韩玉君,叶福兴,李晓泉

• 1:南京工程学院材料工程学院
• 2:江苏省先进结构材料与应用技术重点实验室
• 3:天津大学材料科学与工程学院天津市现代连接技术重点实验室

摘要(Abstract)：

分别用超音速氧燃料工艺和大气等离子工艺在球墨铸铁QT-500上制备热障涂层的粘结层与陶瓷层。通过X射线衍射仪、扫描电子显微镜和Cr3+荧光光谱表征热障涂层随着高温氧化服役进行界面化合物演变规律。研究表明,热障涂层的粘结层/陶瓷层界面上层(CS层)由(Co,Ni)(Co,Al)2O4和Co3O4组成,其下层为Al2O3;用面积法分析了CS层和Al2O3层厚度的变化规律;粘结层/基底合金界面的热生长氧化物为层状和块状交替分布的形貌,其成分主要为Al2O3。1050℃+15 h高温氧化后,粘结层/陶瓷层界面残余压应力随θ-Al2O3→α-Al2O3相转变完全达最低值,然后其残余压应力略有升高,这与大量生长的Co3O4和尖晶石类氧化物有关。

关键词(KeyWords)： 超音速氧燃料工艺;热障涂层;Cr3+荧光光谱;CS层;高温氧化

Abstract:

Keywords:

基金项目(Foundation): 南京工程学院校级科研基金(YKJ201308,QKJB201401);; 天津大学内燃机燃烧学国家重点实验室自由课题(低散热内燃机的热喷涂隔热涂层的性能及其热力学仿真优化)

作者(Author): 韩玉君,叶福兴,李晓泉

DOI: 10.13289/j.issn.1009-6264.2015.10.029

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