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Titolo: Phase transformation and magnetostriction of (RPR)(FeT)(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:
 10050302(200003)16:2<172:PTAMO(>2.0.ZU;2B
 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 (RPR)(FeT)(2) (R=Dy, Tb; T=Co, Ni)", J MAT SCI T, 16(2), 2000, pp. 172174
Abstract
Structure and magnetostriction of Dy1xPrxFe2 (0 less than or equal to x less than or equal to 0.5), Dy0.6Pr0.4(Fe1yTy)(2) (0 less than or equal to y less than or equal to 0.6), and Tb1zPrz(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 Dy1xPrxFe2 is a single phase(Dy, Pr)Fe2 with MgCu2type structure and the second phase is (Dy, Pr)Fe3 when x less than or equal to 0.2. The amount of (Dy, Pr)Fe3 phase increases with increasing Pr content and becomes the main phase when x=0.4. The matrix of Dy1xPrxFe2 is found to be the (Dy, Pr)(2)Fe17 phase with Th2Zn17type 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(Fe1yCoy)(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 (Dy1xPrx)Fe2. The matrix of (Tb1zPrz)(Fe0.4Co0.6)(2) is a (Tb, Pr)(Fe, Co)(2) phase with the MgCu2type 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 PuNi3type 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 Dy1xPrxFe2 exhibits a peak when x=0.3. The lambda(parallel to)  lambda(perpendicular to) for Dy0.6Pr0.4(Fe1yMy)(2) (M=Co, Ni) and Tb1zPrz (Fe0.4Co0.6)(2) is also examined.
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Documento generato il 26/09/20 alle ore 11:48:55