Microstructures, mechanical properties, and tribological behaviors of Cr–Al–N, Cr–Si–N, and Cr–Al–Si–N coatings by a hybrid coating system

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• 作者：In-Wook Park ; Dong Shik Kang ; John J. Moore ; Sik Chol Kwon ; Jong Joo Rha ; Kwang Ho Kim
• 关键词：Cr&#x2013 ; Al&#x2013 ; N ; Cr&#x2013 ; Si&#x2013 ; N ; Cr&#x2013 ; Al&#x2013 ; Si&#x2013 ; N ; Mechanical properties ; Tribological behaviors
• 刊名：Surface and Coatings Technology
• 出版年：2007
• 期刊代码：106_02578972
• 类别：ms
• 出版时间：26 February 2007
• 卷：201
• 期：9-11
• 页码：5223-5227
• 文件大小：944 K

摘要

Cr–Al–N, Cr–Si–N, Cr–Al–Si–N coatings were successfully deposited on WC–Co substrates by a hybrid coating system combining an arc ion plating technique using Cr target, and a magnetron sputtering method using Al and Si targets under N₂/Ar atmosphere. XRD, HRTEM, and XPS analyses revealed that the synthesized Cr–Al–N coatings consisted of solid-solution (Cr,Al)N crystallites, and the Cr–Si–N and Cr–Al–Si–N coatings with Si content of 9 at.%were fine composites consisting of (Cr,Si)N and (Cr,Al,Si)N crystallites, respectively, embedded in an amorphous Si₃N₄/SiO₂ matrix. The hardness values of the Cr–Si–N ( 35 GPa) and the Cr–Al–Si–N ( 55 GPa) coatings were significantly increased compared with those of CrN ( 23 GPa) and Cr–Al–N ( 25 GPa) coatings. Besides, the average friction coefficients of the Cr–Si–N ( 0.30) and the Cr–Al–Si–N ( 0.57) coatings with Si content of about 9 at.%were largely decreased compared with those of CrN ( 0.50) and Cr–Al–N ( 0.84) coatings. A comparative study on microstructural characteristics among Cr–Al–N, Cr–Si–N, and Cr–Al–Si–N coatings is reported in this paper.