thermodynamics of amorphization by ball milling

Mar 01, 1997 OSTI.GOV Journal Article: Amorphization mechanisms of NiZr{sub 2} by ball-milling

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A new method for the preparation of amorphous alloys is the mechanical alloying process. So far, three amorphization reaction types were observed when this technique is used. Which reaction type occurs depends on the local conditions during the milling, such as impact energy and local temperature just after an impact. Amorphous alloys prepared by milling following different reaction types are

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Dec 16, 2013 In the present study, mechanical alloying (MA) of Al75Fe25 elemental powders mixture was carried out in argon atmosphere, using a high energy attritor ball mill. The microstructure of the milled products at different stages of milling was characterized by X-ray diffraction (XRD), scanning electron

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Dec 29, 2016 Ball milling induced the formation of nanocrystalline and amorphization phase in Fe–25.68% Dy2O3 powder mixtures (mass fraction, %). The microstructure was investigated by using X-ray diffraction and transmission electron microscopy. The transformation of Dy2O3 from cubic to monoclinic crystal structure and then to the amorphization was observed during ball milling. A few Dy atoms were

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Oct 15, 2016 The microstructural evolution, thermodynamics, and kinetics of Mo (21 wt %) Tm 2 O 3 powder mixtures during ball milling were investigated using X-ray diffraction and transmission electron microscopy. Ball milling induced Tm 2 O 3 to be decomposed and then dissolved into Mo crystal. After 96 h of ball milling, Tm 2 O 3 was dissolved completely and the supersaturated nanocrystalline solid

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phases by ball milling, a new device has been built which allows to keep good vacuum during long time milling treatments. Preliminary results on NiloZr7 point to the crucial role of the efficiency factor in reaching full amorphization. Under good vacuum, continuous foils of amorphous material can be obtained

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The microstructural evolution, thermodynamics, and kinetics of Mo (21 wt %) Tm2O3 powder mixtures during ball milling were investigated using X-ray diffraction and transmission electron microscopy. Ball milling induced Tm2O3 to be decomposed and then dissolved into Mo crystal. After 96 h of ball milling, Tm2O3 was dissolved completely and the supersaturated nanocrystalline solid solution of Mo

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Some reviews on ball milling found in the literature also describe the different attempts to characterize the thermodynamics of amorphization via milling [2] and summarize the literature on

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Jul 04, 2012 Localized solid-state amorphization. Figure 2a is a typical low-magnification TEM image of a NC Ni sample after deformation, showing a crack-like damage zone with uniform light contrast. Similar

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Oct 15, 2016 PDF | The microstructural evolution, thermodynamics, and kinetics of Mo (21 wt %) Tm2O3 powder mixtures during ball milling were investigated using... | Find, read and cite all the research you

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ment of thermodynamics and kinetics of MgH 2 hydrogen storage performance. The most important techniques are adding catalysts and alloying materials to MgH 2, using methods to decrease the grain or particle size of MgH 2 in the range of nanometer, and amorphization of the structure [5]hanical milling for synthesizing nanostruc

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Thermodynamics and Kinetics of Amorphisation during Mechanical Alloying A.R.Yavari and P.J.Desre 43 Crystal to Non-equilibrium Phase Transition Induced by Ball-Milling E.Gaffet and L.Yousfi 51 Morphological Evolution and Amorphization of Ti/Cu and Ti/Al Powder Mixtures during Vibratory Ball Milling Y.H.Park, H.Hashimoto and R.Watanabe 59

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Atomic Disorder and Phase Transitions in Intermetallic Compounds by High-Energy Ball Milling ... Thermodynamics and Kinetics of Amorphisation during Mechanical Alloying p.43. Crystal to Non-Equilibrium Phase Transition Induced by Ball-Milling p.51. Morphological Evolution and Amorphization of Ti/Cu and Ti/Al Powder Mixtures during Vibratory

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Thermodynamic treatment of cyclic amorphization during ball milling. November 2006; ... Ball milling is a useful process for producing a variety of non-equilibrium and metastable phases from

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In this study, the amorphization of glipizide was systematically investigated through high-energy ball milling at different temperatures. The results of solid-state amorphization through milling indicated that glipizide underwent direct crystal-to-glass transformation at 15 and 25 C and crystal-to-glass-to-crystal conversion at 35 C; hence, milling time and temperature had significant effects on the amorphization of glipizide, which

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Oct 01, 1988 Physica B 153 (1988) 93-135 North-Holland, Amsterdam AMORPHIZATION BY BALL MILLING. A REVIEW A.W. WEEBER and H. BAKKER Natuurkundig Laboratoriurn der Universiteit van Amsterdam, Valckenierstraat 65, NL-IOI8 XE Amsterdam, The Netherlands Received 1 March 1988 A new method for the preparation of amorphous alloys is the mechanical alloying process

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Atomic Disorder and Phase Transitions in Intermetallic Compounds by High-Energy Ball Milling ... Thermodynamics and Kinetics of Amorphisation during Mechanical Alloying p.43. Crystal to Non-Equilibrium Phase Transition Induced by Ball-Milling p.51. Morphological Evolution and Amorphization of Ti/Cu and Ti/Al Powder Mixtures during Vibratory

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