| 나노구조 CoTi-ZrO2 복합재료 합성과 급속소결 |
| 손인진 |
| 전북대학교 신소재공학부 수소연료전지 연구센터 |
| Synthesis and Rapid Sintering of Nanocrystalline CoTi-ZrO2 Composite |
| In-Jin Shon |
| Division of Advanced Materials Engineering, the Research Center of Hydrogen Fuel Cell, Chonbuk National University, Jeonbuk 54896, Republic of Korea |
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Received: 4 May 2016; Accepted: 23 May 2016. Published online: 5 November 2016. |
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| ABSTRACT |
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CoTi and ZrO2 nanopowders were mechanochemically synthesized from CoTiO3 and Zr powders according to the reaction (2CoTiO3 + 3Zr → 2CoTi + 3ZrO2). The milled powders were then consolidated by pulsed current-activated sintering within two minutes under an applied pressure of 80MPa. The average hardness and fracture toughness of the nanostructured 2CoTi-3ZrO2 composite sintered from high energy ball milled powder were 940 kg/mm2 and 6 MPa･m1/2, respectively. The mechanical properties of the composite were higher than those of monolithic CoTi or ZrO2, respectively. The microstructure and phases of the composite were investigated using FE-SEM and XRD. |
| Keywords:
sintering, composite materials, nanomaterials, mechanical properties, synthesis |
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