thermal stability and corrosion resistance,zirconia-based ceramic materials are widely used in thermal barrier coatings.Studies have shown that the performance of thermal barrier coatings is closely related to the microstructure of the top ceramic layer,which in turn is influenced by its ceramic powder morphology.In this paper,the preparation processes of nano-zirconia powder and hollow spherical zirconia powder were described respectively,and the factors affecting the morphology,structure and particle size of zirconia products by different processes were analyzed.The performance of traditional microstructure coatings was compared.When analyzing the performance of coatings prepared from different zirconia powders,in addition to process parameters,more consideration was given to the effect of initial zirconia powder on coating performance.It is hoped that in future research,the existing pulverizing process can be optimized or a better pulverizing process can be explored,and new powders with better performance can be developed,in order to fundamentally improve the performance of thermal barrier coatings to meet the needs of aviation and meet the future use requirements of high-precision fields such as aerospace and military energy.Finally,this paper put forward its own views on the different existing pulverizing processes to obtain powders with different morphological structures and prospected the future development direction of coatings prepared from different powders.
作者
郭德林
孙华键
孙兆新
樊世冲
侯良朋
李如庆
杨明辉
孙金钊
殷凤仕
GUO De-lin;SUN Hua-jian;SUN Zhao-xin;FAN Shi-chong;HOU Liang-peng;LI Ru-qing;YANG Ming-hui;SUN Jin-zhao;YIN Feng-shi(School of Mechanical Engineering,Shandong University of Technology,Shandong Zibo 255000,China;Zibo City Zichuan Zhaoxin Chemical Co.,Ltd.,Shandong Zibo 255129,China)
出处
《表面技术》
EI
CAS
CSCD
北大核心
2023年第10期75-98,共24页
Surface Technology
基金
山东省自然科学基金(ZR20191112010)。
关键词
制备氧化锆粉末
粉末性能
粉末与涂层
涂层性能
preparation of zirconia powder
powder properties
powders and coatings
coating properties
