کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1801227 | 1024563 | 2010 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effects of excessive grain growth on the magnetic and mechanical properties of hot-deformed NdFeB magnets Effects of excessive grain growth on the magnetic and mechanical properties of hot-deformed NdFeB magnets](/preview/png/1801227.png)
The magnetic and mechanical properties of rare-earth magnets hot-deformed at temperature range 750–950 °C have been investigated. The grains tended to grow excessively from dozens of nanometers to several microns at the temperatures above 850 °C. The alignment of grains was disrupted by the hot deformation at the high temperatures. The Nd-rich phase was extruded at the temperatures which are higher than 850 °C. The Nd-rich phase extrusion resulted in the reduction of density by 1% and the reduction of remanence from 1.42 to 0.72 T. The reduction of grain boundaries caused by flat platelet-shaped grains changing to spherical grains and the weak binding strength among large grains of Nd2Fe14B phase may be the main reasons for the low mechanical strength of hot-deformed magnets.
Journal: Journal of Magnetism and Magnetic Materials - Volume 322, Issue 15, August 2010, Pages 2268–2271