Thermodynamic analysis of nanocrystalline and amorphous phase formation in Nb–Al system during mechanical alloying

Mössbauer spectrometry and x-ray diffractometry were used to characterize the microstructural changes that occurred during the mechanical alloying of Fe and V powders, After 3 h of essentially no interatomic intermixing, an Fe–V alloy began to form. At first the chemical composition of this alloy was highly inhomogeneous, having large variations over distance scales of less than 100 Å. After about 24 h of ball milling, the alloy homogenized and then became at least partly amorphous.

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Microstructural evolution and amorphous phase formation of Fe42Ni28Zr8Ta2B10C10 alloy produced by mechanical alloying

Powder Technology ◽

10.1016/j.powtec.2012.08.035 ◽

2013 ◽

Vol 233 ◽

pp. 255-260 ◽

Cited By ~ 11

Author(s):

M.A. Nowroozi ◽

K. Janghorban ◽

B. Hashemi ◽

A.H. Taghvaei ◽

S. Maleksaeedi

Keyword(s):

Mechanical Alloying ◽

Amorphous Phase ◽

Phase Formation ◽

Microstructural Evolution ◽

Amorphous Phase Formation

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Effects of Milling Variables in Amorphous Phase Formation of Fe78Si9B13 Alloy Produced by Mechanical Alloying

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.876.19 ◽

2021 ◽

Vol 876 ◽

pp. 19-24

Author(s):

Raquel Astacio López ◽

Rosa M. Aranda Louvier ◽

Petr Urban ◽

Fátima Ternero Fernández ◽

Juan Manuel Montes Martos

Keyword(s):

Electron Microscopy ◽

Mechanical Alloying ◽

Amorphous Phase ◽

Milling Time ◽

Morphological Evolution ◽

X Ray Diffraction ◽

Transmission Electron ◽

Nanocrystalline And Amorphous ◽

Gas Atmosphere ◽

Amorphous Phase Formation

In this study, amorphous Fe78Si9B13 alloy was successfully synthesized by mechanical alloying (MA) of pure elemental powders which were milled under an argon gas atmosphere. Effects of milling time on the phase transformation, microstructure and morphological evolution were studied by X-ray diffraction (XRD), laser diffraction (Granulometry), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Results showed that by increasing the milling time, the nanocrystalline and amorphous phase content increases and alloys with good properties are obtained at 100 h of milling.

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Amorphous Phase Formation in the Fe-W System Induced by Mechanical Alloying

Materials Science Forum ◽

10.4028/www.scientific.net/msf.88-90.391 ◽

1992 ◽

Vol 88-90 ◽

pp. 391-398 ◽

Cited By ~ 6

Author(s):

T.D. Shen ◽

K.Y. Wang ◽

M.X. Quan ◽

J.T. Wang

Keyword(s):

Mechanical Alloying ◽

Amorphous Phase ◽

Phase Formation ◽

Amorphous Phase Formation

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Influence of mechanical alloying conditions on amorphous phase formation in Fe67B33

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2012.10.118 ◽

2014 ◽

Vol 586 ◽

pp. S73-S77 ◽

Cited By ~ 6

Author(s):

T.A. Sviridova ◽

E.V. Shelekhov ◽

V.I. Bazilyan ◽

T.R. Chueva ◽

N.V. Shvyndina ◽

...

Keyword(s):

Mechanical Alloying ◽

Amorphous Phase ◽

Phase Formation ◽

Amorphous Phase Formation

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Development of a Thermodynamic Criterion to Predict the Alloy Compositions for Amorphous and Nanocrystalline Phase Formation during Mechanical Alloying

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.279.147 ◽

2008 ◽

Vol 279 ◽

pp. 147-151 ◽

Cited By ~ 2

Author(s):

N. Das ◽

S.K. Pabi ◽

U.D. Kulkarni ◽

B.S. Murty ◽

G.K. Dey

Keyword(s):

Solid Solution ◽

Mechanical Alloying ◽

Amorphous Phase ◽

Phase Formation ◽

Nanocrystalline Phase ◽

Thermodynamic Criterion ◽

Enthalpy Difference ◽

Constituent Elements ◽

Relationship Of ◽

Amorphous Phase Formation

Recent studies indicate that the existing criteria for amorphous phase formation are not precise. This study emphasizes that the extent of deviation from the linear relationship of the chemical contribution to enthalpy of the solid solution with the enthalpy difference between the amorphous phase and the constituent elements is a measure of tendency to bypass amorphous phase formation. Mechanical alloying experiments on a number of compositions in Al-Ni-Ti system showed that the compositions, not following the aforesaid relation, yield partial or no amorphization.

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