Al 소재의 방열특성 향상을 위한 미세조직 제어 연구
Control of Nano-Scaled Surface Microstructure of Al Sample for Improving Heat Release Ability
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In this study, the control of microstructure for increasing surface roughness of Al with an electro-chemicalreaction and a post treatment is systematically investigated. The Al specimen is electro-chemically treated in an electrolyte. In condition of the post treatment at 100oC for 10 min, a change of the surface microstructure occur at 50V (5min), and a oxidized layer is at 400V, to which lead a decreasing surface roughness. The minimum temperature of thepost treatment for a change of microstructure is 80oC. Moreover, in the condition of 300V (5 min), the electro-chemicalreaction is followed by the post treatment at 100oC, the critical enduring time for the change of microstructure is 3 min. The longer post treatment time leads to the rougher surface. The treated Al specimen demonstrate better heat releaseability owing to the higher surface roughness than the non-treated Al.
Abstract
In this study, the control of microstructure for increasing surface roughness of Al with an electro-chemicalreaction and a post treatment is systematically investigated. The Al specimen is electro-chemically treated in an electrolyte. In condition of the post treatment at 100oC for 10 min, a change of the surface microstructure occur at 50V (5min), and a oxidized layer is at 400V, to which lead a decreasing surface roughness. The minimum temperature of thepost treatment for a change of microstructure is 80oC. Moreover, in the condition of 300V (5 min), the electro-chemicalreaction is followed by the post treatment at 100oC, the critical enduring time for the change of microstructure is 3 min. The longer post treatment time leads to the rougher surface. The treated Al specimen demonstrate better heat releaseability owing to the higher surface roughness than the non-treated Al.
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