Influence of Al Content on the Microstructure and Properties of the Cr Al N Coatings Deposited by Arc Ion Plating
来源期刊:Acta Metallurgica Sinica2017年第12期
论文作者:Qi-Xiang Fan Jiao-Jiao Zhang Zheng-Huan Wu Yan-Mei Liu Tao Zhang Bing Yan Tie-Gang Wang
文章页码:1221 - 1230
摘 要:Four Cr Al N coatings with various Al content were prepared by arc ion plating technology under different target currents.The effect of the Al content on the microstructure,chemical compositions,element chemical bonding states and mechanical properties of the Cr Al N coatings was analyzed.X-ray diffraction results show that the primary phase of the Cr Al N coating is fcc-(Al,Cr)N when the Al content is about 44.02 at.%.However,when the Al content increases to about 53.34 at.%,hcp-Al N phase emerges in the coating.And the hcp-Al N phase becomes the main phase in the Cr Al N coating with Al content of about 69.55 at.%.Cross-sectional images show that all the four coatings possess dense structures and the deposition rate of Al atom is higher than that of Cr atom.The hardness of the Cr Al N coating with Al content about 44.02 at.%is the largest(3149.72 HV)due to the solid solution hardening effect of the Al element.When the hcp-Al N phase is generated in the Cr Al N coating,the hardness declines.The tribological experiment shows that the wear resistance of the Cr Al N coating decreases gradually with increasing Al content when sliding against 100Cr6 steel ball.
Qi-Xiang Fan1,Jiao-Jiao Zhang1,Zheng-Huan Wu1,Yan-Mei Liu1,Tao Zhang2,Bing Yan1,Tie-Gang Wang1
1. Tianjin Key Laboratory of High Speed Cutting and Precision Machining,Tianjin University of Technology and Education2. Division of State-Owned Assets Management,Tianjin University of Technology and Education
摘 要:Four Cr Al N coatings with various Al content were prepared by arc ion plating technology under different target currents.The effect of the Al content on the microstructure,chemical compositions,element chemical bonding states and mechanical properties of the Cr Al N coatings was analyzed.X-ray diffraction results show that the primary phase of the Cr Al N coating is fcc-(Al,Cr)N when the Al content is about 44.02 at.%.However,when the Al content increases to about 53.34 at.%,hcp-Al N phase emerges in the coating.And the hcp-Al N phase becomes the main phase in the Cr Al N coating with Al content of about 69.55 at.%.Cross-sectional images show that all the four coatings possess dense structures and the deposition rate of Al atom is higher than that of Cr atom.The hardness of the Cr Al N coating with Al content about 44.02 at.%is the largest(3149.72 HV)due to the solid solution hardening effect of the Al element.When the hcp-Al N phase is generated in the Cr Al N coating,the hardness declines.The tribological experiment shows that the wear resistance of the Cr Al N coating decreases gradually with increasing Al content when sliding against 100Cr6 steel ball.
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