scholarly journals Effect Of Different Mechanical Milling Processes On Morphology And Microstructural Changes Of Nano And Micron Al-Powders

2015 ◽  
Vol 60 (2) ◽  
pp. 1235-1239 ◽  
Author(s):  
H.-S. Kim ◽  
B. Madavali ◽  
T.-J. Eom ◽  
C.-M. Kim ◽  
J.-M. Koo ◽  
...  
Keyword(s):  
Ball Milling ◽  
Mechanical Milling ◽  
Structural Changes ◽  
Structural Evolution ◽  
High Energy ◽  
Milling Process ◽  
High Energy Ball Milling ◽  
Microstructural Changes ◽  
Al Nanoparticles ◽  
Energy Ball

Abstract In this research, effect of the various mechanical milling process on morphology and microstructural changes of nano and micron Al-powders was studied. The milling of Al-powders was performed by both high energy and low energy ball milling process. The influence of milling (pulverizing) energy on the structural changes of Al-powders was studied. Al-nanoparticles were agglomerated during the MA and its size was increased with increasing milling while micron Al-powder gets flattened shape during high energy ball milling due to severe plastic deformation. Meanwhile, structural evolution during high energy ball milling of the nano powder occurred faster than that of the micron powder. A slight shift in the position of X-ray diffraction peaks was observed in nano Al-powders but it was un-altered in macro Al-powders. The variation in lattice parameters was observed only for nano Al powders during the high energy ball milling due to lattice distortion.

Structural Evolution of Ti-Fe-Si-B Alloys Produced by High-Energy Ball Milling and Sintering

2014 ◽  
Vol 802 ◽  
pp. 3-8
Author(s):  
Wladimir Leite Pereira ◽  
Isadora Rossi Bertoli ◽  
Juliana de Aquino Franzé ◽  
Alfeu Saraiva Ramos ◽  
Neide Aparecida Mariano ◽  
...  
Keyword(s):  
Ball Milling ◽  
Raw Materials ◽  
Structural Evolution ◽  
High Energy ◽  
Milling Process ◽  
High Energy Ball Milling ◽  
Powder Mixtures ◽  
Energy Ball ◽  
Sintered Alloys

This proposal aims at structural characterization of Ti-Fe-Si-B alloys produced by high-energy ball milling and subsequent sintering. In this study, quaternary alloys were prepared from raw materials of high purity: Ti (99.9 wt-%), Fe (99.8 wt-%), Si (99.999 wt-%) and B (99.5 wt-%). The milling process of the Ti-2Fe-22Si-11B and Ti-7Fe-22Si-11B (at-%) powders was carried out in a planetary Fritsch P-5 ball mill. Subsequently, the Ti-Fe-Si-B powders milled for 600 min were sintered (1100 ° C for 240 min) under vacuum to obtain equilibrium structures. The characterization of as-milled powders and sintered alloys was performed by means of X-ray diffraction, scanning electron microscopy, and electron dispersive spectrometry. Extended solid solutions were formed during the initial milling times while that the brittle Ti5Si3 phase was formed for longer milling times in both the quaternary powder mixtures. This fact contributed for reducing the particle sizes. Homogeneous samples containing a small amount of pore were obtained after sintering at 1100°C for 4h. Results have indicated that the iron addition favored the formation of different binary phases of the Ti-Si system, and the formation of the Ti6Si2B compound was inhibited from the Ti-Fe-Si-B powder mixtures.

Carbon tubes produced during high-energy ball milling process

2006 ◽  
Vol 54 (1) ◽  
pp. 93-97 ◽  
Author(s):  
J.L. Li ◽  
L.J. Wang ◽  
G.Z. Bai ◽  
W. Jiang
Keyword(s):  
Ball Milling ◽  
High Energy ◽  
Milling Process ◽  
High Energy Ball Milling ◽  
Ball Milling Process ◽  
Energy Ball

Pb(ZrxTi1−x)O3 ceramics via reactive sintering of partially reacted mixture produced by a high-energy ball milling process

2001 ◽  
Vol 16 (6) ◽  
pp. 1636-1643 ◽  
Author(s):  
L. B. Kong ◽  
J. Ma ◽  
T. S. Zhang ◽  
W. Zhu ◽  
O. K. Tan
Keyword(s):  
Ball Milling ◽  
Ferroelectric Properties ◽  
High Energy ◽  
Milling Process ◽  
High Energy Ball Milling ◽  
Sintering Behavior ◽  
Reactive Sintering ◽  
Pzt Ceramics ◽  
Ball Milling Process ◽  
Energy Ball

Partially reacted mixtures of Pb(ZrxTi1−x)O3 and its corresponding starting oxide components were obtained by a high-energy ball milling process. The partially reacted powders were characterized by x-ray diffraction and scanning electron microscopy techniques. The sintering behavior of the milled mixtures has demonstrated a distinct volumetric expansion before the densification of the samples, which clearly shows the occurrence of a reactive sintering process of the partially reacted powders. Such process requires a lower densification temperature as compared with the PZT powders produced by the conventional solid-state reaction process. PZT ceramics were found to form directly from the partially reacted powders sintered at 900–1200 °C. The dielectric and ferroelectric properties of the PZT ceramics as a function of sintering temperature and milling time were also studied and discussed.

Structural evolution of B2-NiAl synthesized by high-energy ball milling

2012 ◽  
Vol 48 (1) ◽  
pp. 265-272 ◽  
Author(s):  
H. Ruiz-Luna ◽  
J. M. Alvarado-Orozco ◽  
L. A. Cáceres-Díaz ◽  
I. López-Báez ◽  
J. Moreno-Palmerín ◽  
...  
Keyword(s):  
Ball Milling ◽  
Structural Evolution ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Energy Ball

Nanocrystalline/nanoparticle ZnO synthesized by high energy ball milling process

2012 ◽  
Vol 86 ◽  
pp. 122-124 ◽  
Author(s):  
Sajjad Amirkhanlou ◽  
Mostafa Ketabchi ◽  
Nader Parvin
Keyword(s):  
Ball Milling ◽  
High Energy ◽  
Milling Process ◽  
High Energy Ball Milling ◽  
Ball Milling Process ◽  
Energy Ball
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