| Title |
Fabrication and Mechanical Properties of a Nanostructured TiN-AlN Composite by Pulsed Current Activated Sintering |
| Authors |
김원백(Won Baek Kim); 서창열(Chang Yul Suh); 노기민(Ki Min Roh); 임재원(Jae Won Lim); 심현보(Hyun Bo Shim); 박현국(Hyun Kuk Park); 손인진(In Jin Shon) |
| DOI |
https://doi.org/10.3365/KJMM.2012.50.11.861 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Composites; nanostructured materials; sintering; mechanical properties |
| Abstract |
A dense nanostructured TiN-AlN composite was prepared from high-energy ball milled TiN-AlN mixture powders by pulsed current activated sintering (PCAS). A highly dense TiN-AlN bulk composite was obtained within 2 minutes at 1500℃ with the simultaneous application of 80 MPa pressure and pulsed current. The fine crystalline structure of the TiN-AlN mixture, which was obtained by high-energy milling, was effectively maintained during PCAS and resulted in the enhancement of the mechanical properties. The micro hardness and fracture toughness of TiN-AlN composite were 1780 kg/mm2 and 5 MPa.m1/2, respectively. The mechanical properties were higher than monolithic AlN or TiN. |