| Al含量变化对CoNiCrAlYRe合金氧化行为的影响 |
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| 引用本文： | 兰 昊,杨志刚,张玉朵,张 弛.Al含量变化对CoNiCrAlYRe合金氧化行为的影响[J].稀有金属材料与工程,2011,40(1):85-89. |
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| 作者姓名： | 兰 昊 杨志刚 张玉朵 张 弛 |
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| 作者单位： | 清华大学,新型陶瓷与精细工艺国家重点实验室,北京,100084 |
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| 基金项目： | 天津工业大学自然科学基金 |
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| 摘 要： | 利用X射线衍射仪、扫描电镜和能谱分析研究不同铝含量的CoNiCrAlYRe合金在1000℃空气中的恒温氧化行为。结果表明:铝含量的增加促进了合金中富Cr相在γ、β相界面处的析出;铝含量的增加显著抑制了尖晶石氧化物的形成;高铝含量合金中存在的富Cr层有利于致密氧化膜的形成,从而降低了氧化速率,提高了合金的抗氧化性能。
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| 关 键 词： | Al CoNiCrAlYRe合金 氧化行为 |
| 收稿时间： | 2010/1/15 0:00:00 |
Influences of Al Content on Oxidation Behavior of CoNiCrAlYRe Alloys |
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| Lan Hao,Yang Zhigang,Zhang Yuduo and Zhang Chi.Influences of Al Content on Oxidation Behavior of CoNiCrAlYRe Alloys[J].Rare Metal Materials and Engineering,2011,40(1):85-89. |
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| Authors: | Lan Hao Yang Zhigang Zhang Yuduo and Zhang Chi |
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| Affiliation: | State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China |
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| Abstract: | Isothermal oxidation behavior of CoNiCrAlYRe alloys with different aluminum content at 1000 oC in air was investigated by X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy analysis. The results show that increasing of the aluminum content induces the Cr-rich phase to precipitate at the γ/β interfaces. The formation of the spinel oxide scales is significantly suppressed by the increase of the aluminum content. The existence of the Cr-rich layer is beneficial for the formation of a compact oxide layer of the alloy with high aluminum content, which lowers the oxidation rate and improves oxidation resistance. |
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| Keywords: | aluminum CoNiCrAlYRe alloy oxidation behavior |
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