Characteristic of Oxidation and Color Properties of Mechanically-Alloyed and Pulsed-Current-Sintered Ti-Si Alloy by Heat Treatment

2005 ◽  
Vol 24-25 ◽  
pp. 435-438
Author(s):  
Kimihiro Ozaki ◽  
Akihiro Matsumoto ◽  
Toshiyuki Nishio ◽  
Keizo Kobayashi
Keyword(s):  
Heat Treatment ◽  
Pulsed Current ◽  
Mechanically Alloyed ◽  
Color Properties

Intermetallic Effects on the Ductility of Sintered Aluminium

2008 ◽  
Vol 587-588 ◽  
pp. 380-384
Author(s):  
Jesus Cintas ◽  
José A. Rodríguez ◽  
Francicso Gomez Cuevas ◽  
José M. Gallardo
Keyword(s):  
Heat Treatment ◽  
Particle Size ◽  
Intermetallic Particle ◽  
Quantitative Metallography ◽  
Mechanically Alloyed ◽  
Aluminium Powder ◽  
Attrition Milling ◽  
Different Temperatures ◽  
Alloyed Aluminium ◽  
Milled Powders

Mechanically alloyed aluminium powder was prepared by attrition-milling for 10 hours in the presence of a wax. Milled powders were annealed in vacuum at different temperatures (500, 575, 600, 625 and 650°C). Compacts were consolidated starting from unannealed and from 600°Cannealed powders. Studies by SEM microfractography and quantitative metallography, to investigate the influence of Fe-Al intermetallics on compacts fracture, have been carried out. It is concluded that fracture takes place at regions where the area occupied by the intermetallics is high and intermetallics particles are big. Intermetallic particle size can be controlled by an appropriated heat treatment.

scholarly journals Influence of Preparation Process on Microstructure, Critical Current Density and Tc of MgB2/Fe/Cu Wires

2007 ◽  
Vol 546-549 ◽  
pp. 2031-2034
Author(s):  
Y.F. Wu ◽  
G. Yan ◽  
J.S. Li ◽  
Y. Feng ◽  
Shao Kai Chen ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Current Density ◽  
Rolling Process ◽  
High Energy ◽  
Transport Current ◽  
Post Heat Treatment ◽  
Mechanically Alloyed ◽  
Mgb2 Wires ◽  
Powder In Tube ◽  
Transport Current Density

The powder-in-tube MgB2 wires were prepared by high energy milling of Mg and B powder. The powder was not mechanically alloyed for 2h short milling time. However, the MgB2 grains in wires were very small (20~100nm) and resemble the dimple after post-heat treatment. The clear evidence for transcrystlline fracture was observed. It indicated that the grain connection was greatly improved and the fluxing pinning was significantly enhanced. Another point to view was no intermediate annealing during the whole rolling process. The influence of the post-heat treatment on the transport current density was studied. Despite the lower Tc of about 35K, the transport current density reached to 3×104A/cm2 at 15K and 3.5T for wires sintered at 700°C.

Effect of heat treatment on the properties of mechanically alloyed Al-based materials

2007 ◽  
Vol 49 (11-12) ◽  
pp. 574-577 ◽  
Author(s):  
S. A. Kotov ◽  
V. D. Andreeva ◽  
S. V. Ganin ◽  
B. M. Freidin ◽  
Yu. V. Kuz’mich
Keyword(s):  
Heat Treatment ◽  
Mechanically Alloyed

Intermetallic phases produced by the heat treatment of mechanically alloyed AlMo powders

1994 ◽  
Vol 185 (1-2) ◽  
pp. 77-86 ◽  
Author(s):  
M. Zdujić ◽  
D. Poleti ◽  
Lj. Karanović ◽  
K.F. Kobayashi ◽  
P.H. Shingu
Keyword(s):  
Heat Treatment ◽  
Intermetallic Phases ◽  
Mechanically Alloyed

scholarly journals Pulsed Current Sintering of Mechanically Alloyed Ni-Ti Powder

1999 ◽  
Vol 63 (9) ◽  
pp. 1161-1164 ◽  
Author(s):  
Keizo Kobayashi ◽  
Akihiro Matsumoto ◽  
Kimihiro Ozaki ◽  
Akira Sugiyama ◽  
Toshiyuki Nishio
Keyword(s):  
Pulsed Current ◽  
Mechanically Alloyed ◽  
Ti Powder

scholarly journals Near Net Shaping of Mechanically alloyed Fe-48at%Cr Powder by Pulsed Current Sintering Process.

2000 ◽  
Vol 47 (10) ◽  
pp. 1097-1101 ◽  
Author(s):  
Keizo Kobayashi ◽  
Akihiro Matsumoto ◽  
Toshiyuki Nishio ◽  
Kimihiro Ozaki ◽  
Akira Sugiyama
Keyword(s):  
Pulsed Current ◽  
Sintering Process ◽  
Mechanically Alloyed ◽  
Near Net Shaping ◽  
Net Shaping

Structural evolution during heat treatment of mechanically alloyed Al–Cu–Fe–(Si) alloys

2001 ◽  
Vol 304-306 ◽  
pp. 822-829 ◽  
Author(s):  
Ki Buem Kim ◽  
Suk Hwan Kim ◽  
Won Tae Kim ◽  
Do-Hyang Kim ◽  
Kyung-Tae Hong
Keyword(s):  
Heat Treatment ◽  
Structural Evolution ◽  
Mechanically Alloyed
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