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Thermal expansion and stability of Ti2SC in air and inert atmospheres
Journal article   Peer reviewed

Thermal expansion and stability of Ti2SC in air and inert atmospheres

Shrinivas R. Kulkarni, Marco Merlini, Nishad Phatak, Surendra K. Saxena, Gilberto Artioli, Shahram Amini and Michel. W. Barsoum
Journal of alloys and compounds, v 469(1-2), pp 395-400
05 Feb 2009
DOI: https://doi.org/10.1016/j.jallcom.2008.01.150

Abstract

Chemistry Chemistry, Physical Materials Science Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Physical Sciences Science & Technology Technology
The thermal expansion and stability of predominantly single-phase Ti2SC powders in argon and air was investigated by Rietveld analysis of synchrotron X-ray diffraction spectra. When the sample was heated in an Ar atmosphere, it started to dissociate into TiS2 (see footnote 1) at approximate to 400 degrees C. At 8.5 (5) x 10(-6) degrees C-1 and 8.8 (2) x 10(-6) degrees C-1 the thermal expansion coefficients along the a and c-directions, respectively, are quite similar. The volumetric thermal expansion is 25.2 (5) x 10(-6) degrees C-1. When Ti2SC was heated in air, it started to oxidize, at 400 degrees C, first to anatase, which converts, at higher temperatures, to rutile. The sulfur and carbon atoms presumably diffuse outward and escape as gases. (C) 2008 Elsevier B.V. All rights reserved.

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Chemistry, Physical
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
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