Title

Effects of Temperature and the Incorporation of W on the Oxidation of Zr2 Ceramics

Abstract

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.

Department(s)

Materials Science and Engineering

Keywords and Phrases

A. Ceramic; B. SEM, weight loss; C. Oxidation; Effects of temperature; Tungsten

International Standard Serial Number (ISSN)

0010938X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2014 Elsevier Limited, All rights reserved.

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