Enhanced Corrosion and Wear Resistances of Zr-based Alloy Induced by Amorphous/Nanocrystalline Coating  

作　　者：CAI Baoxian YANG Liang 蔡保贤;杨亮(College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics)

机构地区：[1]College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2019年第4期791-797,共7页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(Nos.51471088 and U1332112);the Fundamental Research Funds for the Central Universities(No.NE2015004);the Project of the Priority Academic Program Development(PAPD)of Jiangsu Higher Education Institutions

摘　　要：To improve corrosion and wear resistances of the Zirconium(Zr) based alloys which are widely applied in nuclear reactors and chemical corrosion-resistant equipment, a new surface modification scheme was designed to deposit a Zr75Cu25 coating on Zr substrate by using magnetron sputtering technique. The microstructure and the phase composition were characterized by scanning electron microscope, transmission electron microscope, and X-ray diffraction measurements. The tribological properties and the corrosion resistance were investigated by performing reciprocating tribo-tester and electrochemical tests, respectively.It is found that the Zr75Cu25 coating is made up of a mixture of amorphous and a-(Zr) nanocrystalline phases.The nanocrystalline particles with a size of 5-10 nm are homogenously dispersed in the amorphous matrix.The Zr75Cu25 coating shows excellent tribological properties, due to the dispersion strengthen caused by the homogeneous distribution of a-(Zr) nano-size particles among the amorphous matrix. In addition, it is revealed that the Zr75Cu25 coating makes the Zr substrate exhibit excellent corrosion resistance, due to the robust passive film with a compact structure of the amorphous/nanocrystalline mixture.To improve corrosion and wear resistances of the Zirconium（Zr） based alloys which are widely applied in nuclear reactors and chemical corrosion-resistant equipment, a new surface modification scheme was designed to deposit a Zr75Cu25 coating on Zr substrate by using magnetron sputtering technique. The microstructure and the phase composition were characterized by scanning electron microscope, transmission electron microscope, and X-ray diffraction measurements. The tribological properties and the corrosion resistance were investigated by performing reciprocating tribo-tester and electrochemical tests, respectively.It is found that the Zr75Cu25 coating is made up of a mixture of amorphous and a-（Zr） nanocrystalline phases.The nanocrystalline particles with a size of 5-10 nm are homogenously dispersed in the amorphous matrix.The Zr75Cu25 coating shows excellent tribological properties, due to the dispersion strengthen caused by the homogeneous distribution of a-（Zr） nano-size particles among the amorphous matrix. In addition, it is revealed that the Zr75Cu25 coating makes the Zr substrate exhibit excellent corrosion resistance, due to the robust passive film with a compact structure of the amorphous/nanocrystalline mixture.

关 键 词：COATING materials MAGNETRON SPUTTERING microstructure vorrosion resistance TRIBOLOGICAL property 

分 类 号：TB[一般工业技术]