고주파유도 가열에 의한 나노구조 WC와 WC-TiAl 급속소결 및 기계적 성질

• Published in: 대한금속·재료학회지, 54(3) Vol. 54; no. 3; pp. 180 - 186
• Main Authors: 곽봉원, Bong-won Kwak, 오승진, Seung-jin Oh, 김병수, Byung-su Kim, 윤진국, Jin-kook Yoon, 손인진, In-jin Shon
• Format: Journal Article
• Language: Korean
• Published: 대한금속재료학회 05.03.2016; 대한금속·재료학회
• Subjects: composites; mechanical properties; nanostructured materials; sintering; 재료공학
• ISSN: 1738-8228; 2288-8241
• DOI: 10.3365/KJMM.2016.54.3.180

In the case of cemented WC, Ni or Co is added as a binder for the formation of composite structures. However, the high cost and the low hardness of Ni or Co, and the low corrosion resistance of the WC-Ni and WC-Co cermets have generated interest in alternative binder phases recently. In this study, TiAl was used as a novel binder and consolidated by the high frequency induction heated sintering (HFIHS) method. Nanopowders of WC and TiAl were made by high energy ball milling. Highly dense WC and WC-10 vol% TiAl with a relative density of up to 99 % were obtained within one min by HFIHS under a pressure of 80 MPa. The addition of TiAl to WC enhanced the toughness without great decrease of hardness due to the crack deflection and nanostructured phase.