Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Effects of Ball Milling for Elemental Powders on Ni-Al based Intermetallics Coating on Mild Steel through Induction Heating Process

Ni-Al계 금속간화합물의 고주파 연소합성코팅에 미치는 볼 밀링의 영향

  • Lee, Han-Young (Dept. Advanced Materials Eng., Keimyung University) ;
  • Park, Won-Kyu (Dept. of Materials Engineering, Graduated School, Keimyung University)
  • 이한영 (계명대학교 신소재공학과) ;
  • 박원규 (계명대학교 대학원 재료공학과)
  • Received : 2017.10.21
  • Accepted : 2017.11.29
  • Published : 2017.12.31
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Abstract

Ball milling of elemental powders in advance and using an induction heating system for intermetallic coatings are known to enhance the reactivity of combustion synthesis. In this work, the effects of simultaneously applying these two incentive methods on the properties of intermetallic coatings are studied. Ni-Al powder compacts ball-milled with three different ball-to-powder weight ratio mixtures are synthesized and coated on mild steel by combustion synthesis in an induction heating system. Consequently, similar to an electrical heating system, the positive effects of ball milling on the combustion synthesis are confirmed in the induction heating system. The enhancement in synthetic reactivity achieved by applying the two incentive methods at the same time is greater than that by applying each incentive method separately. In particular, the enhancement is remarkable at low reaction temperature. However, there are limitations to improving the reactivity by simultaneously applying the two incentive methods to the combustion synthesis, unlike the reaction temperature. The microstructure and hardness of the coating layer are both influenced by the ball-charging ratio employed in the ball-milling process.

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References

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