490N远地点发动机抗氧化涂层厚度对性能的影响  

Effect of Thickness on Oxidation Resistance of Coatings on 490 N Apogee Engine

作　　者：周红玲[1,2] 徐方涛[3] 张绪虎[3] 贾中华[3] 

机构地区：[1]国防科技大学航天与材料工程学院,长沙410073 [2]上海空间推进研究所,上海200233 [3]航天材料及工艺研究所,北京100076

出　　处：《宇航材料工艺》2011年第5期66-68,73,共4页Aerospace Materials & Technology

摘　　要：针对用于二代490 N远地点发动机推力室的改性硅化物高温抗氧化涂层,重点研究涂层厚度对性能的影响,对不同厚度涂层进行了1 700℃静态氧化试验。结果表明:涂层厚度在100～200μm内,涂层寿命随厚度变化呈现抛物线规律,低于150μm时,厚度较高的涂层能够生产更多的SiO2有利于性能提高;高于150μm后,涂层缺陷过多,导致涂层性能下降。综合考虑,涂层最优厚度为140～160μm。Modified silicide was used as high temperature oxidation resistant coatings on 2nd 490 N apogee engine thruster chamber,and its thickness affected the performance of coatings obviously.The life experiment of samples with different thickness was taken at 1 700℃,and it was found that the best range of thickness was 140 to 160 μm.Available of lower thickness of SiO2 or to much of the amount of micro cracks and holes would shorten the lifetime.

关 键 词：远地点发动机 高温抗氧化 涂层 硅化物 

分 类 号：V439.8[航空宇航科学与技术—航空宇航推进理论与工程]