Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7988187 | Intermetallics | 2018 | 5 Pages |
Abstract
The effect of large atomic radii Nb substitution on the structural and hard magnetic properties of Zr16Co78-xNbxSi3B3 nanocrystalline ribbons has been investigated. Structural and thermo-magnetic studies revealed that the substitution of Nb restrains the formation of both Co and orthorhombic Zr2Co11 phases in Zr-Co-Nb-Si-B which is essential for developing high coercivity. As a result, coercivity increases from 2.9 to 4.8â¯kOe as the Nb content increase from 0 to 3â¯at.%, while the magnetization decrease from 61 to 42 emu/g. The rhombohedral Zr2Co11 phase is responsible for the coercivity development in these materials. Substitution of Nb is found to decrease the Curie temperature from 440 to 390â¯Â°C as the Nb content increases from xâ¯=â¯0 to 3. Transmission electron microscopy studies demonstrate the grain refinement in the samples with substitution of Nb, where the grain size decreases from 150 to 50â¯nm as the Nb content increases from xâ¯=â¯0 to 3.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
N.V. Rama Rao, M.V. Nagendra, D.V. Sridhara Rao, D. Aravindha Babu, V.R. Chary, R.P. Mathur,