| Ni/Ti 금속침투에 의한 반응결합소결 TiC계 복합체의 미세구조 및 기계적 특성 |
| 한인섭, 우상국, 김홍수, 양준환1, 정윤중2 |
한국에너지기술연구소 에너지재료연구팀
1한국에너지기술연구소 에너지재료연구
2명지대학교 공과대학 무기재료공학과 |
| Microstructure and Mechanical Properties of Reaction-Bonded Sintering TiC-Based Composite Prepared by Ni-Ti Metal Infiltration |
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| ABSTRACT |
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The TiC-(Ni/Ti) composites were prepared by reaction bonding between TiC preforms and the melted mixture of Ni/Ti metal the atomic ratio of which were the ranges of 0.3 to 3. And their microstructures phase composi-tions and mechanical properties were investigated. During reaction bonding Ni/Ti metal mixture had a good wettability an permeability with TiC preforms and pore-free and fully dense sintered bodies were fabricated. TiC particle shape changed from spherical to angular platelet-like and grain size was grown with Ni/Ti atomic ratio increasing from 0.3 to 1. whereas grain growth of TiC particle was restrained and its shape changed gain from angular platelet-like to spherical when Ni/Ti atomic ratio was more than 2. Maximum bending strength and fracture toughness were obtained at the Ni/Ti atomic ratio being 1 their values were 582 MPa and 11.1 MPa.m1/2 respectively. |
| Key words:
Reaction -bonded sintering TiC-Ni/Ti composites, Melt infiltration, Liquid phase sintering |
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