scholarly journals Pulsed Current Activated Consolidation of Nanostructured Fe3Al and Its Mechanical Property

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Tae-Wan Kim ◽  
In-Yong Ko ◽  
Jung-Mann Doh ◽  
Jin-Kook Yoon ◽  
In-Jin Shon

A nanopowder ofFe3Alwas synthesized from 3Fe and Al by high-energy ball milling. A dense nanostructuredFe3Alwas consolidated by pulsed current activated sintering method within 2 minutes from mechanically synthesized powders ofFe3Aland horizontally milled powders of 3Fe+Al. The grain size, sintering behavior, and hardness ofFe3Alsintered from horizontally milled 3Fe+Al powders and high-energy ball milledFe3Alpowder were compared.

2015 ◽  
Vol 44 (43) ◽  
pp. 18870-18881 ◽  
Author(s):  
G. Štefanić ◽  
S. Krehula ◽  
I. Štefanić

The impact of grain size on the source and the degree of contamination.


2001 ◽  
Vol 16 (6) ◽  
pp. 1636-1643 ◽  
Author(s):  
L. B. Kong ◽  
J. Ma ◽  
T. S. Zhang ◽  
W. Zhu ◽  
O. K. Tan

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.


2013 ◽  
Vol 20 (4) ◽  
pp. 275-279 ◽  
Author(s):  
Eun-Kwang Park ◽  
Sung-Mo Hong ◽  
Jin-Ju Park ◽  
Min-Ku Lee ◽  
Chang-Kyu Rhee ◽  
...  

2007 ◽  
Vol 33 (7) ◽  
pp. 1283-1286 ◽  
Author(s):  
Jae Shin Lee ◽  
Mun Seok Choi ◽  
Nguyen Viet Hung ◽  
Young Sun Kim ◽  
Ill Won Kim ◽  
...  

2010 ◽  
Vol 123-125 ◽  
pp. 197-200 ◽  
Author(s):  
In Jin Shon ◽  
Hyun Su Kang ◽  
Dong Mok Lee ◽  
Kwon Il Na ◽  
In Yong Ko

Nanopowders of Cr and Al2O3 was fabricated from CrO3 and 2Al by high energy ball milling. Dense nanocrystalline Cr-Al2O3 composite was consolidated by pulsed current activated sintering (PCAS) method within 1 min from mechanically alloyed powders. Highly dense Cr-Al2O3 with relative density of up to 99% was produced under simultaneous application of a 80 MPa pressure and the pulsed current. The average grain size and mechanical properties of the composite were investigated.


2012 ◽  
Vol 38 (4) ◽  
pp. 2627-2632 ◽  
Author(s):  
A. Eskandari ◽  
M. Aminzare ◽  
Z. Razavi hesabi ◽  
S.H. Aboutalebi ◽  
S.K. Sadrnezhaad

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