| Title |
Fabrication and Mechanical Properties of ultra fine WC-6wt.%Co by Spark Plasma Sintering Process |
| Authors |
박국현(Hyun Kuk Park); 이승민(Seung Min Lee); 윤희준(Hee Jun Youn); 방기상(Ki Sang Bang); 오익현(Ik Hyun Oh) |
| DOI |
https://doi.org/10.3365/KJMM.2011.49.1.040 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
spark plasma sintering process; WC-Co; hardness; fracture toughness; rapid sintering |
| Abstract |
Using the spark plasma sintering process (SPS process), the WC-6wt.%Co hard materials were densified using an ultra fine WC-Co powder. The WC-Co was almost completely dense with a relative density of up to 100% after the simultaneous application of a pressure of 60 MPa and the DC pulse current for 3 min without any significant change in the grain size. The average grain size of WC that was produced through this experiment was about 0.2~0.8 μm. The hardness and fracture toughness were about 1816 kg/mm2 and 15.1 MPa·m1/2, respectively, for 60 MPa at 1200℃. |