Improvement of coercive force in Fe-Ce·Didymium-B powder prepared by conventional powder techniques

Paik, C.R.; Miho, H.; Okada, Masuo; Homma, M.

doi:10.1109/tmag.1987.1065649

Cited by 16 publications

(3 citation statements)

References 7 publications

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“…The chemical polishing was found to lower the coercivity of the Nd-Fe-B powders by creating the etch pits on the surface on ground powders (Paik et al 1987). These pits were considered regions where domain walls nucleate more easily.…”

Section: Other Nucleation Methodsmentioning

confidence: 99%

Permanent magnets based on R-Fe-B and R-Fe-C alloys

Burzo

1998

Rep. Prog. Phys.

208

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A review is given on the basic properties of 2:14:1 hard magnetic phases as well as technological procedures used for manufacturing R-Fe-B and R-Fe-C permanent magnets. First, we analyse the phase diagrams, crystal structure of hard magnetic phases and composition ranges in which these phases form solid solutions, as a result of various types of substitution. Then, the magnetic properties of R 2 Fe 14 B-, R 2 Fe 14 C-and R 2 Co 14 Bbased compounds are described. The routes used for manufacturing R-Fe-B and R-Fe-C permanent magnets are detailed. The magnets' microstructure as well as their coercivities are described in correlation with composition and manufacturing routes. The properties of nanostructure magnets are then presented. Finally, the stability of Nd-Fe-B and Nd-Fe-C magnets in various working conditions is analysed.

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Section: Other Nucleation Methodsmentioning

confidence: 99%

Permanent magnets based on R-Fe-B and R-Fe-C alloys

Burzo

1998

Rep. Prog. Phys.

208

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“…However, these methods have some disadvantages. For instance, magnets produced by the pulverizing a cast ingot and a subsequent sintering do not show sufficient coercivities [11,12].…”

Section: Introductionmentioning

confidence: 99%

Nanocrystalline microstructure formation during hydrogen-induced phase transformations in Nd2Fe14B hard magnetic alloy

Rybalka¹

2012

LoM

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Донецкий национальный технический университет, ул. Артема 58, 83000 Донецк, Украина The kinetics and features of nanocrystalline microstructure formation during direct and reverse hydrogen-induced phase transformations in Nd 2 Fe 14 B alloy has been studied. It has been established that a hydrogen-vacuum treatment carried out in accordance with the kinetic data of transformations in Nd 2 Fe 14 alloy leads to a formation of nanocrystalline homogeneous microstructure with average grains size ~0.3 μm. It is shown that carrying out direct and reverse transformations taking into account of kinetic features of transformations as temperature and transformation time allow to avoid abnormal growth processes a main hard magnetic Nd 2 Fe 14 B phase that is one of the main factors for permanent magnets obtaining with high coercivity without very complicated and expensive of alloying procedures.

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“…However, these methods have some disadvantages [6]. For instance, magnets produced by pulverizing a cast ingot and a subsequent sintering did not show sufficient coercivities [7,8].…”

Section: Introductionmentioning

confidence: 99%