Synthesis of W2C by reactive hot pressing and its mechanical properties
Synthesis of W2C by reactive hot pressing and its mechanical properties
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DOI：
10.2320/matertrans.mra2007304
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发表时间：
2008-06-01
影响因子：
1.2
通讯作者：
Kodaira, Yuichiro
中科院分区：
文献类型：
--
作者：
Taimatsu, Hitoshi;Sugiyama, Shigeaki;Kodaira, Yuichiro
采用放电等离子烧结技术，以钨粉和碳化钨粉为原料，通过反应烧结制备了不含或含有少量钨或碳化钨的半硬质合金W2C。测定了烧结体的物相、密度、显微结构、弹性模量、硬度和断裂韧性。W2C相的稳定区域在1860 ℃以下具有窄的碳含量。W2C具有0.286的泊松比，并且从真密度和体积密度依赖性确定其在零孔隙率下的杨氏模量为444GPa。这些值表明W2C具有与W相似的弹性变形行为。
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 degrees 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.