|
Vol.49, No.1, 40 ~ 46, 2011
|
| Title |
| Fabrication and Mechanical Properties of ultra fine WC-6wt.%Co by Spark Plasma Sintering Process |
| 박국현 Hyun Kuk Park , 이승민 Seung Min Lee , 윤희준 Hee Jun Youn , 방기상 Ki Sang Bang , 오익현 Ik Hyun Oh |
|
|
|
| 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℃. |
|
|
| Key Words |
| spark plasma sintering process, WC-Co, hardness, fracture toughness, rapid sintering |
|
|
 |
|
