期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 585, 期 -, 页码 485-490出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.09.191
关键词
Mechanical alloying; Amorphous materials; Co-based alloys
资金
- Spanish Ministry of Science and Innovation (MICINN)
- EU FEDER [MAT2010-20537]
- PAI of the Regional Government of Andalucia (RGA) [P10-FQM-6462]
- Spanish Ministry of Education
- RGA
Co62Nb6Zr2B30 composition was mechanically alloyed using three different types of boron powders in the starting mixture: crystalline beta-B, commercial amorphous B and optimized amorphous B via ball milling. Using optimized amorphous B, amorphization process of the alloy is more efficient but milling to optimize amorphous B introduces some iron contamination. Boron inclusions (100-150 nm in size) remain even after long milling times. However, using amorphous boron reduces the fraction of boron distributed as inclusions to similar to 40% of the total B. Thermal stability at the end of the milling process is affected by the initial boron microstructure. Coercivity is reduced a half using amorphous B instead of crystalline B in the starting mixture. (C) 2013 Elsevier B. V. All rights reserved.
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