Effect of Addition of Process Control Agent (PCA) on the Nanocrystalline Behavior of Elemental Silver during High Energy Milling

2005 ◽  
Vol 160 (1-4) ◽  
pp. 173-180 ◽  
Author(s):  
P. B. Joshi ◽  
G. R. Marathe ◽  
Arun Pratap ◽  
Vinod Kurup
Keyword(s):  
Process Control ◽  
High Energy ◽  
Control Agent ◽  
Process Control Agent ◽  
High Energy Milling ◽  
Elemental Silver

ROLE OF PROCESS CONTROL AGENT ON MECHANICAL ALLOYING OF NANO STRUCTURED TiAl-BASED ALLOY

2008 ◽  
Vol 22 (18n19) ◽  
pp. 2933-2938 ◽  
Author(s):  
H. BAHMANPOUR ◽  
S. HESHMATI-MANESH
Keyword(s):  
Process Control ◽  
Stearic Acid ◽  
Milled Powder ◽  
High Energy ◽  
Control Agent ◽  
X Ray Diffraction ◽  
Process Control Agent ◽  
Crystallite Sizes ◽  
Energy Ball ◽  
Milled Powders

High energy ball milling was performed on a mixture of titanium and aluminum elemental powders with a composition of Ti -48(at.%) Al . Stearic acid was added to this powder mixture as a process control agent (PCA) to study its effect on the microstructure evolution and crystallite size of the milled powder after various milling times. Phase compositions and morphology of the milled powders were evaluated using X-ray diffraction and scanning electron microscopy. Crystallite sizes of milled powders were determined by Cauchy-Gaussian approach using XRD profiles. It was shown that addition of 1wt.% of stearic acid not only minimizes the adhesion of milling product to the vial and balls, but also reduces its crystallite sizes. It has also a marked effect on the morphology of the final product.

scholarly journals Influence of the Oxide and Ethanol Surface Layer on Phase Transformation of Al-Based Nanocomposite Powders under High-Energy Milling

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1305 ◽  
Author(s):  
Dora Janovszky
Keyword(s):  
Particle Size ◽  
Milling Time ◽  
High Energy ◽  
Amorphous Structure ◽  
Control Agent ◽  
Dry Milling ◽  
Process Control Agent ◽  
Composite Powders ◽  
High Energy Milling ◽  
Nanocomposite Powders

Pure Al particles reinforced with amorphous-nanocrystalline Cu36Zr48Ag8Al8 particles composite powders were prepared by high-energy milling without and with ethanol. The mechanical milling procedures were compared so that in the case of dry milling the particle size increased owing to cold welding, but the crystallite size decreased below 113 nm. The amorphous phase disappeared and was not developed until 30 h of milling time. Using ethanol as a process control agent, the particle size did not increase, while the amorphous fraction increased to 15 wt.%. Ethanol decomposed to carbon dioxide, water, and ethane. Its addition was necessary to increase the amount of the amorphous structure.

An Investigation of the use of Stearic Acid as a Process Control Agent in High Energy Ball Milling of Nb-Al and Ni-Al Powder Mixtures

2003 ◽  
Vol 416-418 ◽  
pp. 144-149 ◽  
Author(s):  
Cláudio José da Rocha ◽  
Ricardo Mendes Leal Neto ◽  
Valéria S. Gonçalves ◽  
L.L. Carvalho ◽  
Francisco Ambrozio Filho
Keyword(s):  
Process Control ◽  
Stearic Acid ◽  
Ball Milling ◽  
High Energy ◽  
Control Agent ◽  
High Energy Ball Milling ◽  
Process Control Agent ◽  
Powder Mixtures ◽  
Energy Ball ◽  
Al Powder

Effect of process control agent on alloying and mechanical behavior of L21 phase Ni–Ti–Al alloys

2019 ◽  
Vol 740-741 ◽  
pp. 130-136 ◽  
Author(s):  
Jun Shi ◽  
Aofeng Zheng ◽  
Zehui Lin ◽  
Rong Chen ◽  
Jugong Zheng ◽  
...  
Keyword(s):  
Process Control ◽  
Mechanical Behavior ◽  
Control Agent ◽  
Al Alloys ◽  
Process Control Agent
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