| Title |
Fabrication and Mechanical Properties of WC-Mo2C-Co Hard Materials by the Pulsed Current Activated Sintering Method |
| Authors |
윤희준(Hee Jun Youn); 방한서(Han Sur Bang); 방희선(Hee Seon Bang); 오익현(Ik Hyun Oh); 박현국(Hyun Kuk Park) |
| DOI |
https://doi.org/10.3365/KJMM.2012.50.12.921 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
pulsed current activated sintering method; WC-Mo2C-Co; hard material; mechanical property; rapid sintering |
| Abstract |
The pulsed current activated sintering method (PCAS) is a new rapid sintering method that was developed recently for fabricating ceramics and composites. This method combines a high temperature for a short time with pressure application. In this work, PCAS was used to fabricate WC-5wt%Mo2C-5wt% Co hard material using WC, Mo2C, and Co. The WC-Mo2C-Co was almost completely dense with a relative density of up to 100% after the simultaneous application of a pressure of 60 MPa and electric current for 11 min without grain growth. The average grain size of WC that was produced through PCAS was about 0.5-0.6 ㎛. The vickers hardness and fracture toughness of the WC-5wt%Mo2C-5wt%Co hard materials were about 2453.5 kg/mm2 and 7.9 MPa · m1/2, respectively, for 60 MPa at 11200℃. |