Phase evolution and microstructure characteristics of Mo-based Tb 2 O 3 -Dy 2 O 3 composites synthesized by ball milling and sintering

2018 ◽  
Vol 29 (2) ◽  
pp. 359-366 ◽  
Author(s):  
Yizhen Wu ◽  
Guang Ran ◽  
Wei Zhou ◽  
Dong Lv ◽  
Chao Ye ◽  
...  
Keyword(s):  
Ball Milling ◽  
Phase Evolution ◽  
Microstructure Characteristics

Non-Equilibrium Formation Of Silicon Nitride During Both Ball Milling And Ion Bombardment

1997 ◽  
Vol 481 ◽  
Author(s):  
Z. L. Li ◽  
J. S. Williams ◽  
D. J. Llewellyn ◽  
J. Wong-Leung ◽  
M. Giersig ◽  
...  
Keyword(s):  
Ball Milling ◽  
Analytical Techniques ◽  
Ion Bombardment ◽  
Phase Evolution ◽  
X Ray Diffraction ◽  
Combustion Analysis ◽  
X Ray ◽  
Transmission Electron ◽  
Nitride Formation ◽  
Amorphous Si

ABSTRACTPhase evolution during ball milling of Si in NH3 gas and during subsequent annealing has been studied and compared with nitride formation during ion bombardment of Si. X-ray diffraction, differential thermal analysis, Rutherford backscattering and channeling, combustion analysis and transmission electron microscopy have been used as analytical techniques. Results have shown that an amorphous SixNy(Fe) phase forms during milling which transforms into α-Si3N4 and FeSi2 on annealing. During ion bombardment, slightly N-rich Si3N4 is formed but it is mostly crystalline at temperatures between 150 and 450°C.

scholarly journals Microstructural Evolution, Thermodynamics and Kinetics of Mo-Tm2O3 Powder Mixtures during Ball Milling

2016 ◽  
Author(s):  
Yong Luo ◽  
Guang Ran ◽  
Nanjun Chen ◽  
Qiang Shen ◽  
Yaoli Zhang
Keyword(s):  
Solid Solution ◽  
Ball Milling ◽  
Microstructural Evolution ◽  
Driving Force ◽  
Phase Evolution ◽  
Heat Of Mixing ◽  
Powder Mixtures ◽  
Thermodynamics And Kinetics ◽  
Transmission Electron ◽  
Kinetics Of

The microstructural evolution, thermodynamics and kinetics of Mo-21%Tm2O3 (mass fraction, %) 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. The supersaturated nanocrystalline solid solution of Mo (Tm, O) was obtained after 96 h of ball milling. The elements of Mo, Tm and O were distributed uniformly in the ball-milled particles. Based on the semi-experimental theory of Miedema, a thermodynamic model was developed to calculate the driving force of phase evolution. There was no chemical driving force to form a crystal solid solution of Tm atoms in Mo crystal or an amorphous phase because the Gibbs free energy for both processes was higher than zero. For Mo-21%Tm2O3, it was mechanical work, not negative heat of mixing, that provided the driving force to form supersaturated nanocrystalline Mo (Tm, O) solid solution.

Phase evolution during high energy ball milling of immiscible Nb–Zr alloys

2015 ◽  
Vol 26 (2) ◽  
pp. 385-391 ◽  
Author(s):  
N. Al-Aqeeli ◽  
M.A. Hussein ◽  
C. Suryanarayana
Keyword(s):  
Ball Milling ◽  
Phase Evolution ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Energy Ball ◽  
Zr Alloys

Phase Evolution During Ball Milling of Al In NH3 and Subsequent Annealing

1997 ◽  
Vol 481 ◽  
Author(s):  
J. I Nikolov ◽  
J. S. Williams ◽  
D. J. Llewellyn ◽  
A. Calka
Keyword(s):  
Electron Microscopy ◽  
Ball Milling ◽  
Hollow Spheres ◽  
Analytical Techniques ◽  
Phase Evolution ◽  
X Ray Diffraction ◽  
Combustion Analysis ◽  
X Ray ◽  
Transmission Electron ◽  
O Phase

ABSTRACTPhase evolution during ball milling of Al in both N2 and NH3 gas has been compared and the annealing behaviour studied in some detail. X-ray diffraction, differential thermal analysis, combustion analysis and scanning and transmission electron microscopy have been used as analytical techniques. Results have shown that a nitride is not formed in N2 but that Al forms into many small, hollow spheres during milling. In contrast, milling in NH3 results in an amorphous AlxNy(O) phase which transforms into crystalline AIN and A12O3 on annealing to 1000°C.

Phase evolution and magnetic behaviour of Cu–Ni–Co–Fe quaternary alloys synthesized by ball milling

2009 ◽  
Vol 116 (2-3) ◽  
pp. 358-362 ◽  
Author(s):  
B.N. Mondal ◽  
A. Basumallick ◽  
D.N. Nath ◽  
P.P. Chattopadhyay
Keyword(s):  
Ball Milling ◽  
Phase Evolution ◽  
Magnetic Behaviour ◽  
Quaternary Alloys

Phase evolution of Fe 2 O 3 nanoparticle during high energy ball milling

2001 ◽  
Vol 44 (8-9) ◽  
pp. 2023-2026 ◽  
Author(s):  
Jai-Sung Lee ◽  
Chang-Soo Lee ◽  
Sung-Tag Oh ◽  
Jung-Gi Kim
Keyword(s):  
Ball Milling ◽  
Phase Evolution ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Energy Ball
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