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Korean Journal of Metals and Materials > Volume 54(8); 2016 > Article
Korean Journal of Metals and Materials 2016;54(8): 566-572. doi: https://doi.org/10.3365/KJMM.2016.54.8.566
펄스전류 활성 소결에 의한 나노구조 TiC-TiAl 제조 및 기계적 성질
곽봉원1, 김병수2, 윤진국3, 홍경태3, 손인진1,*
1전북대학교 신소재공학부 신소재개발연구센터
2한국지질자원연구원
3한국과학기술연구원
Fabrication and Mechanical Properties of Nanostructured TiC-TiAl by the Pulsed Current Activated Sintering
Bong-Won Kwak1, Byung-Su Kim2, Jin-Kook Yoon3, Kyung-Tae Hong3, In-Jin Shon1,*
1Division of Advanced Materials Engineering and the Research Center of Advanced Materials Development, Engineering College, Chonbuk National University, Chonbuk 54896, Republic of Korea
2Minerals Resources Research Division, Korea Institute of Geoscience and Mineral Resources, Daejeon 34132, Republic of Korea
3Materials Architecturing Research Center, Korea Institute of Science and Technology, PO Box 131, Cheongryang, Seoul 02792, Republic of Korea
Correspondence  In-Jin Shon ,Tel: +82-63-270-2381, Email: ijshon@chonbuk.ac.kr
Received: 14 December 2015;  Accepted: 20 March 2016.  Published online: 5 August 2016.
ABSTRACT
TiC-Co or TiC-Ni hard materials have been used for cutting tools. However, the high cost and the low hardness of Ni or Co, and the low corrosion resistance of the TiC-Ni and TiC-Co cermets have generated interest in recent years in using them as alternative binder phases. In this study, TiAl was used as a novel binder and consolidated by the pulsed current activated sintering(PCAS) method. Nanopowders of TiC and TiAl were fabricated using high energy ball milling. Highly dense TiC-TiAl hard materials with a relative density of up to 99.5% were sintered within three min by PCAS. Not only the hardness but also the fracture toughness of the TiC-10 vol%TiAl were better than those of TiC-10 vol%Ni or TiC-10 vol%Co.
Keywords: composites, nanomaterials, sintering, hardness, fracture toughness
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