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High-Temperature Oxidation Behavior of a Polycrystalline Ti2SnC Ceramic

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Abstract

The isothermal-oxidation behavior of polycrystalline Ti2SnC at 500–800°C in air has been investigated. The growth of the oxide scale on Ti2SnC from 500°C to 700°C obeyed a parabolic law, whereas at 800°C it was a two-step parabolic process. Microstructure and composition analysis on the surface and sectioned samples demonstrated that the oxidation of Ti2SnC was controlled by outward diffusion of titanium and carbon, and inward diffusion of oxygen. As the oxidation continued the oxygen potential in the inner layer was low, and metallic Sn was stable as an interfacial layer between the oxide scale and the Ti2SnC matrix. This work confirmed the presence of metallic Sn in the oxidized Ti2SnC and explained why metallic Sn was stable in the oxidized Ti2SnC sample.

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Correspondence to Y. C. Zhou.

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Zhou, Y.C., Dong, H.Y. & Wang, X.H. High-Temperature Oxidation Behavior of a Polycrystalline Ti2SnC Ceramic. Oxidation of Metals 61, 365–377 (2004). https://doi.org/10.1023/B:OXID.0000032329.73914.55

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  • DOI: https://doi.org/10.1023/B:OXID.0000032329.73914.55

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