| Title |
Rapid Sintering of Nanocrystalline (W,Ti)C-Graphene Composites |
| Authors |
김성은(Seong-eun Kim); 손인진(In-jin Shon) |
| DOI |
https://doi.org/10.3365/KJMM.2018.56.12.854 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
sintering; mechanical properties; composite; nanomaterial |
| Abstract |
In spite of the many attractive properties of (W,Ti)C, its low fracture toughness limits its wide application. To improve the fracture toughness generally a second phase is added to fabricate a nanostructured composite. In this regard, graphene was considered as the reinforcing agent of (W,Ti)C. (W,Ti)C-graphene composites that were sintered within 2 min using pulsed current activated heating under a pressure of 80 MPa. The rapid consolidation method allowed retention of the nano-scale microstructure by blocking the grain growth. The effect of graphene on the hardness and microstructure of the (W,Ti)C-graphene composite was studied using a Vickers hardness tester and FE-SEM. The grain size of (W,Ti)C was reduced remarkably by the addition of graphene. Furthermore, the hardness decreased and the fracture toughness improved with the addition of graphene.(Received August 13, 2018; Accepted November 5, 2018) |