Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Wear Resistance Characteristics of Thermal Sprayed AlSiMg/SiC Composite Coatings on Aluminum Engine Cylinder Bores

Aluminum Engine Cylinder Bore 적용 AlSiMg/SiC 복합 용사피막의 내마모 특성

  • 양병모 (경북대학교 공과대학 금속공학과) ;
  • 변응선 (한국기계연구원 표면기술연구부) ;
  • 박경채 (경북대학교 공과대학 금속공학과)
  • Published : 1999.12.01
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Abstract

The advantages of Thermal sprayed coatings as a replacement for cast iron liners are reduced weight, better heat transfer and reduced cost. One of the most important performance attributes of a cylinder bore coating is its wear resistance, since it must survive the abrasive sliding of both the piston rings and the piston skirt. In this study, composite powders were prepared by ball milling of Al-13Si-3Mg(wt%) alloy with SiC particles. The concentrations of SiC were 40 and 60wt%. The composite powders were sprayed using Metco-9MB plasma torch. Plasma sprayed coatings were heat-treated at 500℃ for 3 hours. The wear resistances of the plasma sprayed coatings were found to improve with heat treatment and superior to the commercially available G.C.I.(gray cast iron). AlSiMg-40SiC heat-treated coatings showed the best wear resistance in this study.

Keywords

References

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