A Study on the Influence of Ceramic Coating on Characteristics of Friction and Abrasion of Aluminum Alloy(7075 T6) Used in Mechanical Casting

세라믹 코팅이 기계 주조용 알루미늄합금(7075 T6)의 마찰ㆍ마모특성에 미치는 영향에 관한 연구

  • Lyu, Sung-Ki ;
  • Jung, Kwang-Jo ;
  • Lu, Long
  • 류성기 ;
  • 정광조 ;
  • 로룡
  • Published : 2003.09.01

Abstract

This study deals with the influence of ceramic coating on characteristics of friction and abrasion of aluminum allot(7075 T6) used in mechanical casting. In this research, frictional wear characteristic of ceramic coating materials such as $A1_2O_3$, $Si_3N_4$, SiC was investigated using aluminum alloy(7075 T6) and stainless 403 cast iron under room temperature and normal air pressure. The coating layer was observed using SEM. The conclusions are as follows: 1) Friction coefficients of $A1_2O_3$, SiC and $Si_3N_4$ are obtained 0.63 0.56 and 0.54 respectively. 2) Abrasion resistance of stainless 403 cast iron with $Si_3N_4$ is the best among the ceramic coating materials. 3) Abrasion mechanism of aluminum alloy(7075 T6) coaled with ceramic material and stainless 403 cast iron is caused by brittle fracture. 4) Coating the ceramic material on the aluminum alloy(7075 T6) can effectively increase the antiwear, impact properties, and corrosion resistance.

Keywords

ceramic coating;frictional wear;wear mechanism

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