Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Wear Characteristics of Lubricant with Nano-diamond Particles on Al-6061 Aluminum Alloy

나노 다이아몬드 입자를 첨가한 엔진 오일의 알루미늄 6061 합금에 대한 마모 특성

  • Hwang, Sung-Wan (Department of Automotive Engineering, Busan Campus of Korea Polytechnics)
  • 황성완 (한국폴리텍대학 부산캠퍼스 자동차과)
  • Received : 2021.09.23
  • Accepted : 2021.10.19
  • Published : 2021.12.31
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Abstract

Pin-to-disc wear testing experiments were conducted to investigate the wear characteristics of commercial oil (5W-40) with nano-diamond particles. The upper specimen was a SUJ-2 high-carbon chromium steel ball with a diameter of 4 mm, and the lower specimen was made of the Al-6061 alloy. The applied load was 5 N, and the sliding speed was 0.25 m/s. The wear tests were conducted at a sliding distance of 500 m. The friction coefficients and wear rates of the Al-6061 specimens were tested using commercial oil with different nano-diamond concentrations ranging from 0 to 0.02 wt.%. The addition of nano-diamond particles to commercial oil reduced both the wear rate and coefficient of friction of the Al-6061 alloy. The use of nano-diamond particles as a solid additive in oil lubricants was found to improve the tribological behavior of the Al-6061 alloy. For the Al-6061 alloy, the optimal concentration was found to be 0.005 wt.% in view of the friction coefficient and wear rate. Further investigation is needed to determine the optimal concentration of nano-diamond particles for various loadings, sliding speeds, oil temperatures, and sliding distances.

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References

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