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Effects of Cu addition on magnetic properties and microstructures of annealed Zr-Co-Cu-B ribbons

Title
Effects of Cu addition on magnetic properties and microstructures of annealed Zr-Co-Cu-B ribbons
Author
김종렬
Keywords
Melt-spinning; phase stability; rare-earth free magnet; rhombohedral Zr2Co11; ALLOYS; COERCIVITY; PHASE
Issue Date
2017-05
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE TRANSACTIONS ON MAGNETICS, v. 53, No. 11, Article no. 2101104
Abstract
The magnetic properties and microstructures of Zr18Co82-xCuxB2 (x = 0, 1, 2, 3, and 4) ribbons fabricated by melt-spinning technique were investigated to analyze the effects of Cu addition on the stabilization of a hard magnetic rhombohedral Zr2Co11 phase. In as-spun ribbons, the proportion of the rhombohedral Zr2Co11 phase increased up to x = 3. In addition, it was found that the Cu addition inhibited the decomposition of the rhombohedral Zr2Co11 phase into Co and ZrCo5 phases during the post-annealing process. In particular, annealed Zr18Co79Cu3B2 ribbons showed that the recrystallized grains having rhombohedral Zr2Co11 phase were grown as aligned rod-shaped grains with lengths of 200 nm. Thus, the Cu addition increased the coercivity of both as-spun and annealed ribbons. A maximum coercivity of 4.7 kOe was obtained in Zr18Co80Cu2B2 ribbons annealed at 550 degrees C.
URI
https://ieeexplore.ieee.org/document/7936527http://repository.hanyang.ac.kr/handle/20.500.11754/72052
ISSN
0018-9464; 1941-0069
DOI
10.1109/TMAG.2017.2710223
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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