Microstructure evolution and coercivity enhancement in Nd-Fe-B thin films diffusion-processed by R-Al alloys (R=Nd, Pr)

Yigao Xie; Yang Yang; Tongbo Zhang; Yanqing Fu; Qingzheng Jiang; Shengcan Ma; Zhenchen Zhong; Weibin Cui; Qiang Wang

doi:10.1063/1.5006110

AIP Advances (May 2018)

Microstructure evolution and coercivity enhancement in Nd-Fe-B thin films diffusion-processed by R-Al alloys (R=Nd, Pr)

Yigao Xie,
Yang Yang,
Tongbo Zhang,
Yanqing Fu,
Qingzheng Jiang,
Shengcan Ma,
Zhenchen Zhong,
Weibin Cui,
Qiang Wang

Affiliations

Yigao Xie: Key laboratory of electromagnetic processing of materials (Ministry of Education), Northeastern University, Shenyang 110819, China
Yang Yang: Key laboratory of electromagnetic processing of materials (Ministry of Education), Northeastern University, Shenyang 110819, China
Tongbo Zhang: Key laboratory of electromagnetic processing of materials (Ministry of Education), Northeastern University, Shenyang 110819, China
Yanqing Fu: Key laboratory of electromagnetic processing of materials (Ministry of Education), Northeastern University, Shenyang 110819, China
Qingzheng Jiang: Jiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, China
Shengcan Ma: Jiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, China
Zhenchen Zhong: Jiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, China
Weibin Cui: Key laboratory of electromagnetic processing of materials (Ministry of Education), Northeastern University, Shenyang 110819, China
Qiang Wang: Key laboratory of electromagnetic processing of materials (Ministry of Education), Northeastern University, Shenyang 110819, China

DOI: https://doi.org/10.1063/1.5006110
Journal volume & issue: Vol. 8, no. 5
pp. 056202 – 056202-5

Abstract

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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.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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