Different Pathways of Phase Transition in a V–Si System Driven by Mechanical Alloying

Solid state reactions induced by mechanical alloying of an elemental powder mixture of V and Si with a composition of V 75Si 25 were investigated using X-ray diffraction and scanning and transmission electron microscopy. It was found that the phase transitions in this system are closely related to t...

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Bibliographic Details
Published inMaterials research bulletin Vol. 33; no. 4; pp. 539 - 545
Main Authors Liu, L, Lu, L, Lai, M.O, Magini, M, Fei, G.T, Zhang, L.D
Format Journal Article
LanguageEnglish
Published London Elsevier Ltd 01.04.1998
Amsterdam Elsevier Science
Subjects
A. intermetallic compounds
Applied sciences
C. electron microscopy
C. X-ray diffraction
Condensed matter: structure, mechanical and thermal properties
Constant-composition solid-solid phase transformations: polymorphic, massive, and order-disorder
Cross-disciplinary physics: materials science; rheology
D. phase transitions
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Materials science
Metals. Metallurgy
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Solid-solid transitions
Specific phase transitions
A. intermetallic compounds
D. phase transitions
C. electron microscopy
C. X-ray diffraction
Intermetallic compounds
Phase transformations
Amorphization
Vanadium base alloys
XRD
Experimental study
Mechanical alloying
Binary alloys
Silicon alloys
Solid state reaction
SEM
Microstructure
Activation energy
TEM
Nanocrystal
Transition element alloys
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Summary:Solid state reactions induced by mechanical alloying of an elemental powder mixture of V and Si with a composition of V 75Si 25 were investigated using X-ray diffraction and scanning and transmission electron microscopy. It was found that the phase transitions in this system are closely related to the milling intensity. High-energy milling mainly causes the formation of intermetallic compounds, whereas low-energy milling leads to amorphization. The thermodynamics and kinetics related to the different pathways of V–Si phase transition are briefly discussed in this paper. The effect of air contamination on phase transition is also addressed.
ISSN:0025-5408
1873-4227
DOI:10.1016/S0025-5408(97)00238-9