| 摘要: |
| 热障涂层在高温环境服役过程中，常常由于界面处大量元素的互扩散导致失效。文中选用TiN和TiN?AlN薄膜作为界面处的阻扩散层,与无阻扩散层体系的性能进行对比。采用热震试验研究3种体系粘结层/基体界面的结合性能；为了研究高温环境中界面处元素的扩散情况，将3种体系在1050 ℃下热氧化处理100 h，采用电子探针技术研究各个体系界面处元素的分布。试验结果表明：经过135次热震，TiN阻扩散层体系断裂面出现在粘结层与基体之间；经过240次热震，TiN?AlN阻扩散层体系和无阻扩散层体系断裂面均出现在面层与粘结层之间。微观检测发现无阻扩散层体系的界面处发生了严重的元素扩散；TiN阻扩散层体系界面处几乎不发生元素扩散；而TiN?AlN阻扩散层体系界面处发生少量的元素扩散。 |
| 关键词: TBCs 互扩散 阻扩散层 TiN TiN−AlN |
| DOI： |
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| Influence of Interface Diffusion Barrier Films on Properties of Thermal Barrier Coatings (TBCs) |
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ZHANG Xiao–nan, FU Dong–xing, WANG Li–min, ZHANG Jing–huai, YANG Zhong–yuan
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GRIPM Advanced Materials Co. Ltd, General Research Institute for Nonferrous Metals, Beijing 100088
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| Abstract: |
| Serious interface elements diffusion always lead to TBCs failing ahead of time during servicing at higher temperature. In this paper, TiN film and TiN?AlN film were chosen as TBCs diffusion barrier films and contrast properties to the conventional TBCs. The coat/substrate interface adhesion property of the three systems was investigated by heat shock testing. In order to study on interface elements diffusion properties of the three systems servicing at higher temperature, the systems were treated at 1050 ℃ for 100h firstly, and then interface elements profile was detected by EPMA. Testing results indicated that abscission occurred at bond coat/substrate interface of the system with TiN diffusion barrier films after 135 cycles, and abscission occurred at coat/bond coat interface for the other two systems after 240 cycles. EPMA results indicated that there was serious elements diffusion of the TBCs system without diffusion barrier film，while there was little elements diffusion of the TBCs system with TiN diffusion barrier film and a little elements diffusion of the TBCs system with TiN?AlN diffusion barrier film. |
| Key words: TBCs interdiffusion diffusion barrier films TiN film TiN–AlN film |
