自钝化W-Cr-Y合金层的制备及其抗氧化性能

doi:10.13251/j.issn.0254-6051.2023.01.036

金属热处理 ›› 2023, Vol. 48 ›› Issue (1): 202-206.DOI: 10.13251/j.issn.0254-6051.2023.01.036

自钝化W-Cr-Y合金层的制备及其抗氧化性能

王居庄¹, 吴涛¹, 田林海^1,2, 林乃明¹, 王振霞¹, 秦林¹, 吴玉程³

1.太原理工大学材料科学与工程学院, 山西太原 030024;
2.山西电子科技学院(筹) 新能源与材料工程学院, 山西临汾 041000;
3.合肥工业大学材料科学与工程学院, 安徽合肥 230009

收稿日期:2022-08-09 修回日期:2022-11-02 出版日期:2023-01-25 发布日期:2023-02-03
通讯作者: 田林海,教授,博士,E-mail:tianlinhai@tyut.edu.cn
作者简介:王居庄(1997—),男,硕士研究生,主要研究方向为薄膜材料及表面工程,E-mail:939474124@qq.com。
基金资助:
国家自然科学基金(52020105014)

Preparation of self-passivation W-Cr-Y alloy layer and its oxidation resistance

Wang Juzhuang¹, Wu Tao¹, Tian Linhai^1,2, Lin Naiming¹, Wang Zhenxia¹, Qin Lin¹, Wu Yucheng³

1. School of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan Shanxi 030024, China;
2. School of New Energy and Materials Engineering, Shanxi Electronic Science and Technology Institute (Preparation), Linfen Shanxi 041000, China;
3. School of Materials Science and Engineering, Hefei University of Technology, Hefei Anhui 230009, China

Received:2022-08-09 Revised:2022-11-02 Online:2023-01-25 Published:2023-02-03

摘要/Abstract

摘要： 为防止或缓解钨氧化,用双辉等离子体表面冶金技术在纯钨基材表面制备了W-Cr-Y自钝化合金层。采用扫描电镜(SEM)和X射线衍射仪(XRD)对合金层的组织和相结构进行了分析,并在模拟发生核聚变发电站冷却失效事故时的高温大气环境下对合金层的抗氧化性能进行了研究。结果表明,制备温度为800、900、1000和1100 ℃时,均成功地在纯钨表面形成了由W(Cr, Y)固溶体构成的厚度超过20 μm的W-Cr-Y合金层。制备温度为1000 ℃时合金层厚度达到了35 μm,表面光滑致密,合金层与纯钨基体呈现良好、无缺陷的冶金结合。制备温度较低(800 ℃和900 ℃)时,合金层在1000 ℃氧化10 h后的表面未形成连续的自钝化合金层,抗氧化性能较差。制备温度较高(1000 ℃和1100 ℃)时,合金层在氧化后形成了致密平整的氧化层,且制备温度为1000 ℃时合金层氧化后的质量增加最小,抗氧化效果最优。

关键词: 第一壁材料, 自钝化合金, 双辉等离子体表面冶金技术, 高温抗氧化

Abstract: In order to prevent or alleviate the oxidation of tungsten oxidation, a W-Cr-Y self-passivation alloy layer was prepared on the surface of pure tungsten by using double-glow plasma surface metallurgy technology. The microstructure and phase compositions of W-Cr-Y alloy layer were analyzed by means of scanning electron microscopy (SEM) and X-ray diffraction (XRD). The oxidation resistance of the alloy layer was studied under a high temperature atmospheric condition which simulating the cooling failure accident of the nuclear fusion power station. The results show that when the preparation temperature is 800, 900,1000, 1100 ℃, respectively, the W-Cr-Y alloy layer with a thickness of more than 20 μm and composed of W(Cr, Y) solid solution is all successfully formed on the surface of pure tungsten. Moreover, the thickness of the alloy layer prepared at 1000 ℃reaches 35 μm, the surface is smooth and compact, and an excellent defect free metallurgical bonding is obtained between the alloy layer and the tungsten matrix. After oxidation at 1000 ℃ for 10 h, no continuous self-passivation alloy layer is formed on the surface of the W-Cr-Y alloy layer prepared at low temperatures (800 ℃ and 900 ℃), and the oxidation resistance is poor, however,a compact and flat oxide skin is formed on the surface of the alloy layer prepared at high temperatures (1000 ℃ and 1100 ℃). The W-Cr-Y alloy layer prepared at 1000 ℃ has the minimum oxidation mass gain and the optimal antioxidant effect.

Key words: first wall material, self-passivating alloy, double glow plasma surface metallurgy technology, high temperature oxidation resistance

中图分类号:

TG146.4

王居庄, 吴涛, 田林海, 林乃明, 王振霞, 秦林, 吴玉程. 自钝化W-Cr-Y合金层的制备及其抗氧化性能[J]. 金属热处理, 2023, 48(1): 202-206.

Wang Juzhuang, Wu Tao, Tian Linhai, Lin Naiming, Wang Zhenxia, Qin Lin, Wu Yucheng. Preparation of self-passivation W-Cr-Y alloy layer and its oxidation resistance[J]. Heat Treatment of Metals, 2023, 48(1): 202-206.

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自钝化W-Cr-Y合金层的制备及其抗氧化性能

Preparation of self-passivation W-Cr-Y alloy layer and its oxidation resistance

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