Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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The effect of mechanical properties of carbon-based thin film on plasma nitrided injection mold steel

플라즈마 질화처리한 사출금형소재의 비정질 탄소계 박막 증착에 따른 기계적 특성 향상 효과

  • Hye-Min Kim (Department of Materials Chemistry, Shinshu University) ;
  • Dae-Wook Kim (Advanced Manufacturing Process R&D Group, Ulsan Division, Korea Institute of Industrial Technology)
  • Received : 2023.09.05
  • Accepted : 2023.10.04
  • Published : 2023.10.31
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Abstract

The carbon-based films have various properties, which have been widely applied in industrial application. However, it has critical drawback for poor adhesion between films and metal substrate. In the present work, we have deposited carbon-based films on injection mold steel by plasma assisted chemical vapor deposition (PACVD). In order to improve adhesion, prior to film deposition, the substrate was nitriding-treated using PACVD. And its effect on the adhesion was investigated. Due to the pre-nitriding, the amorphous carbon nitride (a-CN:H) films presented 10 times higher adhesion (34.9 N) than that of un-nitirided. In addition, a friction coefficient was decreased from 0.29 to 0.15 for the amorphous carbon (a-C:H) due to improved adhesion. The obtained results demonstrated that pre-nitriding considerably improved the adhesion, and the relationship among adhesion, hardness, and surface roughness was discussed in detail.

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References

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