Synthesis of W2C by Reactive Hot Pressing and Its Mechanical Properties

Hitoshi Taimatsu; Shigeaki Sugiyama; Yuichiro Kodaira

doi:10.2320/matertrans.MRA2007304

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Synthesis of W₂C by Reactive Hot Pressing and Its Mechanical Properties

Hitoshi Taimatsu, Shigeaki Sugiyama, Yuichiro Kodaira

著者情報

キーワード: tungsten hemicarbide, sintering, hot pressing, density, mechanical properties, phase diagram

ジャーナル認証あり早期公開

論文ID: MRA2007304

DOI https://doi.org/10.2320/matertrans.MRA2007304

この記事には本公開記事があります。

The final version of this article is now available: Vol. 49 (2008) , No. 6 p.1256

詳細

抄録

Tungsten hemicarbide W₂C with no or small amounts of W or WC was prepared by reaction-sintering from W and WC powders using a resistance-heated hot-pressing technique called spark plasma sintering. The product phases, density, microstructure, elastic moduli, hardness, and fracture toughness of the sintered bodies were determined. The stable region of the W₂C phase had a narrow carbon content below 1860°C. W₂C had a Poisson’s ratio of 0.286, and its Young’s modulus at zero porosity was determined to be 444 GPa from the true density and bulk density dependence. These values suggest that W₂C has elastic deformation behavior similar to that of W.

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