摘要
利用ＲＦＬ热腐蚀试验装置，在温度为９００℃，盐浓度２０～１００ｐｐｍ，试验时间２００小时的条件下，研究了三种具有不同硅分布形式的Ａｌ－Ｓｉ涂层的抗热腐蚀性能。试验结果表明：涂层的抗热腐蚀性能与涂层中硅的分布形式密切相关。在涂层硅含量相当的情况下，硅呈内高外低的形式分布，可使涂层获得更佳的抗热腐蚀性能。
Hot corrosion behavior of three Al-Si coatings with different forms of silicon distribution was studied by RFL test apparatus at 900℃ in an atmosphere containing 20～100ppm salt.Total time of test was 200 hours.Experimental results showed that the corrosion resistance of these coatings was closely related to the silicon distribution in coatings. When coatings are well-matched in the silicon content,silicon distribu-tion is lower in the external zone and higher in the internal zone,it has the better hot corrosion behavior.
出处
《航空材料学报》
CAS
CSCD
1994年第2期36-40,共5页
Journal of Aeronautical Materials
关键词
硅
涂层
热腐蚀
silicon,coating,hot corrosion
