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Korean Journal of Metals and Materials > Volume 54(11); 2016 > Article
Korean Journal of Metals and Materials 2016;54(11): 826-830. doi: https://doi.org/10.3365/KJMM.2016.54.11.826
나노구조 CoTi-ZrO2 복합재료 합성과 급속소결
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
Correspondence  In-Jin Shon ,Tel: +82-63-270-2381, Email: ijshon@chonbuk.ac.kr
Received: 4 May 2016;  Accepted: 23 May 2016.  Published online: 5 November 2016.
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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