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Study on Preparation Technique of CrAlTiN Coatings on Magnesium Alloy by Magnetron Sputtering

CHEN Di-chun,JIANG Bai-ling,WU Wen-wen,LI Hong-tao(School of Materials Science and Engineering,Xi'an University of Technology,Xi'an 710048,China)  
Using closed field unbalanced magnetron sputtering Ion plating,the CrAlTiN coatings were deposited on the magnesium alloy through changing bias.The thickness, hardness,adhesion and wear-resistance of coatings were tested,the morphologies and phase composition of coatings were investigated by SEM and XRD.The results showed that the CrAlTiN coatings can be deposited on the magnesium alloy by changing the bias.The hardness and compactness of coatings are improved with the increase of bias.The coatings have the best adhesion and wear-resistance while bias at 35V.The microstructure of CrAlTiN corresponds to that of fcc CrN.
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