石墨烯掺杂对WC(0001)-Co硬质合金晶相界面结合性能的影响

doi:10.11896/cldb.19090172

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Abstract Based on the first-principles method, the interfacial adhesion work and fracture toughness of WC(0001)-Co, WC(0001)-Co/sGR and WC(0001)-Co/dGR crystalline phases were calculated. The results show that WC(0001)/Co_(sGR) interface has the largest adhesion work of 6.355 1 J·m^-2 in WC(0001)-Co/sGR and the maximum fracture toughness of 6.437 6 J·m^-2 in WC phase, so the structure is the most stable and interface bonding properties is the best. The interfacial adhesion work of GR/GR in WC(0001)-Co/dGR is only 0.005 7 J·m^-2, and fracture toughness of dGR phase is 0.006 4 J·m^-2. The crack is most likely to be generated here. In order to verify results of interface bonding, the electronic structure and density of states of the three crystalline phases were analyzed. The results show that doping GR enhances charges distribution of atoms at the interface. W-Co has more charges transfer and attract, so bonding effect becomes enhanced. Compared with doped dGR, Co-C_(sGR) bond after sGR doping is enhanced, so Co-C_(sGR) bond is stronger than Co-C_(dGR) bond. The sGR doping improves interface bonding properties of hard phase WC and binder phase Co in WC(0001)-Co cemented carbide.

Key words： graphene WC(0001)-Co cemented carbide doping interface bonding properties

Published: 12 September 2020

CLC number:

TG135

Fund:This work was financially supported by the Natural Science Foundation of Shandong (ZR2013EEM016), Key Research and Development Plan of Shandong (2017GSF216004).

About author:: Junru Yang, received her Ph. D. degree from the College of Mechanical Engineering, Shandong University in December 2006 and obtained post-doctoral from the School of Materials Science and Engineering, Shandong University in March 2012, and entered the College of Mechanical and Electronic Engineering of Shandong University of Science and Technology in July 1995. Her research interests focus on the teaching and scientific research of mechanical manufacturing and automation. She has published more than 60 journal papers, more than 30 SCI/EI papers, 2 monographs and 2 authorized invention patents.

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	YANG Junru
	LI Shulei
	TANG Meihong
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	ZHANG Yuekan

Cite this article:

YANG Junru,LI Shulei,TANG Meihong, et al. Effect of Graphene Doping on the Interface Bonding Properties of Crystalline Phase of WC(0001)-Co Cemented Carbide[J]. Materials Reports, 2020, 34(18): 18109-18113.

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http://www.mater-rep.com/EN/10.11896/cldb.19090172 OR http://www.mater-rep.com/EN/Y2020/V34/I18/18109

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