The Effect of the Rate of Cooling from High-Temperature Single-Phase Region on the Microstructure and Magnetic Properties of AlNi Alloys

2014 ◽  
Vol 46 (2) ◽  
pp. 656-664 ◽  
Author(s):  
Vladimir P. Menushenkov ◽  
Mikhail V. Gorshenkov ◽  
Elena S. Savchenko ◽  
Dmitry G. Zhukov
Keyword(s):  
Magnetic Properties ◽  
High Temperature ◽  
Single Phase ◽  
Phase Region ◽  
Single Phase Region ◽  
Rate Of Cooling ◽  
Microstructure And Magnetic Properties

Microstructure and Magnetic Properties of RE2.28Fe13.58B1.14 Alloys

2016 ◽  
Vol 848 ◽  
pp. 709-714 ◽  
Author(s):  
Gang Fu ◽  
Jiang Wang ◽  
Mao Hua Rong ◽  
Guang Hui Rao ◽  
Huai Ying Zhou
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Rare Earth ◽  
Single Phase ◽  
Permanent Magnets ◽  
Industrial Applications ◽  
Arc Melting ◽  
Light Rare Earth Elements ◽  
Curie Temperatures ◽  
Microstructure And Magnetic Properties

The rare-earth (RE) permanent magnets based on Nd2Fe14B with excellent magnetic properties have been widely used in industrial applications. In this work, the crystal structure, microstructure and magnetic properties of Nd2.28Fe13.58B1.14, Ce2.28Fe13.58B1.14 and Pr2.28Fe13.58B1.14 alloys prepared by arc-melting were investigated. The results show that all alloys are single phase with tetragonal Nd2Fe14B-type (space group P42/mnm). The Curie temperatures (Tc) of RE2.28Fe13.58B1.14 (RE=Nd, Ce, Pr) alloys are 583 K, 423 K and 557 K, respectively. On the other hand, the coercivities of Nd2.28Fe13.58B1.14 and Pr2.28Fe13.58B1.14 alloys are about 1.05 T and 1.23 T, respectively, while that of Ce2.28Fe13.58B1.14 alloy is only about 0.25 T due to the poor squareness of hysteresis loop. Meanwhile, the saturation magnetizations of Nd2.28Fe13.58B1.14 and Pr2.28Fe13.58B1.14 alloys are about 135 emu/g and 113 emu/g, respectively, while that of Ce2.28Fe13.58B1.14 alloy is about 97 emu/g. It was indicated that the Curie temperatures and magnetic properties of RE2.28Fe13.58B1.14 alloys with the same crystal structure are dependent on light rare earth elements.

Experimental Study of High Temperature Hydrozing Annealing 1J50 Alloy's Magnetic Properties

2013 ◽  
Vol 135 (6) ◽  
Author(s):  
Yingtao Zhang ◽  
Gang Wang ◽  
Zhenguo Nie ◽  
Wankai Shi ◽  
Yiming Rong
Keyword(s):  
Magnetic Properties ◽  
High Temperature ◽  
Process Parameters ◽  
Quantitative Research ◽  
Annealing Process ◽  
National Standards ◽  
Magnetic Alloy ◽  
Soft Magnetic ◽  
Soft Magnetic Alloy ◽  
Microstructure And Magnetic Properties

The good DC magnetic properties can be achieved for 1J50 soft magnetic alloy by applying high temperature hydrogen annealing. Annealing process parameters, e.g., atmosphere, soaking temperature, and time, are critical to soft magnetic properties. Qualitative results had been done for years. However a quantitative research among process parameters, microstructure, and magnetic properties can be more comprehensive and specific. In this study, a serial of experiments for 1J50 samples under the Chinese national standards. The influence of annealing temperature and socking time on DC magnetic properties and microstructure of the samples has been investigated on DC magnetic properties and microstructure of samples. The result shows that annealing process parameters have a nonlinear effect on the development of material microstructure and magnetic properties. Furthermore, the models among magnetic property, grain size, and process parameters have been built to quantitatively describe the interrelationship in between.

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