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WC-TiN 초고경도 복합재료 박막 합성 및 기계적 특성에 관한 연구
한전건,명현식,윤주선 대한금속재료학회(대한금속학회) 2000 대한금속·재료학회지 Vol.38 No.4
Composite films have been one of approaches for new hard coating development and provided properties which are unachievable in uniform materials. Structurally, composite films tended to have dense and fine granular structure because column propagation was periodically interrupted by the nucleation of another phase. In this study, WC-TiN composite films were deposited on cemented carbide substrates by cathodic arc ion plating process. The chemical compositions and crystal structures were evaluated by energy dispersive spectroscopy(EDS) and X-ray diffractometry(XRD), respectively. Film thickness and fracture morphologies were investigated by using scanning electron microscopy(SEM). The mechanical properties such as film adhension and microhardness were evaluated by scratch test, microknoop hardness test and nano indentation hardness test. The microhardness of the WC-TiN composite film on cemented carbide was measured to be 4000(㎏/㎟) which is 1.5 times higher than that of the WC and TiN single layer. The critical load(Lc) of WC-Ti/WC-TiN multi-layer film was measured to be 48.5N in scratch test.
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