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材料工程  2014, Vol. 0 Issue (5): 66-72    DOI: 10.11868/j.issn.1001-4381.2014.05.012
  材料与工艺 本期目录 | 过刊浏览 | 高级检索 |
DZ40M合金表面纳米和垂直裂纹结构热障涂层的抗燃气热腐蚀性能
何箐, 屈轶, 汪瑞军, 王伟平
中国农业机械化科学研究院 表面工程技术研究所, 北京 100083
Gas Hot-corrosion Resistance of Nanostructure and Segmentation Thermal Barrier Coatings on DZ40M Superalloy
HE Qing, QU Yi, WANG Rui-jun, WANG Wei-ping
Surface Engineering Research Institute, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
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摘要 采用超音速火焰喷涂技术在定向凝固DZ40M钴基高温合金表面喷涂NiCrAlY金属粘接层,以纳米7YSZ团聚粉末为原料,分别利用大气等离子喷涂技术在粘接层表面制备了纳米结构和垂直裂纹结构7YSZ涂层,研究了高温合金基体和带涂层的基体在900℃下的燃气热腐蚀性能,分析了合金和涂层的燃气热腐蚀产物和过程。结果表明:两种结构热障涂层均大幅度提高了DZ40M合金的抗燃气热腐蚀性能,可避免基体在高温燃气热腐蚀中产生大量易剥离的腐蚀产物和氧化腐蚀孔洞;两种结构涂层在燃气热腐蚀后仍然保持完整并具有相近的燃气热腐蚀速率,垂直裂纹结构涂层中垂直于基体的贯穿裂纹在提高涂层应变容限的同时,并不会成为腐蚀介质快速渗入的通道。
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何箐
屈轶
汪瑞军
王伟平
关键词 DZ40M高温合金热障涂层垂直裂纹燃气热腐蚀    
Abstract:The NiCrAlY bond coating was prepared by high velocity oxygen-fuel spray(HVOF) on the surface of directionally solidified DZ40M Co-based superalloy, and nanostructure and segmentation structure 7YSZ top coating were prepared by atmosphere plasma spray(APS) from nano-agglomerated powder. Gas hot-corrosion resistance of DZ40M alloy and alloy with different structure thermal barrier coatings(TBCs) at 900℃ was studied. Corrosion products and corrosion process were analyzed. The results show that DZ40M alloy with TBCs has more excellent gas hot-corrosion resistance than that of the alloy without coating, and avoid many easily detached corrosion products and corrosion voids in DZ40M alloy under gas hot-corrosion process. The coatings with different structure remain intact after gas hot-corrosion, and hot corrosion rate is almost appropinquity of DZ40M alloy with two kinds top coating. The coating with segmentation crack can prolong strain tolerance and thermal cycle life, but the vertical cracks are unable to become a passage for corrosive medium rapid infiltration.
Key wordsDZ40M superalloy    thermal barrier coating    segmentation crack    gas hot-corrosion
收稿日期: 2012-10-15     
1:  TG174.4  
作者简介: 何箐(1983- ),男,博士研究生,工程师,主要从事热障涂层方面研究工作,联系地址:北京市朝阳区北沙滩1号中国农业机械化科学研究院表面所(100083),E-mail:heqing68@gmail.com
引用本文:   
何箐, 屈轶, 汪瑞军, 王伟平. DZ40M合金表面纳米和垂直裂纹结构热障涂层的抗燃气热腐蚀性能[J]. 材料工程, 2014, 0(5): 66-72.
HE Qing, QU Yi, WANG Rui-jun, WANG Wei-ping. Gas Hot-corrosion Resistance of Nanostructure and Segmentation Thermal Barrier Coatings on DZ40M Superalloy. Journal of Materials Engineering, 2014, 0(5): 66-72.
链接本文:  
http://jme.biam.ac.cn/jme/CN/10.11868/j.issn.1001-4381.2014.05.012      或      http://jme.biam.ac.cn/jme/CN/Y2014/V0/I5/66
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