Microstructural Evaluation of Nd-Fe-B Strip Cast Alloys

The precipitation behavior, especially the early nucleation stages, of the industrial strip-cast Al3003 alloys was investigated by using transmission electron microscopy (TEM). An icosahedral quasicrystalline phase was found as secondary particles in these strip-cast alloys after heat treatment for a few seconds. Three different nucleation paths are proposed based on the TEM observations. They have the same origin, viz. (Mn, Fe)-containing Mackay icosahedra, and are governed by the composition of alloys, especially the Mn and Si content.

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Effects of HDDR treatment on structure, morphology and particle size of Nd-Fe-B powders prepared by ball milling of Nd-Fe-B strip cast alloys

Journal of Magnetism and Magnetic Materials ◽

10.1016/j.jmmm.2020.167417 ◽

2021 ◽

Vol 519 ◽

pp. 167417

Author(s):

Bin Ma ◽

Xiaoqian Bao ◽

Aizhi Sun ◽

Jiheng Li ◽

Xuexu Gao

Keyword(s):

Particle Size ◽

Ball Milling ◽

Structure Morphology ◽

Cast Alloys ◽

Strip Cast

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Magnetic properties of Sm2+αFe17N powders prepared from bulk and strip-cast alloys

Journal of Magnetism and Magnetic Materials ◽

10.1016/j.jmmm.2020.167416 ◽

2021 ◽

Vol 518 ◽

pp. 167416

Author(s):

D.A. Kolodkin ◽

A.G. Popov ◽

A.V. Protasov ◽

V.S. Gaviko ◽

D.Yu. Vasilenko ◽

...

Keyword(s):

Magnetic Properties ◽

Cast Alloys ◽

Strip Cast

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Magnetic properties of anisotropic Nd–Fe–B HDDR powders prepared from strip cast alloys

Journal of Alloys and Compounds ◽

10.1016/s0925-8388(03)00756-4 ◽

2004 ◽

Vol 366 (1-2) ◽

pp. 274-278 ◽

Cited By ~ 14

Author(s):

K. Morimoto ◽

K. Kato ◽

K. Igarashi ◽

R. Nakayama

Keyword(s):

Magnetic Properties ◽

Cast Alloys ◽

Strip Cast

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Static recrystallization of strip cast alloys in the presence of complex nano-sulfide and nitride precipitates

Materials Science and Engineering A ◽

10.1016/j.msea.2013.05.070 ◽

2013 ◽

Vol 581 ◽

pp. 39-47 ◽

Cited By ~ 13

Author(s):

Shokoufeh Malekjani ◽

Ilana. B. Timokhina ◽

Jiangting Wang ◽

Peter D. Hodgson ◽

Nicole E. Stanford

Keyword(s):

Static Recrystallization ◽

Cast Alloys ◽

Strip Cast

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Microstructure evolution and coercivity mechanism of hydrogenation-disproportionation-desorption-recombination (HDDR) treated Nd-Fe-B strip cast alloys

Journal of Rare Earths ◽

10.1016/j.jre.2021.03.018 ◽

2021 ◽

Author(s):

Bin Ma ◽

Xiaoqian Bao ◽

Aizhi Sun ◽

Jiheng Li ◽

Xuexu Gao

Keyword(s):

Microstructure Evolution ◽

Cast Alloys ◽

Strip Cast ◽

Coercivity Mechanism

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Microstructural Evaluation of Silicon Carbide Whisker Reinforced Alumina Fabricated with Carbon-Coated Whiskers

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100088919 ◽

1991 ◽

Vol 49 ◽

pp. 920-921

Author(s):

K. B. Alexander ◽

P. F. Becher

Keyword(s):

Silicon Carbide ◽

High Resolution Electron Microscopy ◽

Ceramic Composites ◽

Interface Debonding ◽

Resolution Electron ◽

Microstructural Evaluation ◽

Carbon Coated ◽

Electron Energy Loss ◽

Interfacial Films ◽

Debonding Process

The presence of interfacial films at the whisker-matrix interface can significantly influence the fracture toughness of ceramic composites. The film may alter the interface debonding process though changes in either the interfacial fracture energy or the residual stress at the interface. In addition, the films may affect the whisker pullout process through the frictional sliding coefficients or the extent of mechanical interlocking of the interface due to the whisker surface topography.Composites containing ACMC silicon carbide whiskers (SiCw) which had been coated with 5-10 nm of carbon and Tokai whiskers coated with 2 nm of carbon have been examined. High resolution electron microscopy (HREM) images of the interface were obtained with a JEOL 4000EX electron microscope. The whisker geometry used for HREM imaging is described in Reference 2. High spatial resolution (< 2-nm-diameter probe) parallel-collection electron energy loss spectroscopy (PEELS) measurements were obtained with a Philips EM400T/FEG microscope equipped with a Gatan Model 666 spectrometer.

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