航空航天用金属表面热防护涂层的研究进展

高温合金材料凭借其优异的综合性能而广泛应用于航空航天领域热端部件.近年来,随着航空航天技术的不断发展,飞行器的热端部件正逐渐面临着更为严峻和复杂的服役环境,因此对高温合金的耐高温、抗氧化等使用性能提出了更高的要求.表面涂层技术由于具有约束条件少、可设计性强、技术类型和材料的选择空间大、经济环保等优点,成为目前最常用的热防护技术手段之一,具有广阔的应用前景和良好的发展潜力.综述了热障涂层、抗氧化涂层材料的研究进展,主要包括YSZ、稀土锆酸盐、稀土六铝酸盐、氧化物、金属间化合物等,并在此基础上探讨了多种热防护涂层的制备方法、工作原理、适用范围.

Advances in the Research of Thermal Protective Coatings on Aerospace Metal Surface

Currently, superalloys are classic materials widely used in hot-end components in aerospace field due to their excellent comprehensive properties. In recent years, with the continuous development of aerospace technology, the hot-end components of air vehicles are gradually facing a more severe service environment. Therefore, better high temperature resistance and oxidation resistance of superalloys are required. Surface coating technology has become one of the most commonly used thermal protection technology methods because of its few constraints, strong designability, large selection of technology types and materials, and economy and environmental protection. So it has broad application prospects and good development potential. The research progress of thermal barrier coating materials and anti-oxidation coating materials are summarized. The main and common materials are YSZ, rare earth zirconate, rare earth hexaaluminate, oxide, intermetallic compounds, etc. The preparation methods of the thermal protective coatings and their working principle, and scope of application are described comprehensively. The future development direction of superalloy surface thermal protective coatings for aerospace is pointed out, that is, continue to optimize the composition design of the coating materials, improve the interface combination between the coating and the substrate, integrate a variety of thermal protection mechanisms and then select appropriate technical methods to prepare multi-layer multi-functional coupling thermal protection coatings to make them better suitable for thermal protection for aerospace metals.