砷铸镍铝和镍铝-(铬、钼)共晶合金在 1000°C 时的等温抗氧化性

IF 2.1 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
JOM Pub Date : 2024-10-03 DOI:10.1007/s11837-024-06893-9
Shupeng Xu, Junjun Wang, Jian Peng, Xiang Guo, Long Liu, Zhigang Xu, Wenjun Li, Qiang Shen, Chuanbin Wang
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引用次数: 0

摘要

研究了铸态镍铝、镍铝-34Cr和镍铝-28Cr-6Mo在1000°C下100小时的等温抗氧化性,并讨论了相应的氧化机理。铸态 NiAl、NiAl-34Cr 和 NiAl-28Cr-6Mo 的抛物线速率常数分别为 6.045 × 10-15、1.397 × 10-14 和 1.052 × 10-14 g2/cm4-s。在 NiAl、NiAl-34Cr 和 NiAl-28Cr-6Mo 上生成的氧化物鳞片主要是θ-Al2O3,其中有一定量的稳定α-Al2O3。在镍铝中添加铬可加速θ-α转变,当用钼取代6%铬时,这种效果会进一步增强。因此,在 1000°C 等温抗氧化性方面,NiAl-28Cr-6Mo 优于 NiAl 和 NiAl-34Cr。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Isothermal Oxidation Resistance of As-cast NiAl and NiAl-(Cr, Mo) Eutectic Alloys at 1000°C

The isothermal oxidation resistance of as-cast NiAl, NiAl-34Cr, and NiAl-28Cr-6Mo was investigated at 1000°C for 100 h. The corresponding oxidation mechanism is discussed. The parabolic rate constants of as-cast NiAl, NiAl-34Cr, and NiAl-28Cr-6Mo were 6.045 × 10−15, 1.397 × 10−14, and 1.052 × 10−14 g2/cm4·s, respectively. The generated oxide scales on NiAl, NiAl-34Cr, and NiAl-28Cr-6Mo are dominated by metastable θ-Al2O3 with a certain amount of stable α-Al2O3. The addition of Cr in NiAl can accelerate the θ-α transformation and such an effect is further enhanced when replacing 6 at.% Cr with Mo. Thus, NiAl-28Cr-6Mo outperforms NiAl and NiAl-34Cr concerning isothermal oxidation resistance at 1000°C.

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来源期刊
JOM
JOM 工程技术-材料科学:综合
CiteScore
4.50
自引率
3.80%
发文量
540
审稿时长
2.8 months
期刊介绍: JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.
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