Microstructure and magnetostrictive performance of NbC-doped〈100〉oriented Fe-Ga alloys

The〈100〉oriented Fe83Ga17 alloy rods with various NbC contents less than 1at%were prepared by the directional solidification method at a growth rate of 720 mm·h^-1. Low NbC-content was found to affect the oriented grain growth and slightly improve the〈100〉ori-entation. Flat grain boundaries in the a...

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Published in:矿物冶金与材料学报：英文版 2015 (1), p.52-58
Main Author: Chao Yuan Ji-heng Li Wen-lan Zhang Xiao-qian Bao Xue-xu Gao
Format: Article
Language:English
Subjects:
C掺杂
NbC
合金
应变灵敏度
显微组织
磁致伸缩应变
磁致伸缩性能
铁
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description The〈100〉oriented Fe83Ga17 alloy rods with various NbC contents less than 1at%were prepared by the directional solidification method at a growth rate of 720 mm·h^-1. Low NbC-content was found to affect the oriented grain growth and slightly improve the〈100〉ori-entation. Flat grain boundaries in the alloys with low NbC contents less than 0.2at%became greatly curved at higher NbC contents, and a large amount of Nb-rich precipitates were observed in the alloys with high NbC contents. Small amounts of NbC, less than 0.2at%, resulted in an increase in magnetostrictive strain due to the improvement of the〈100〉orientation, and a high magnetostrictive strain value of 335 ×10^-6 under a pre-stress of 15 MPa was obtained in the 0.1at%NbC-doped alloys. The magnetostrictive performance obviously decreased with the NbC addition higher than 0.5at%, and the strain sensitivity under no pre-stress was lower than that in the binary Fe？Ga alloy.
doi_str_mv 10.1007/s12613-015-1043-9
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source Springer Nature
subjects C掺杂
NbC
合金
应变灵敏度
显微组织
磁致伸缩应变
磁致伸缩性能
铁
title Microstructure and magnetostrictive performance of NbC-doped〈100〉oriented Fe-Ga alloys
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