Surface modification of (Tb0.3Dy0.7)Fe1.95 alloy by ion nitriding process

Li, Kuoshe; Li, Hongwei; Yan, Hui; Yu, Dunji; Wang, Fengying; Zhang, Shirong; Zhang, Guocheng

doi:10.1016/s1002-0721(08)60227-6

Cited by 4 publications

(1 citation statement)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Rare earth elements have lower standard electrode potentials because of the special electron shell, such as u Tb 3þ =Tb = -2.391 V, u Dy 3þ =Dy = -2.353 V. However, the standard electrode potential of iron element is comparatively higher (u Fe 3þ =Fe = -0.4402 V). This large difference in standard electrode potentials will lead to electrochemical corrosion in (Tb,Dy)Fe 2 alloy easily when it is in corrosive environment [5]. With the rapid expansion of the applied fields, the corrosion and degradation caused by magnetic field, stress, and environmental media often occur.…”

Section: Introductionmentioning

confidence: 99%

Structure and properties of Tb0.3Dy0.7Fe2 alloys modified by surface nitriding

Yang

Zhang

et al. 2014

Rare Met.

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%