한국표면공학회지 (Journal of the Korean institute of surface engineering)

  • 제54권5호
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  • Pages.230-237
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  • 2021
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  • 1225-8024(pISSN)
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  • 2288-8403(eISSN)
한국표면공학회 (The Korean Institute of Surface Engineering)
권호 표지
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초고경도 Ti-Al-Si-N 나노복합체 코팅막의 미세구조 및 트라이볼로지 거동에 관한 연구

A Study on Microstructure and Tribological Behavior of Superhard Ti-Al-Si-N Nanocomposite Coatings

  • 허성보 (한국생산기술연구원 첨단하이브리드생산기술센터) ;
  • 김왕렬 (한국생산기술연구원 첨단하이브리드생산기술센터)
  • Heo, Sung-Bo (Advanced Hybrid Production Technology Center, Korea Institute of Industrial Technology) ;
  • Kim, Wang Ryeol (Advanced Hybrid Production Technology Center, Korea Institute of Industrial Technology)
  • 투고 : 2021.10.05
  • 심사 : 2021.10.30
  • 발행 : 2021.10.31
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초록

In this study, the influence of silicon contents on the microstructure, mechanical and tribological properties of Ti-Al-Si-N coatings were systematically investigated for application of cutting tools. The composition of the Ti-Al-Si-N coatings were controlled by different combinations of TiAl2 and Ti4Si composite target powers using an arc ion plating technique in a reactive gas mixture of high purity Ar and N2 during depositions. Ti-Al-Si-N films were nanocomposite consisting of nanosized (Ti,Al,Si)N crystallites embedded in an amorphous Si3N4/SiO2 matrix. The instrumental analyses revealed that the synthesized Ti-Al-Si-N film with Si content of 5.63 at.% was a nanocomposites consisting of nano-sized crystallites (5-7 nm in dia.) and a three dimensional thin layer of amorphous Si3N4 phase. The hardness of the Ti-Al-Si-N coatings also exhibited the maximum hardness value of about 47 GPa at a silicon content of ~5.63 at.% due to the microstructural change to a nanocomposite as well as the solid-solution hardening. The coating has a low friction coefficient of 0.55 at room temperature against an Inconel alloy ball. These excellent mechanical and tribological properties of the Ti-Al-Si-N coatings could help to improve the performance of machining and cutting tool applications.

키워드

과제정보

본 논문은 한국생산기술연구원 기관주요사업 "해수 담수/수전해를 이용한 그린소수 생산시스템 및 핵심부품 개발(KITECH JA-21-0007)"의 지원으로 수행한 연구입니다.

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