Structure and magnetism of the Pr2Fe14-xCoxB system

Pȩdziwiatr, A.T.; Jiang, S. Y.; Wallace, W.E.

doi:10.1016/0304-8853(86)90730-4

Cited by 41 publications

(16 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These compounds crystallize in tetragonal structure with P4 2 /mnm space group, where the RE ions are located on two different crystallographic sites and Fe (or Co) atoms occupy six nonequivalent crystallographic sites. Some of these studies have been carried out in order to improve magnetic properties (increase of Curie temperature (T C ), anisotropy field (H A ) and saturation magnetisation (M S )) by partial substitution of cobalt for iron atoms [3][4][5][6]. Drastic modifications of their fundamental properties have been achieved, especially those related to the magnetocrystalline anisotropy [7].…”

Section: Introductionmentioning

confidence: 99%

Influence of Co substitution on magnetoelastic properties of Er2Fe14−xCoxB (x=1, 3 and 5) intermetallic compounds

Khoshnoud

Tajabor

Fruchart

et al. 2009

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Influence of Co substitution on magnetoelastic properties of Er2Fe14−xCoxB (x=1, 3 and 5) intermetallic compounds

Khoshnoud

Tajabor

Fruchart

et al. 2009

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…On the other hand, addition of A1 up to 3 at% causes an increase in the value of coercivity, however, higher A1 concentration leads to decrease in H,. In Co and A1 substituted sintered RE-Fe-B (RE = Nd, Pr) type magnets the anisotropy field H A is determined by the Co concentration [6,7], because A1 practically has no influence on the anisotropy field 1231. Therefore, the origin of the enhancement of ,H, by A1 addition .…”

Section: Discussionmentioning

confidence: 99%

Magnetic properties and microstructural characterization of sintered Pr16Fe76–x–yCoxAlyB8 (0 <x < 20;0 <y < 8) magnets

Szymura¹,

Rabinovich²,

Bala

et al. 1994

Phys. Stat. Sol. (a)

View full text Add to dashboard Cite

A number of Pr16Fe76–x–yCoxAlyB8 (0 < x < 20;0 < y < 8) magnets are prepared by conventional powder metallurgy processes. Magnetic measurements indicate that the magnet coercivity (jHc) increases as y increases up to about 3 and decreases as x and y increase up to 20 and >3, respectively. The remanence (Br) decreases with increasing of x and y concentrations. When x and y are added at the same time, jHc and Br are mainly determined by the x and y concentrations. The microstructure and the chemical composition of the phase structure are also determined for the cast and sintered alloys. The good magnetic properties are attributed to grain size and improved magnetic isolation of the individual grains, which is promoted by addition of Al up to 3 at %. In particular, this is apparent in magnets with Co additions (Co additions cause grain growth during the sintering process).

show abstract

“…Na estrutura TR-Fe-B há 56 átomos de ferro. A substituição do ferro até um número de 16 átomos de cobalto apresenta um ganho na T C de aproximadamente 50 K por átomo (Pedziwiatr et al, 1986a). Para maiores substituições o ganho na T C é de somente 11 K por átomo adicionado.…”

Section: -Substituição Química E Adição De Dopantesunclassified

“…3.9. A T C aumenta quando o ferro é substituído por cobalto, níquel, silício, cobre ou gálio e diminui quando o ferro é substituído por vanádio, cromo, manganês, rutênio, alumínio, germânio e berílio (Fuerts et al, 1986;Ku et al, 1986;Pedziwiatr et al, 1986a;Burzo, 1987;Jurczyk et al, 1987;Ku e Yen, 1987;Sagawa et al, 1987;Chuang et al, 1988;Kowalczyk e Wrzeciono, 1988 a,b;Kowalczyk et al,1988;Xie et al, 1988;Burzo e Plugaru, 1990).…”

Section: -Compostos Tr 2 Fe 14 B Multielementares Em Substituição Ao unclassified

“…A adição do cobalto na liga Pr-Fe-B-Nb teve como objetivo inicial aumentar a temperatura de Curie (T C ). A adição de cobalto no sistema Pr 8 Fe 56-x Co x B 4 para x ≤ 16 aumenta a T C em 50 K e para valores de x > 16 a T C aumenta em 11 K por átomo de ferro substituído (Pedziwiatr et al, 1986a;Overfeld e Becker, 1984). O ganho no aumento da T C a partir de x > 16 fica inviável do ponto de vista comercial devido ao alto custo do cobalto.…”

Section: -Adição De Cobalto à Liga Pr-fe-b-nbunclassified

See 1 more Smart Citation

Estudo de ligas e ímãs preparados pelo processo hidrogenação, desproporção, dessorção e recombinação (HDDR) à base de Pr-Fe-B com adição de dopantes elementos de liga

Galego¹

View full text Add to dashboard Cite

À minha esposa Marilene O número explica o universo-Lema dos Pitagóricos i AGRADECIMENTOS Agradeço ao PhD. Rubens Nunes de Faria Jr. pela orientação deste trabalho, pela amizade e apoio. Agradeço ao Dr. José Mestnik Filho pela ajuda e tempo dedicado na etapa dos cálculos teóricos utilizados nesta tese, ao apoio e valiosas discussões. Agradeço à Professora Dra. Helena Maria Petrilli pela ajuda na introdução aos cálculos teóricos (ab-initio), pelo tempo dedicado e por permitir o uso de sua área de processamento de dados no CCE-USP.

show abstract

Structure and magnetism of the Pr2Fe14-xCoxB system

Cited by 41 publications

References 17 publications

Influence of Co substitution on magnetoelastic properties of Er2Fe14−xCoxB (x=1, 3 and 5) intermetallic compounds

Influence of Co substitution on magnetoelastic properties of Er2Fe14−xCoxB (x=1, 3 and 5) intermetallic compounds

Magnetic properties and microstructural characterization of sintered Pr16Fe76–x–yCoxAlyB8 (0 <x < 20;0 <y < 8) magnets

Estudo de ligas e ímãs preparados pelo processo hidrogenação, desproporção, dessorção e recombinação (HDDR) à base de Pr-Fe-B com adição de dopantes elementos de liga

Contact Info

Product

Resources

About