稀土元素Ce与Y对JG4246A合金高温氧化行为的影响

doi:10.13251/j.issn.0254-6051.2023.05.013

金属热处理 ›› 2023, Vol. 48 ›› Issue (5): 78-82.DOI: 10.13251/j.issn.0254-6051.2023.05.013

稀土元素Ce与Y对JG4246A合金高温氧化行为的影响

陈崇林, 王均安, 余建波, 涂玉国, 张朦, 李梦丽

上海大学材料研究所, 上海 200072

收稿日期:2022-11-04 修回日期:2023-03-31 出版日期:2023-05-25 发布日期:2023-06-21
通讯作者: 王均安,研究员,E-mail: jawang@shu.edu.cn
作者简介:陈崇林(1997—),男,硕士研究生,主要研究方向为稀土对高温氧化行为的影响,E-mail: 1572674310@qq.com。
基金资助:
航空发动机及燃气轮机重大专项(HT-J2019-VI-0023-0140)

Effects of rare earth elements Ce and Y on high temperature oxidation behavior of JG4246A alloy

Chen Chonglin, Wang Jun'an, Yu Jianbo, Tu Yuguo, Zhang Meng, Li Mengli

Institute of Materials, Shanghai University, Shanghai 200072, China

Received:2022-11-04 Revised:2023-03-31 Online:2023-05-25 Published:2023-06-21

摘要/Abstract

摘要： 在第二代高温合金JG4246A中分别添加不同含量的稀土元素Ce和Y,得到含0.012Ce(质量分数,%,下同)、0.017Ce、0.034Y、0.061Y四种合金铸锭,研究了在1100 ℃下Ce与Y对合金高温抗氧化性能的影响。采用X射线衍射仪(XRD)及扫描电镜(SEM)分析了氧化膜的物相组成以及氧化表面的形貌。结果表明,JG4246A合金在1100 ℃空气中恒温氧化过程中,添加稀土元素可以减少合金的氧化质量增加,氧化动力学符合抛物线规律;相对于稀土元素Y,Ce对减缓JG4246A合金的高温氧化速率的作用更显著;稀土元素的添加没有改变氧化膜的表面形貌,但是生成的尖晶石型氧化物使氧化膜更加致密,能够抑制阳离子的向外扩散,降低氧化反应速率,从而提高高温抗氧化性能。

关键词: 稀土元素, JG4246A合金, 恒温氧化, 氧化动力学

Abstract: In the secondary generation superalloy JG4246A, rare earth elements Ce and Y were added to obtain four kinds of tested alloy ingots with addition of 0.012Ce (mass fraction, %, the same below), 0.017Ce, 0.034Y and 0.061Y, respectively. The effects of Ce and Y on high temperature oxidation resistance of these alloys at 1100 ℃ were studied. The phase composition and the morphology of oxidized surface were analyzed by means of X-ray diffractometer (XRD) and scanning electron microscope (SEM). The results indicate that the oxidation mass gain of the JG4246A alloy can be reduced by adding rare earth elements during the isothermal oxidation process at 1100 ℃ in air, and the oxidation kinetics of the JG4246A alloys conforms to parabolic law. Compared to the rare earth element Y, Ce has a more significant effect on slowing down the high temperature oxidation rate of the JG4246A alloy. The addition of rare earth elements does not change the surface morphology of the oxide film, but the spinel oxide makes the oxide film more compact, which can inhibit the outward diffusion of cations and reduce the oxidation reaction rate, thus improving the oxidation resistance at high temperature.

Key words: rare earth element, JG4246A alloy, isothermal oxidation, oxidation kinetics

中图分类号:

TG132.3

陈崇林, 王均安, 余建波, 涂玉国, 张朦, 李梦丽. 稀土元素Ce与Y对JG4246A合金高温氧化行为的影响[J]. 金属热处理, 2023, 48(5): 78-82.

Chen Chonglin, Wang Jun'an, Yu Jianbo, Tu Yuguo, Zhang Meng, Li Mengli. Effects of rare earth elements Ce and Y on high temperature oxidation behavior of JG4246A alloy[J]. Heat Treatment of Metals, 2023, 48(5): 78-82.

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稀土元素Ce与Y对JG4246A合金高温氧化行为的影响

Effects of rare earth elements Ce and Y on high temperature oxidation behavior of JG4246A alloy

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