CaO/MgO双层膜形成对高温原位残余应力测定Mg-Al-Ca合金不燃性和抗氧化性的影响

IF 7.4 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Shin-ichi Inoue , Loku Singgappulige Rosantha Kumara , Yoshihito Kawamura
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引用次数: 0

摘要

通过TEM观察和高温原位残余应力测量,研究了Mg-Al-Ca-Mn合金氧化膜结构与氧化膜保护性能的关系。在773 K时,表面形成一层CaO单层膜。然后,在823 K上方形成CaO/MgO双层膜。在CaO单层薄膜上,由于合金衬底的热膨胀而产生拉伸应力。然而,一旦MgO内层形成,拉应力松弛,压应力作用于CaO外层。此外,合金熔化后,内部的MgO层作为外部CaO层的支架,强大的压应力继续作用于外部CaO层。这说明CaO/MgO双分子层由于具有较强的压应力,在熔融后可以很容易地保持其坚固性和保护性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of CaO/MgO bilayer film formation on nonflammability and oxidation resistance of Mg–Al–Ca alloys determined by high-temperature in situ residual stress measurement
In this study, the relationship between the oxide film structure and the protective properties of the oxide film of Mg–Al–Ca–Mn alloys was investigated by TEM observation and high-temperature in situ residual stress measurements. At 773 K, a CaO monolayer film formed on the surface. Then, a CaO/MgO bilayer film formed above 823 K. On the CaO monolayer film, tensile stress acted owing to the thermal expansion of the alloy substrate. Nevertheless, once the inner MgO layer formed, the tensile stress was relaxed, and compressive stress acted on the outer CaO layer. Additionally, the inner MgO layer acted as a scaffold for the outer CaO layer after the alloy melted, and strong compressive stress continued acting on the outer CaO layer. This suggests that the CaO/MgO bilayer can easily maintain its soundness and protectivity after melting because of the strong compressive stress.
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来源期刊
Corrosion Science
Corrosion Science 工程技术-材料科学:综合
CiteScore
13.60
自引率
18.10%
发文量
763
审稿时长
46 days
期刊介绍: Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.
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