| Ta-W合金Si-Cr-Ti-Zr涂层组织结构与氧化行为 |
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| 引用本文： | 肖来荣,刘建飞,缪瑶,郭子维,王星宇,谭嘉懿,唐新阳,蔡圳阳,赵小军.Ta-W合金Si-Cr-Ti-Zr涂层组织结构与氧化行为[J].矿冶工程,2018,38(6):134-138. |
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| 作者姓名： | 肖来荣 刘建飞 缪瑶 郭子维 王星宇 谭嘉懿 唐新阳 蔡圳阳 赵小军 |
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| 作者单位： | 1.中南大学 材料科学与工程学院,湖南 长沙 410083;
2.有色金属材料科学与工程教育部重点实验室,湖南 长沙 410083 |
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| 基金项目： | 国家科技重大专项(0101040201);
国家自然科学基金重点项目(U1637210);
中南大学创新驱动计划项目(51271203) |
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| 摘 要： | 采用料浆烧结法在Ta-10W合金表面制备了Si-Cr-Ti-Zr涂层,利用内热法在大气环境下测试了涂层在1 400 ℃的抗氧化性能,通过扫描电镜、电子探针和波谱分析等手段分析了Ta-10W合金Si-Cr-Ti-Zr涂层氧化前后的微观形貌与组织结构。结果表明：原始涂层呈3层结构,从表面到基体的组织依次为(Zr,Cr,Ti)Si2→(Ta,W)Si2→(Ta,W)5Si3→Ta合金; 1 400 ℃高温下保持10 h,涂层仍可有效防护钽合金基体不失效; 涂层高温抗氧化机理在于形成了致密的(Si,Zr,Cr,Ti)O2复合氧化膜,有效减缓了氧元素向内扩散的速率。
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| 关 键 词： | 钽钨合金 硅化物涂层 Si-Cr-Ti-Zr 高温氧化 料浆烧结法 氧化动力学 |
| 收稿时间： | 2018-06-23 |
Structure and Oxidation Behavior of Si-Cr-Ti-Zr Coating Prepared on Ta-W Alloy |
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| XIAO Lai-rong,LIU Jian-fei,MIU Yao,GUO Zi-wei,WANG Xing-yu,TAN Jia-yi,TANG Xin-yang,CAI Zhen-yang,ZHAO Xiao-jun.Structure and Oxidation Behavior of Si-Cr-Ti-Zr Coating Prepared on Ta-W Alloy[J].Mining and Metallurgical Engineering,2018,38(6):134-138. |
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| Authors: | XIAO Lai-rong LIU Jian-fei MIU Yao GUO Zi-wei WANG Xing-yu TAN Jia-yi TANG Xin-yang CAI Zhen-yang ZHAO Xiao-jun |
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| Affiliation: | 1.School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China;
2.Key Laboratory of Non-ferrous Metals Materials Science and Engineering, Ministry of Education, Changsha 410083, Hunan, China |
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| Abstract: | Si-Ti-Cr-Zr coating was prepared on the surface of Ta-10W substrate by slurry sintering method. High temperature oxidation resistance of the coating was tested using internal heating method at 1 400 ℃ in the atmospheric environment. The morphology and microstructure of the Si-Ti-Cr-Zr coating before and after oxidation were compared using scanning electron microscope, electronic probe and spectrum analysis. The results showed that the coating structure from surface to matrix was in an order of (Zr,Cr,Ti)Si2→(Ta,W)Si2→(Ta,W)5Si3→Ta alloy. Coating could still effectively protect tantalum alloy after having been held at 1 400 ℃ for 10 h. The mechanism of resistance to high temperature oxidation was the formation of a compact (Si,Zr,Cr,Ti)O2 composite oxide film, which effectively decreased the diffusion rate of oxygen. |
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| Keywords: | Ta-W alloy silicide coating Si-Cr-Ti-Zr high temperature oxidation slurry sintering method oxidation dynamics |
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