Structure and Mechanical Properties of CrTiAlN/TiAlN Composite Coatings Deposited by Multi-Arc Ion Plating

• Published in: Plasma science & technology Vol. 16; no. 10; pp. 969 - 973
• Main Author: 闫少健 田灿鑫 黄志宏 杨兵 付德君
• Format: Journal Article
• Language: English
• Published: 01.10.2014
• Subjects: Annealing; Cemented carbides; Coatings; Deposition; Friction; Ion plating; Microhardness; TiAlN涂层; Titanium aluminum nitride; 力学性能; 复合涂层; 多弧离子镀; 扫描电子显微镜; 显微硬度; 硬质合金; 结构
• ISSN: 1009-0630
• DOI: 10.1088/1009-0630/16/10/12

CrTiAlN/TiAlN composite coatings were deposited on cemented carbide by using a home-made industrial scale multi-arc ion plating system. The samples were studied by X-ray diffraction, scanning electron microscopy （SEM）, microhardness and ball-on-disk testing. The properties of the CrTiAlN/TiAlN coatings were significantly influenced by the microstructure and the deposition time ratio of TiAlN over CrTiAlN layers. With the increase of deposition time ratio, the microhardness of CrTiAlN/TiAlN increased from 28.6 GPa to 37.5 GPa, much higher than that of CrTiAlN coatings. The friction coefficients of the CrTiAlN/TiAlN coatings were higher than those of CrTiAlN coatings against a cemented carbide ball. The microhardness of the CrTiAlN/TiAlN coatings was changed after annealing at 800 ℃, and the friction coefficients of the annealed coatings were increased against the cemented carbide ball.