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논문 기본 정보

자료유형
학술저널
저자정보
Ur Rehman, Zeeshan (School of Materials Science and Engineering, Changwon National University) Lee, Dong-Gun (School of Materials Science and Engineering, Changwon National University) Koo, Bon Heun (School of Materials Science and Engineering, Changwon National University)
저널정보
한국재료학회 한국재료학회지 한국재료학회지 제25권 제10호
발행연도
2015.1
수록면
503 - 508 (6page)

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In this work, ceramic coatings were prepared on Al7075 aluminum alloy using microarc oxidation (MAO) process in a silicate-fluoride based electrolyte solution. The effect of $OH^-$ concentration, by adding NaOH to the solution on the microstructural and mechanical properties of the coating was investigated. Surface morphology and cross sectional view of the coating was analyzed using SEM while XRD was used to examine the phase compositions of the coatings. From XRD ${\alpha}-Al_2O_3$ phase was found to be increased by adding NaOH to the electrolyte. Thereby, the hardness and the wear properties of the MAO coatings were found to be superior to those of the coatings prepared without NaOH addition or with amount maximum than 2 g/l NaOH. Moreover, the morphology of the coatings was transformed form nodule-based cluster to crater based structure with the addition of NaOH to the MAO electrolyte solution.

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