Microstructure evolution and coercivity enhancement in Nd-Fe-B thin films diffusion-processed by R-Al alloys (R=Nd, Pr)
Source abstract
Abstract
Diffusion process by Nd-Al and Pr-Al alloys was compared and investigated in Nd-Fe-B thin films. Enhanced coercivity 2.06T and good squareness was obtained by using Pr85Al15 and Nd85Al15 alloys as diffusion sources. But the coercivity of diffusion-processed thin films by Pr70Al30 and Pr55Al45 alloys decreased to 2.04T and 1.82T. High ambient coercivity of 2.26T was achieved in diffusion-processed thin film by Nd70Al30 leading to an improved coercivity thermal stability because Nd2Fe14B grains were enveloped by Nd-rich phase as seen by transmission electron microscopy Nd-loss image. Meanwhile, microstructure-dependent parameters α and Neff were improved. However, high content of Al in diffusion-processed thin film by Nd55Al45 lead to degraded texture and coercivity.
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Research context
OpenAlex topics: Magnetic Properties of Alloys · Rare-earth and actinide compounds · Metallurgical and Alloy Processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key laboratory of electromagnetic processing of materials (Ministry of Education), Northeastern University 1 , Shenyang 110819, China
Department of Physics and Chemistry of Materials, School of Materials Science and Engineering, Northeastern University 2 , Shenyang 110819, China
Jiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology 3 , Ganzhou 341000, China
Funding
Ministry of Education of the People's Republic of China · National Natural Science Foundation of China
References (7)
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