Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Wear Resistance of c-BN Surface Modified 316L Austenitic Stainless Steel by R.F. Sputtering

R.F. sputtering 방법에 의해 c-BN 표면처리된 316L 오스테나이트계 스테인리스 강의 내마모특성 향상

  • Lee, Kwang-Min (Department of Materials Science & Engineering, Research Institute for Functional Surface Engineering, Chonnam National University) ;
  • Jeong, Se-Hoon (Department of Materials Science & Engineering, Research Institute for Functional Surface Engineering, Chonnam National University) ;
  • Park, Sung-Tae (Air Conditioning Solution Business Team, Samsung Electronics Co., LTD)
  • 이광민 (전남대학교 신소재공학부, 기능성 표면공학연구소) ;
  • 정세훈 (전남대학교 신소재공학부, 기능성 표면공학연구소) ;
  • 박성태 (삼성전자(주) 공조솔루션사업팀)
  • Published : 2010.04.27
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Abstract

Cubic boron nitride (c-BN) is a promising material for use in many potential applications because of its outstanding physical properties such as high thermal stability, high abrasive wear resistance, and super hardness. Even though 316L austenitic stainless steel (STS) has poor wear resistance causing it to be toxic in the body due to wear and material chips, 316L STS has been used for implant biomaterials in orthopedics due to its good corrosion resistance and mechanical properties. Therefore, in the present study, c-BN films with a $B_4C$ layer were applied to a 316L STS specimen in order to improve its wear resistance. The deposition of the c-BN films was performed using an r.f. (13.56 MHz) magnetron sputtering system with a $B_4C$ target. The coating layers were characterized using XPS and SEM, and the mechanical properties were investigated using a nanoindenter. The friction coefficient of the c-BN coated 316L STS steel was obtained using a pin-on-disk according to the ASTM G163-99. The thickness of the obtained c-BN and $B_4C$ were about 220 nm and 630 nm, respectively. The high resolution XPS spectra analysis of B1s and N1s revealed that the c-BN film was mainly composed of $sp^3$ BN bonds. The hardness and elastic modulus of the c-BN measured by the nanoindenter were 46.8 GPa and 345.7 GPa, respectively. The friction coefficient of the c-BN coated 316L STS was decreased from 3.5 to 1.6. The wear property of the c-BN coated 316L STS was enhanced by a factor of two.

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References

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