Effects of Temperature and the Incorporation of W on the Oxidation of Zr2 Ceramics
The effects of tungsten additions and temperature on the oxidation behavior of nominally pure ZrB2 and ZrB2 containing 4, 6 or 8mol% of W after oxidation at temperatures ranging from 800 to 1600⁰C were investigated. For pure ZrB2, the protective liquid/glassy layer covering the surface as a result of oxidation was evaporated above 1500⁰C. For (Zr,W)B2 specimens, the liquid/glassy layer was present after exposure up to 1600⁰C. The higher stability of the liquid/glassy phase in the W-containing compositions was attributed to the presence of tungsten in the liquid/glassy phase, resulting in improved oxidation resistance for ZrB2 samples containing W.
M. K. Dehdashti et al., "Effects of Temperature and the Incorporation of W on the Oxidation of Zr2 Ceramics," Corrosion Science, vol. 80, pp. 221-228, Elsevier Limited, Mar 2014.
The definitive version is available at http://dx.doi.org/10.1016/j.corsci.2013.11.030
Materials Science and Engineering
Keywords and Phrases
A. Ceramic; B. SEM, weight loss; C. Oxidation; Effects of temperature; Tungsten
International Standard Serial Number (ISSN)
Article - Journal
© 2014 Elsevier Limited, All rights reserved.