کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1627197 | 1516448 | 2006 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of Nb and C additives on the microstructures and magnetic properties of rapidly solidified Sm-Co alloys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of Nb and C additives on the microstructures and magnetic properties of rapidly solidified Sm-Co alloys Effect of Nb and C additives on the microstructures and magnetic properties of rapidly solidified Sm-Co alloys](/preview/png/1627197.png)
چکیده انگلیسی
Highly coercive Sm-Co-based permanent magnets have been achieved through simple modification of binary Sm12Co88 alloys with Nb, C or combined Nb and C at concentrations ranging from 1 to 10 atomic percent processed via rapid solidification. Melt spinning at 40Â m/s resulted in the formation of the metastable TbCu7-type structure in all alloys. While the unalloyed, as-solidified Sm12Co88 alloy displayed a coercivity of 0.5Â kOe, alloying additions resulted in a systematic and profound increase in coercivity. Nb additions resulted in as-solidified coercivities up to 9Â kOe, C additions up to 37Â kOe, and combined NbC additons 8Â kOe. The Nb and NbC additions led to a reduction in grain size, while C additions altered the morphology, producing a grain-boundary phase that effectively isolated the magnetic grains from one another. The magnetization processes for Nb- and NbC-modified Sm-Co were determined to be nucleation-controlled, while a transition to pinning-controlled magnetization was observed for the C-modified alloy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 425, Issues 1â2, 30 November 2006, Pages 416-423
Journal: Journal of Alloys and Compounds - Volume 425, Issues 1â2, 30 November 2006, Pages 416-423
نویسندگان
S. Aich, J.E. Shield,