Magnetic hardening of Zr₂Co₁₁:(Ti, Si) nanomaterials

Authors

Wenyong Zhang, University of Nebraska-LincolnFollow
Shah R. Valloppilly, University of Nebraska-LincolnFollow
Xingzhong Li, University of Nebraska-LincolnFollow
Yi Liu, University of Nebraska-LincolnFollow
Steven A. Michalski, University of Nebraska-LincolnFollow
T A. George, University of Nebraska-Lincoln
Ralph A. Skomski, University of Nebraska - LincolnFollow
David J. Sellmyer, University of Nebraska-LincolnFollow

Date of this Version

2014

Citation

Journal of Alloys and Compounds 587, 2014

Abstract

The role of Ti and Si additions in the magnetic hardening of rapidly quenched Zr₂Co₁₁-based nano-materials has been investigated. Nanocrystalline Zr_17–xTi_xCo₈₃ and Zr₁₈Co_82–ySi_y are mainly composed of rhombohedral Zr₂Co₁₁ and a small amount of orthorhombic Zr₂Co₁₁, hcp Co, and cubic Zr₆Co₂₃. Ti addition decreases the mean grain size of the magnetic phases, and thus increases coercivity and energy product from 1.6 kOe and 1.9 MGOe for x = 0 to 2.6 kOe and 3.9 MGOe for x = 2, respectively. Si addition enhances the anisotropy field of the hard phase which increases the coercivity but slightly decreases the magnetization. This work shows that Ti has a positive effect on energy product through refinement of structure.