WC-Mo_xC无金属粘结相硬质合金的热压致密化

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Bibliographic Details
Published in中国有色金属学报：英文版 Vol. 22; no. 8; pp. 2027 - 2031
Main Author 张立 陈述 单成 黄方杰 程鑫 马鋆
Format Journal Article
LanguageEnglish
Published 2012
Subjects
WC-MoxC
扩散行为
无粘结相硬质合金
晶粒生长
热压
致密化
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ISSN1003-6326

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Bibliography:ZHANG Li1, CHEN Shu2, SHAN Cheng1, HUANG Fang-jie1, CHENG Xin1, MA Yun1 1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China; 2. Changsha Mining and Metallurgy Research Institute Co., Ltd., Changsha 410012, China
binderless carbide; hot pressing; diffusion behavior; densification; grain growth; WC-MoxC
43-1239/TG
WC-6MoxC-0.47Cr3C2-0.28VC binderless carbide was prepared by hot pressing （1700 °C, 20 MPa）. The sample was observed and analyzed by scanning electron microscopy, energy dispersive X–ray spectroscopy and X–ray diffraction. The results show that during the hot pressing process, W atoms dissolve substantially into the MoxC crystal lattices; whilst, the reverse dissolution of Mo atoms into the WC crystal lattices takes place. Consequently, the main phase and binder phase structure are formed. The phase compositions of the main phase and binder phase are a WC-based solid solution containing Mo and a Mo2C-based solid solution containing W, respectively. The isotropic dissolution and precipitation of W and Mo atoms do not result in substantial carbide coarsening. The mechanism for the densification was discussed.
ISSN:1003-6326