TY - GEN
T1 - WC-Co cemented carbides with ultrahigh fracture strength
AU - Song, Xiaoyan
AU - Liu, Xingwei
AU - Wang, Haibin
AU - Liu, Xuemei
AU - Wang, Xilong
PY - 2016
Y1 - 2016
N2 - WC-Co cemented carbides were prepared by sintering thein-situ synthesized composite powders with a constant Co content and VC or Cr3C2particles of different size scales. With an optimized carbon addition and doping of the microscale VC or nanoscale Cr3C2particles, the ultrahigh fracture strength with mean valuesabove 5000 MPa have been obtained in the prepared cemented carbide bulk materials. By detailed crystallographical analyses of the configuration and interactions of WC, Co, VC and Cr3C2 phases, the effects of the VC and Cr3C2particle size on the microstructure and mechanical properties of the cemented carbides were demonstrated. The mechanisms for the reinforcement of the fracture strength, concerning the binder distribution, characteristics of phase boundaries and dislocations motion in the WC grains were proposed, and the dominant factors for the ultrahigh fracture strength of the cemented carbides were discussed.
AB - WC-Co cemented carbides were prepared by sintering thein-situ synthesized composite powders with a constant Co content and VC or Cr3C2particles of different size scales. With an optimized carbon addition and doping of the microscale VC or nanoscale Cr3C2particles, the ultrahigh fracture strength with mean valuesabove 5000 MPa have been obtained in the prepared cemented carbide bulk materials. By detailed crystallographical analyses of the configuration and interactions of WC, Co, VC and Cr3C2 phases, the effects of the VC and Cr3C2particle size on the microstructure and mechanical properties of the cemented carbides were demonstrated. The mechanisms for the reinforcement of the fracture strength, concerning the binder distribution, characteristics of phase boundaries and dislocations motion in the WC grains were proposed, and the dominant factors for the ultrahigh fracture strength of the cemented carbides were discussed.
KW - Dislocation motion
KW - Fracture strength
KW - Grain growth inhibitor
KW - In-situ synthesized composite powder
KW - Interface characteristics
UR - http://www.scopus.com/inward/record.url?scp=85035328830&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85035328830
T3 - World PM 2016 Congress and Exhibition
BT - World PM 2016 Congress and Exhibition
PB - European Powder Metallurgy Association (EPMA)
T2 - World Powder Metallurgy 2016 Congress and Exhibition, World PM 2016
Y2 - 9 October 2016 through 13 October 2016
ER -