The surface of Tb_(0.3)Dy_(0.7)Fe_(2) alloys was modified by microwave electron-cyclotron-resonance chemical vapor deposition(MW-ECR-CVD)and ion implantation technology,respectively.The microstructure and corrosion re...The surface of Tb_(0.3)Dy_(0.7)Fe_(2) alloys was modified by microwave electron-cyclotron-resonance chemical vapor deposition(MW-ECR-CVD)and ion implantation technology,respectively.The microstructure and corrosion resistance of nitrided layers were investigated by means of optical microscope(OM),X-ray diffractomer(XRD),auger electron spectroscopy(AES),and electrochemical workstation.After modified by MW-ECR-CVD,the nitrogen concentration of the nitrided layers decreases gradually with the depth increasing,while the nitrogen concentration modified by ion implantation process exhibits Gaussian distribution.The self-corrosion electric potential of the sample modified by ion implantation is higher than that modified by MW-ECR-CVD,which reveals that the samples modified by ion implantation process have a better resistance to corrosion.The magnetostrictions are assessed for the samples placed in the air for one year,which further confirms that the ion implantation process is more helpful to maintain the magnetostrictions.展开更多
基金financially supported by the National High Technology Research and Development Program of China(No.2011AA03A404)the National Natural Science Foundation of China(No.50801006)。
文摘The surface of Tb_(0.3)Dy_(0.7)Fe_(2) alloys was modified by microwave electron-cyclotron-resonance chemical vapor deposition(MW-ECR-CVD)and ion implantation technology,respectively.The microstructure and corrosion resistance of nitrided layers were investigated by means of optical microscope(OM),X-ray diffractomer(XRD),auger electron spectroscopy(AES),and electrochemical workstation.After modified by MW-ECR-CVD,the nitrogen concentration of the nitrided layers decreases gradually with the depth increasing,while the nitrogen concentration modified by ion implantation process exhibits Gaussian distribution.The self-corrosion electric potential of the sample modified by ion implantation is higher than that modified by MW-ECR-CVD,which reveals that the samples modified by ion implantation process have a better resistance to corrosion.The magnetostrictions are assessed for the samples placed in the air for one year,which further confirms that the ion implantation process is more helpful to maintain the magnetostrictions.
