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http://dx.doi.org/10.9725/kstle.2017.33.6.296

Effects of Ball Milling for Elemental Powders on Ni-Al based Intermetallics Coating on Mild Steel through Induction Heating Process  

Lee, Han-Young (Dept. Advanced Materials Eng., Keimyung University)
Park, Won-Kyu (Dept. of Materials Engineering, Graduated School, Keimyung University)
Publication Information
Tribology and Lubricants / v.33, no.6, 2017 , pp. 296-302 More about this Journal
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.
Keywords
ball-milling; combustion synthesis; induction heating; intermetallics; reactivity;
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Times Cited By KSCI : 2  (Citation Analysis)
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