Effect Of The Desorption-Recombination Temperature On The Microstructure And Magnetic Properties Of HDDR Processed Nd-Fe-B Powders

• Autorzy: Lee J.-G. , Cha H.-R. , Liu S. , Yu J.-H. , Baek Y.-K. , Kwon H.-W.

Identyfikatory

DOI

10.1515/amm-2015-0160

Warianty tytułu

PL

Wpływ temperatury desorpcji-rekombinacji na mikrostrukturę i właściwości magnetyczne proszków Nd-Fe-B przetwarzanych metodą HDDR

• Języki publikacji: EN

Abstrakty

EN

The effect of the desorption-recombination temperature on the microstructure and magnetic properties of hydrogenation-disproportionation-desorption-recombination (HDDR) processed Nd-Fe-B powders was studied. The Nd_xB_6.4Ga_0.3Nb₂0.2Fe_bal (x=12.5-13.5, at.%) casting alloys were pulverized after homogenizing annealing, and then subjected to HDDR treatment. During the HDDR process, desorption-recombination (DR) reaction was induced at two different temperature, 810°C and 820°C. The higher Nd content resulted in enhanced coercivity of the HDDR powder, and which was attributed to the thicker and more uniform Nd-rich phase along grain boundaries. But this uniform Nd-rich phase induced faster grain growth. The remanence of the powder DR-treated at 820°C is higher than that DR-treated at 810°C. In addition, it was also confirmed that higher DR temperature is much more effective to improve squareness.

Słowa kluczowe

EN

Nd-Fe-B; HDDR; permanent magnet; grain boundary

PL

Nd-Fe-B; metoda HDDR; magnes trwały; granica ziarna

• 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: 2015
• Tom: Vol. 60, iss. 2B
• Strony: 1499--1501
• Opis fizyczny: Bibliogr. 13 poz., rys.

Twórcy

autor

Lee J.-G.

• Powder&Ceramics Division, Korea Institute of Materials Science, 797 Changwondaero, Changwon 642-831, Korea

autor

Cha H.-R.

• Powder&Ceramics Division, Korea Institute of Materials Science, 797 Changwondaero, Changwon 642-831, Korea
• School of Materials Science and Engineering, Busan National University, Jangjeon 2-Dong, Geumjeong-Gu, Busan 609-735, Korea

autor

Liu S.

• Powder&Ceramics Division, Korea Institute of Materials Science, 797 Changwondaero, Changwon 642-831, Korea
• School of Materials Science and Engineering, Busan National University, Jangjeon 2-Dong, Geumjeong-Gu, Busan 609-735, Korea

autor

Yu J.-H.

• Powder&Ceramics Division, Korea Institute of Materials Science, 797 Changwondaero, Changwon 642-831, Korea

autor

Baek Y.-K.

• Powder&Ceramics Division, Korea Institute of Materials Science, 797 Changwondaero, Changwon 642-831, Korea

autor

Kwon H.-W.

• Department of Materials Science and Engineering, Pukyong National University, 45 Yongso-Ro, Nam-Gu, Busan 608-737, Korea

Bibliografia

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