The ball to powder ratio (BPR) dependent morphology and microstructure of tungsten powder refined by ball milling

2018 ◽  
Vol 339 ◽  
pp. 256-263 ◽  
Author(s):  
Z.M. Wu ◽  
Y.X. Liang ◽  
Y. Fan ◽  
P.P. Wang ◽  
J.L. Du ◽  
...  
Keyword(s):  
Ball Milling ◽  
Tungsten Powder

Thermodynamic Analysis of the Reduction of WO3 by Al Powder

2012 ◽  
Vol 581-582 ◽  
pp. 616-619
Author(s):  
Lian Ping Chen ◽  
Yuan Hong Gao ◽  
Bai Tao Su
Keyword(s):  
Gibbs Energy ◽  
Ball Milling ◽  
Thermodynamic Analysis ◽  
Room Temperature ◽  
Tungsten Powder ◽  
Tungsten Oxides ◽  
Al Powder

Hydrogen is widely used to prepare tungsten from tungsten oxides. Such a gas is combustible and strict measures must be taken. However, assisted by Mg or Li3N, tungsten can be prepared through the ball milling at room temperature. The reduction of WO3by Al powder is investigated thermodynamically. Simulations on the loss of Gibbs energy of these hypothetic reactions reveal that the reduction of WO3and WO2(OH)2(or H2WO4) is feasible when Al powder is used; and it is more difficult to generate the intermediate tungsten oxides such as WO2, WO2.72and WO2.9. In addition, it is better to prepare tungsten powder in vacuum containers in view of economy.

scholarly journals Effect of Ball Milling Parameters on the Refinement of Tungsten Powder

Metals ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 281 ◽  
Author(s):  
Zaoming Wu ◽  
Yanxia Liang ◽  
Engang Fu ◽  
Jinlong Du ◽  
Peipei Wang ◽  
...  
Keyword(s):  
Ball Milling ◽  
Tungsten Powder ◽  
Milling Parameters

BALL MILLING OF INTERMETALLIC PHASES IN THE Nb-Al SYSTEM

1990 ◽  
Vol 51 (C4) ◽  
pp. C4-169-C4-174 ◽  
Author(s):  
M. OEHRING ◽  
R. BORMANN
Keyword(s):  
Ball Milling ◽  
Intermetallic Phases
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