Comparison of TiAlN, AlCrN, and AlCrN/TiAlN coatings for cutting-tool applications

作     者：T.Sampath Kumar S.Balasivanandha Prabu Geetha Manivasagam K.A.Padmanabhan 

作者机构：Department of Mechanical Engineering C.Abdul Hakeem College of Engineering and Technology Hakeem Nagar Melvisharam 632509 India Department of Mechanical Engineering College of Engineering Guindy Anna University Chennai 600025 India School of Mechanical and Building Sciences VIT University Vellore 632014 India School of Engineering Sciences & Technology University of Hyderabad Hyderabad 500046 India 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2014年第21卷第8期

页      面：796-805页

核心收录：

学科分类：08[工学] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：The authors wish to express their thanks to Oerlikon Balzers Coating India  Ltd. Irrungattukottai  NAL Bangalore and Sathyabama University for providing the facilities to perform these studies and to prepare the manuscript 

主　　题：cutting tools coatings physical vapor deposition characterization nanoindentation 

摘      要：Monolayer and bilayer coatings of TiAlN, AlCrN, and AlCrN/TiAlN were deposited onto tungsten carbide inserts using the plasma enhanced physical vapor deposition process. The microstructures of the coatings were characterized using scanning electron microscopy （SEM） and atomic force microscopy （AFM）. The SEM micrographs revealed that the AlrN and AlCrN/TiAlN coatings were uniform and highly dense and contained only a limited number of microvoids. The TiAIN coating was non-uniform and highly porous and contained more micro droplets. The hardness and scratch resistance of the specimens were measured using a nanoindentation tester and scratch tester, respectively. Different phases formed in the coatings were analyzed by X-ray diffraction （XRD）. The AlCrN/TiAlN coating exhibited a higher hardness （32.75 GPa）, a higher Young＇s modulus （561.97 GPa）, and superior scratch resistance （LcN = 46 N） compared to conventional coatings such as TiAlN, A1CrN, and TiN.