| T91钢超音速电弧喷涂45CT涂层在90%Ar+10%H2O气氛中的循环氧化行为 |
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| 引用本文： | 刘光明,汪海云,黄蜜,田继红,杜楠. T91钢超音速电弧喷涂45CT涂层在90%Ar+10%H2O气氛中的循环氧化行为[J]. 表面技术, 2011, 40(3): 1-4 |
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| 作者姓名： | 刘光明 汪海云 黄蜜 田继红 杜楠 |
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| 作者单位： | 南昌航空大学无损检测技术教育部重点实验室,南昌,330063;中国兵器工业第五九研究所,重庆,400039 |
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| 基金项目： | 无损检测技术教育部重点实验室项目(2007ZE56009) |
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| 摘 要： | 采用超音速电弧喷涂方法在T91钢上制备了45CT涂层,研究了样品在800℃和850℃的90%Ar+10%H2O气氛中的循环氧化行为,利用XRD和SEM/EDS分析了涂层氧化前后的表面成分和结构。结果表明:氧化后表面的氧化物主要由Cr2O3,NiCr2O4及NiO组成,850℃氧化后的表面氧化物还含有Fe2O3;45CT涂层在800℃下表现出良好的抗氧化性能,而在850℃氧化时,涂层出现裂纹,Fe通过裂纹快速向外扩散,导致涂层在氧化过程中失效。
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| 关 键 词： | 45CT涂层 水蒸气 循环氧化 |
The Cyclic Oxidation Behavior of Supersonic Arc Sprayed 45CT Coating on T91 Steel in 90%Ar-10%H2O |
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| LIU Guang-ming,WANG Hai-yun,HUANG Mi,TIAN Ji-hong,DU Nan. The Cyclic Oxidation Behavior of Supersonic Arc Sprayed 45CT Coating on T91 Steel in 90%Ar-10%H2O[J]. Surface Technology, 2011, 40(3): 1-4 |
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| Authors: | LIU Guang-ming WANG Hai-yun HUANG Mi TIAN Ji-hong DU Nan |
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| Affiliation: | LIU Guang-ming1,WANG Hai-yun1,HUANG Mi2,TIAN Ji-hong1,DU Nan1(1.Key Laboratory of Nondestructive Testing,Ministry of Education,Nanchang Hangkong University,Nanchang 330063,China,2.No.59 Institute of China Ordnance Industry,Chongqing 400039,China) |
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| Abstract: | 45CT coating was prepared on T91 steel by supersonic arc spraying process.The cyclic oxidation tests of the coated samples were conducted in 90%Ar+10%H2O atmosphere at 800℃ and 850℃,respectively.The morphology,microstructures and composition of the coating and oxide scales were examined by XRD and SEM/EDS.It is shown that after oxidation at 800℃ the oxides formed on the coated samples are mainly composed of Cr2O3,NiCr2O4 and NiO,however Fe2O3 is detected after oxidation at 800℃.The coated samples exhibite good cyclic oxidation resistance at 800 ℃.When the coated samples oxidized at 850℃ many cracks are observed in the coatings,Fe diffuses outward through the cracks to form iron oxide,which leads to coating failure during oxidation. |
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| Keywords: | 45CT coating water vapor cyclic oxidation |
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