On the formation of WC1-x in nanocrystalline cemented carbides

被引：34

作者：

Gao, Yang ^{[1
]}

Song, Xiaoyan ^{[1
]}

Liu, Xuemei ^{[1
]}

Wei, Chongbin ^{[1
]}

Wang, Haibin ^{[1
]}

Guo, Guangsheng ^{[1
]}

机构：

[1] Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Educ Minist China, Beijing 100124, Peoples R China

来源：

SCRIPTA MATERIALIA | 2013年 / 68卷 / 02期

基金：

北京市自然科学基金; 中国国家自然科学基金;

关键词：

Cemented carbides; Nanocrystalline; Interface; Orientation relationship; TUNGSTEN;

D O I：

10.1016/j.scriptamat.2012.09.016

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In contrast to the general assumption that the WC1-x, phase is stable only at temperatures above 2500 degrees C, in the present study WC1-x is discovered to exist stably at room temperature in nanocrystalline cemented carbides. Based on characterization of the microstructure, crystallographic features and orientation relationships, the formation mechanism for the WC1-x phase in the nanocrystalline structure is proposed, and the conditions of the surface energy and composition are discussed. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：108 / 110

页数：3

共 14 条

[1] Co-phase penetration of WC(10(1)over-bar-0)/WC(10(1)over-bar-0) grain boundaries from first principles -: art. no. 115415 [J].

Christensen, M ;

Wahnström, G .

PHYSICAL REVIEW B, 2003, 67 (11) :11

[2] Synthesis, sintering, and mechanical properties of nanocrystalline cemented tungsten carbide - A review [J].

Fang, Z. Zak ;

Wang, Xu ;

Ryu, Taegong ;

Hwang, Kyu Sup ;

Sohn, H. Y. .

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2009, 27 (02) :288-299

[3] Extracting convergent surface energies from slab calculations [J].

Fiorentini, V ;

Methfessel, M .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1996, 8 (36) :6525-6529

[4] Enhancement of electrocatalytic activity of platinum for hydrogen oxidation reaction by sonochemically synthesized WC1-x nanoparticles [J].

Kim, Juyeong ;

Jang, Ji-Hoon ;

Lee, Yang-Hee ;

Kwon, Young-Uk .

JOURNAL OF POWER SOURCES, 2009, 193 (02) :441-446

[5] Tungsten carbides and W-C phase diagram [J].

Kurlov, AS ;

Gusev, AI .

INORGANIC MATERIALS, 2006, 42 (02) :121-127

[6] Theoretical study on the electronic properties and stabilities of low-index surfaces of WC polymorphs [J].

Li, Yefei ;

Gao, Yimin ;

Xiao, Bing ;

Min, Ting ;

Fan, Zijian ;

Ma, Shengqiang ;

Yi, Dawei .

COMPUTATIONAL MATERIALS SCIENCE, 2011, 50 (03) :939-948

[7] Thermodynamic analysis for in situ synthesis of WC-Co composite powder from metal oxides [J].

Liu, Wenbin ;

Song, Xiaoyan ;

Zhang, Jiuxing ;

Zhang, Guozhen ;

Liu, Xuemei .

MATERIALS CHEMISTRY AND PHYSICS, 2008, 109 (2-3) :235-240

[8] Quantitative characterization of the microstructure and properties of nanocrystalline WC-Co bulk [J].

Liu, Xuemei ;

Song, Xiaoyan ;

Wei, Chongbin ;

Gao, Yang ;

Wang, Haibin .

SCRIPTA MATERIALIA, 2012, 66 (10) :825-828

[9] Designing meaningful density functional theory calculations in materials science - a primer [J].

Mattsson, AE ;

Schultz, PA ;

Desjarlais, MP ;

Mattsson, TR ;

Leung, K .

MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING, 2005, 13 (01) :R1-R31

[10] C-W (Carbon-Tungsten) [J].

Okamoto, H. .

JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION, 2008, 29 (06) :543-544

← 1 2 →