Journal of Surface Science and Engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Microstructure, Crystal Structure and Mechanical Properties of VN Coatings Using Asymmetric Bipolar Pulsed dc Sputtering

비대칭 바이폴라 펄스 스퍼터법으로 증착된 VN 코팅막의 미세구조, 결정구조 및 기계적 특성에 관한 연구

  • Chun, Sung-Yong (Department of Advanced Materials Science and Engineering, Mokpo National University) ;
  • Jeong, Pyeong-Geun (Department of Advanced Materials Science and Engineering, Mokpo National University)
  • 전성용 (목포대학교 신소재공학과) ;
  • 정평근 (목포대학교 신소재공학과)
  • Received : 2016.09.01
  • Accepted : 2016.10.18
  • Published : 2016.10.31
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Abstract

Nanocrystalline vanadium nitride (VN) coatings were deposited using asymmetric bipolar pulsed dc sputtering to further understand the influence of the pulsed plasmas on the crystal structure, microstructure and mechanical properties. Properties of VN coatings were investigated with FE-SEM, XRD and nanoindentation. The results show that, with the increasing pulse frequency and decreasing duty cycle, the coating morphology changed from a porous columnar to a dense structure, with finer grains. Asymmetric bipolar pulsed dc sputtered VN coatings showed higher hardness, elastic modulus and residual compressive stress than dc sputtered VN coatings. The results suggest that asymmetric bipolar pulsed dc sputtering technique is very beneficial for the reactive sputtering deposition of VN coatings.

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References

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