Science et Ingénierie des Matériaux et Procédés, INPGrenoble-CNRS-UJF, BP75, 38402, Saint-Martin d'Hères, France.
Micron. 2010 Jul;41(5):472-7. doi: 10.1016/j.micron.2010.01.013. Epub 2010 Feb 13.
This study reports a determination of the polarity of WC facets in WC-Co alloys sintered at the liquid state. In these alloys, WC grains are delimited by basal facets and two sets of {10 10} prismatic facets, one set of facets being much more developed than the other. A variation of the shape is observed as a function of the composition of the alloy. High resolution transmission electron microscopy is used to investigate the polarity of the prismatic facets owing to the typical triangular patterns appearing on the images. The effect of the composition is investigated using two alloys with different carbon potentials and one containing VC and Cr(3)C(2) as grain growth inhibitors. The interpretation of the images shows that in all cases, the same set of prismatic planes is favoured.
本研究报告了在液相烧结的 WC-Co 合金中 WC 面的极性测定。在这些合金中，WC 晶粒被基面和两组 {10 10} 棱柱面限定，其中一组面比另一组更发达。随着合金成分的变化，观察到形状的变化。高分辨率透射电子显微镜用于研究棱柱面的极性，因为在图像上出现典型的三角形图案。使用具有不同碳势的两种合金和一种含有 VC 和 Cr(3)C(2)作为晶粒生长抑制剂的合金来研究成分的影响。对图像的解释表明，在所有情况下，都优先选用同一组棱柱面。
