Structure and Properties of Nd-Fe-B Alloy Subjected to HDDR Process

• Autorzy: Szymański M. , Michalski B. , Leonowicz M. , Miazga Z.

Identyfikatory

DOI

10.1515/amm-2016-0040

• Języki publikacji: EN

Abstrakty

EN

In this paper the Hydrogenation, Disproportionation, Desorption and Recombination (HDDR) route was tested, for the Nd-Fe-B master alloy, as a prospective procedure for recycling of sintered scrap neodymium magnets. The HDDR method is based on the hydrogen induced reversal phase transformation of Nd-Fe-B alloy: Nd₂Fe₁₄B + (2±x) H₂ = 2NdH_2±x + Fe₂B + 12Fe. Microstructural observations (SEM), phase constitution studies (XRD) and measurement of magnetic properties (VSM) were done to investigate the HDDR transformation progress. It was observed that disproportionation reaction starts at the grain boundaries, where the Nd-rich phase is located. Average grain size was reduced and coercive material was produced as a result of the HDDR process. Obtained results are similar to literature data.

Słowa kluczowe

EN

HDDR; magnets hydrogenation; Nd-Fe-B alloy; neodymium magnets; magnets recycling

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2016
• Tom: Vol. 61, iss. 1
• Strony: 217--220
• Opis fizyczny: Bibliogr. 16 poz., rys., wykr.

Twórcy

autor

Szymański M.

• Warsaw University of Technology, The Faculty of Materials Science and Engineering , 02-507 Warszawa , 141 Wołoska Street, Poland

autor

Michalski B.

• Warsaw University of Technology, The Faculty of Materials Science and Engineering , 02-507 Warszawa , 141 Wołoska Street, Poland

autor

Leonowicz M.

• Warsaw University of Technology, The Faculty of Materials Science and Engineering , 02-507 Warszawa , 141 Wołoska Street, Poland

autor

Miazga Z.

• P.P.H.U. Polblume Zbigniew Miazga, 05-502 Piaseczno, 35 11-Go Listopada Street, Poland

Bibliografia

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę