活性元素改性高温防护涂层的研究现状

发布时间：2018-06-14 19:24

本文选题：高温防护涂层 + 高温氧化　；参考：《表面技术》2017年08期

【摘要】：活性元素(RE)可以显著降低合金的氧化速率和提高氧化膜的抗剥落性能,在高温合金及高温防护涂层上已经得到了大量商业应用,但至今对其微观作用机制尚无统一认识,相关理论体系也不完整。从RE改性高温防护涂层的制备、RE效应及作用模型、过掺杂和共掺杂效应等方面,概述了活性元素在高温防护涂层领域应用的最新进展。重点分析了RE添加对高温过程中氧化膜生长机制、微观结构和氧化膜粘附性能的影响,过量掺杂对抗氧化性能的危害以及多种RE掺杂对合金基体的改善作用。RE改性要在高温防护涂层上体现最佳效果,除需关注RE掺杂对氧化膜生长和氧化膜/涂层基体界面结合状态的影响外,还必须考虑涂层和合金基体的互扩散、涂层中的氧含量、涂层厚度等因素对RE添加种类和添加量的影响。针对目前的研究结果,提出RE改性高温防护涂层在应用上最亟待解决的问题,是确定不同合金体系中RE掺杂的最佳种类和含量。最后,对未来的研究方向进行了展望。
[Abstract]:The active element RE) can significantly reduce the oxidation rate of the alloy and improve the peeling resistance of the oxide film. It has been widely used in commercial applications on superalloys and high temperature protective coatings, but there is no unified understanding of its microcosmic mechanism. The relevant theoretical system is also incomplete. The recent progress in the application of active elements in the field of high temperature protective coatings is summarized from the aspects of RE effect and its action model, overdoping and co-doping effects. The effects of RE addition on the growth mechanism, microstructure and adhesion of oxide film during high temperature were analyzed. The harm of excessive doping on oxidation resistance and the improvement of RE doping on alloy matrix. The best effect of RE modification on high temperature protective coating should be reflected. In addition to the influence of RE doping on the growth of oxide film and the interface bonding between oxide film and coating substrate, the interdiffusion between the coating and the alloy substrate and the oxygen content in the coating must also be considered. The effect of coating thickness on the type and amount of RE addition. According to the current research results, the most urgent problem in the application of RE modified high temperature protective coatings is to determine the optimum type and content of RE doping in different alloy systems. Finally, the future research direction is prospected.
【作者单位】：上海工程技术大学;
【基金】：国家自然科学基金(51501109) 上海高校青年教师培养资助计划(ZZGCD15059) 上海工程技术大学重点科研平台大学生创新训练计划(cz1605014)~~
【分类号】：TG174.4

【相似文献】