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플라즈마 화학증착법에 의한 TiN 박막 밀착력에 Ti 중간층이 미치는 영향
김선효,우치구,이상로 대한금속재료학회(대한금속학회) 1992 대한금속·재료학회지 Vol.30 No.12
Adhesion is one of the most important properties of coated TiN layer for the wear resistant application. This study is focused on improving the adhesion of a TiN film grown by PECVD method. The adhesion was significantly affected by the microstructure of a Ti interlayer. In order to investigate a relationship between the adhesion and the microstructure of a Ti interlayer, the analyses of XRD, EDS and SEM were performed. As a pressure was decreased or the negative bias voltage was applied to the substrate while sputter-depositing a Ti interlayer, the degree of preferred orientation increased. The Ti film exhibited a preferred growth orientation of(002) which matches with TiN (111) plane coherently. It was found that the adhesion of a TiN layer decreased with increasing the degree of preferred orientation of a Ti interlayer. This tendency was explained with the phenomena of stress accumulation and relaxation at the interfaces. The adhesioin of the TiN film grown by PECVD was improved up to 45N when the crystallization and the preferred orientation of a Ti interlayer were suppressed by depositing at a relatively high pressure.
박주석도금강판의 용접성과 내식성에 미치는 니켈 극박도금의 영향
문원식,박광호,차승수,우치구 대한금속재료학회(대한금속학회) 1993 대한금속·재료학회지 Vol.31 No.11
The effects of Ni flash coating on weldability and corrosion resistance of lightly tin coated steel(LTS) have been studied. When Ni layer was coated the prefered orientation of Sn layer was (200) plane. As Sn alloy was formed through reflow or/and stoving process, the structure of Sn alloy with Ni layer was denser than that without Ni layer. The consumption of Sn to Sn alloy was retained when Ni was coated, because the diffusion of Sn was inhibited by dense Fe-Ni-Sn alloy. After reflow and baking process the pure metalic tin remained was enough to have good weldability of LTS. Accelerated salt immersion test, undercutting corrosion test and retort test were performed and we found that Ni-LTS (chromic acid treated) had better lacquer adhesion and better corrosion resistance than tinplate(#25).