Nanoscale precipitates and phase transformations in a rapidly-solidified Fe-Pt-B amorphous alloy

Dmitri V. Louzguine-Luzgin; Wei Zhang; Akihisa Inoue

doi:10.1016/j.jallcom.2005.03.089

Nanoscale precipitates and phase transformations in a rapidly-solidified Fe-Pt-B amorphous alloy

Dmitri V. Louzguine-Luzgin, Wei Zhang, Akihisa Inoue

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

The phase transformations in a rapidly solidified (Fe_0.75Pt _0.25)₇₅B₂₅ alloy on heating were studied by X-ray diffractometry, differential scanning and isothermal calorimetries. An as-solidified structure was examined by transmission electron microscopy (TEM). The results of TEM, including nano-beam diffraction and high-resolution imaging, clearly indicate the existence of nano-scale cubic cF4 Fe(Pt) solid solution particles within the as-solidified amorphous matrix. The particles of the cF4 Fe(Pt) phase start growing at elevated temperature and undergo ordering forming a tP4 FePt compound followed by the precipitation of a tI12 Fe₂B phase from the residual amorphous matrix. The ordering of the cubic phase takes place after an incubation period which allows to anticipate a nucleation and growth mechanism. This process is followed by further growth of the particles. The transformation behavior on heating is studied in detail.

Original language	English
Pages (from-to)	78-83
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	402
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2005.03.089
Publication status	Published - 2005 Oct 27

Keywords

Amorphous materials
Calorimetry
Liquid quenching
Nano-structures
Transmission electron microscopy

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2005.03.089

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title = "Nanoscale precipitates and phase transformations in a rapidly-solidified Fe-Pt-B amorphous alloy",

abstract = "The phase transformations in a rapidly solidified (Fe0.75Pt 0.25)75B25 alloy on heating were studied by X-ray diffractometry, differential scanning and isothermal calorimetries. An as-solidified structure was examined by transmission electron microscopy (TEM). The results of TEM, including nano-beam diffraction and high-resolution imaging, clearly indicate the existence of nano-scale cubic cF4 Fe(Pt) solid solution particles within the as-solidified amorphous matrix. The particles of the cF4 Fe(Pt) phase start growing at elevated temperature and undergo ordering forming a tP4 FePt compound followed by the precipitation of a tI12 Fe2B phase from the residual amorphous matrix. The ordering of the cubic phase takes place after an incubation period which allows to anticipate a nucleation and growth mechanism. This process is followed by further growth of the particles. The transformation behavior on heating is studied in detail.",

keywords = "Amorphous materials, Calorimetry, Liquid quenching, Nano-structures, Transmission electron microscopy",

author = "Louzguine-Luzgin, {Dmitri V.} and Wei Zhang and Akihisa Inoue",

note = "Funding Information: This work was supported by the Grant-in-Aid of Ministry of Education, Sports, Culture, Science and Technology, Japan, Priority Area on “Materials Science on Bulk Metallic Glasses” and the Grant-in-Aid (Wakate B) of Ministry of Education, Sports, Culture, Science and Technology, Japan N: 16760559.",

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doi = "10.1016/j.jallcom.2005.03.089",

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AU - Louzguine-Luzgin, Dmitri V.

AU - Zhang, Wei

AU - Inoue, Akihisa

N1 - Funding Information: This work was supported by the Grant-in-Aid of Ministry of Education, Sports, Culture, Science and Technology, Japan, Priority Area on “Materials Science on Bulk Metallic Glasses” and the Grant-in-Aid (Wakate B) of Ministry of Education, Sports, Culture, Science and Technology, Japan N: 16760559.

PY - 2005/10/27

Y1 - 2005/10/27

N2 - The phase transformations in a rapidly solidified (Fe0.75Pt 0.25)75B25 alloy on heating were studied by X-ray diffractometry, differential scanning and isothermal calorimetries. An as-solidified structure was examined by transmission electron microscopy (TEM). The results of TEM, including nano-beam diffraction and high-resolution imaging, clearly indicate the existence of nano-scale cubic cF4 Fe(Pt) solid solution particles within the as-solidified amorphous matrix. The particles of the cF4 Fe(Pt) phase start growing at elevated temperature and undergo ordering forming a tP4 FePt compound followed by the precipitation of a tI12 Fe2B phase from the residual amorphous matrix. The ordering of the cubic phase takes place after an incubation period which allows to anticipate a nucleation and growth mechanism. This process is followed by further growth of the particles. The transformation behavior on heating is studied in detail.

AB - The phase transformations in a rapidly solidified (Fe0.75Pt 0.25)75B25 alloy on heating were studied by X-ray diffractometry, differential scanning and isothermal calorimetries. An as-solidified structure was examined by transmission electron microscopy (TEM). The results of TEM, including nano-beam diffraction and high-resolution imaging, clearly indicate the existence of nano-scale cubic cF4 Fe(Pt) solid solution particles within the as-solidified amorphous matrix. The particles of the cF4 Fe(Pt) phase start growing at elevated temperature and undergo ordering forming a tP4 FePt compound followed by the precipitation of a tI12 Fe2B phase from the residual amorphous matrix. The ordering of the cubic phase takes place after an incubation period which allows to anticipate a nucleation and growth mechanism. This process is followed by further growth of the particles. The transformation behavior on heating is studied in detail.

KW - Amorphous materials

KW - Calorimetry

KW - Liquid quenching

KW - Nano-structures

KW - Transmission electron microscopy

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Nanoscale precipitates and phase transformations in a rapidly-solidified Fe-Pt-B amorphous alloy

Abstract

Keywords

ASJC Scopus subject areas

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