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Titolo:
Phase transformation and magnetostriction of (R-PR)(Fe-T)(2) (R=Dy, Tb; T=Co, Ni)
Autore:
Guo, ZJ; Zhang, ZD; Zhao, XG; Wang, BW; Geng, DY;
Indirizzi:
Chinese Acad Sci, Inst Met Res, Shenyang 110015, Peoples R China Chinese Acad Sci Shenyang Peoples R China 110015 110015, Peoples R China
Titolo Testata:
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
fascicolo: 2, volume: 16, anno: 2000,
pagine: 172 - 174
SICI:
1005-0302(200003)16:2<172:PTAMO(>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
--discip_EC--
Citazioni:
6
Recensione:
Indirizzi per estratti:
Indirizzo: Guo, ZJ Chinese Acad Sci, Inst Met Res, Shenyang 110015, Peoples R China Chinese Acad Sci Shenyang Peoples R China 110015 Peoples R China
Citazione:
Z.J. Guo et al., "Phase transformation and magnetostriction of (R-PR)(Fe-T)(2) (R=Dy, Tb; T=Co, Ni)", J MAT SCI T, 16(2), 2000, pp. 172-174

Abstract

Structure and magnetostriction of Dy1-xPrxFe2 (0 less than or equal to x less than or equal to 0.5), Dy0.6Pr0.4(Fe1-yTy)(2) (0 less than or equal to y less than or equal to 0.6), and Tb1-zPrz(Fe0.4Co0.6)(2) (0 less than or equal to z less than or equal to 1.0) alloys (T=Co, Ni) have been investigated. It is found that the matrix of the alloys Dy1-xPrxFe2 is a single phase(Dy, Pr)Fe-2 with MgCu2-type structure and the second phase is (Dy, Pr)Fe-3 when x less than or equal to 0.2. The amount of (Dy, Pr)Fe-3 phase increases with increasing Pr content and becomes the main phase when x=0.4. The matrix of Dy1-xPrxFe2 is found to be the (Dy, Pr)(2)Fe-17 phase with Th2Zn17-type structure when x=0.5. It is found that the amount of the cubic Laves phase (Dy, Pr)(Fe, Co)(2) in the Dy0.6Pr0.4(Fe1-yCoy)(2) increases with increasing Co concentration when 0 less than or equal to y less than or equal to 0.6. The substitution of Ni for Fe is nearly not favorable for the formation of the cubic Laves phase (Dy, Pr)(Fe, Ni)(2) in (Dy1-xPrx)Fe-2. The matrix of (Tb1-zPrz)(Fe0.4Co0.6)(2) is a (Tb, Pr)(Fe, Co)(2) phase with the MgCu2-type cubic Laves structure and a second phase of small amount is (Tb, Pr)(Fe, Co)(3) phase when z less than or equal to 0.2, z=0.5 and 1.0. When 0.2<z less than or equal to 0.4, the amount of the (Tb, Pr)(Fe, Co)(3) phase with PuNi3-type structure increases with increasing z and becomes the main phase when z=0.4. When 0.5<z less than or equal to 0.6 the amount of the (Tb, Pr)(Fe, Co)(3) phase increases sharply, whereas for 0.6<z less than orequal to 0.8 it decreases with increasing z. The polycrystalline magnetostriction, lambda(parallel to) - lambda(perpendicular to), at room temperature of Dy1-xPrxFe2 exhibits a peak when x=0.3. The lambda(parallel to) - lambda(perpendicular to) for Dy0.6Pr0.4(Fe1-yMy)(2) (M=Co, Ni) and Tb1-zPrz (Fe0.4Co0.6)(2) is also examined.

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Documento generato il 26/09/20 alle ore 11:48:55