Oxidation Kinetics Researches under the Condition of Compressive Loading

2018 2nd International Conference on Advanced Technologies in Manufacturing and Materials Engineering

Zhou, C.H.^1 ; Pan, R.Y.^1 ; Ma, H.T.^2 ; Zhang, H.^1 ; Guan, X.G.^1 ; Mao, N.N.^1 ; Sun, F.J.^1

School of Materials Science and Engineering, Heilongjiang University of Science and Technology, Harbin

150022, China^1

School of Materials Science and Engineering, Dalian University of Technology, Dalian

116085, China^2

关键词: Compressive loading;    External loading;    High temperature oxidation Behavior;    Initial oxidation;    Oxidation kinetics;    Oxide kinetics;    Short circuit paths;    Thin oxide layers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/389/1/012017/pdf
DOI  :  10.1088/1757-899X/389/1/012017

来源: IOP

【 摘 要 】

High temperature oxidation behavior of alloys is mostly affected by an external loading. The growth of oxide scale, oxide products, interfacial reactions and other characteristics have be affirmed to be affected by the external loading. Here, it provided the oxidation kinetics of several metals under the compressive loading. And the growth of oxide scale was distinguished in the form of thin oxide layer and thick oxide layer. Different compressive effect on the growth of oxide scale was summarized. At the initial oxidation stage, the applied compressive stress induced more defects on the surface of alloy, supplying more oxide neclei, thereby increased the growth of the thin oxide layer. In the case of the growth of the thick oxide layer, it was attrbuted to the short circuit paths of the oxide grain boudary inherited from the initial oxidation stage and the cracks or other defects deduced by the applied compressive stress. Thus the oxide kinetics of alloys was promoted. However, considering the interfacial reaction at scale/metal, the coarsens of vacancies would occur after a long time of oxidation, decreasing the growth of oxide scale.