Effect of Ball Size and Ball to Powder Ratio Variation on Crystallite Size and Formation of Nanocrystalline Materials in Planetary Ball Mill

2011 ◽  
Author(s):  
S. M. Salili ◽  
A. Ataie ◽  
Z. Sadighi ◽  
Muhammed Hasan Aslan ◽  
Ahmet Yayuz Oral ◽  
...  
Keyword(s):  
Crystallite Size ◽  
Nanocrystalline Materials ◽  
Ball Mill ◽  
Planetary Ball Mill ◽  
Ball Size ◽  
Ratio Variation

scholarly journals Synthesis of dense nanometric MoSi2 through mechanical and field activation

2001 ◽  
Vol 16 (5) ◽  
pp. 1439-1448 ◽  
Author(s):  
R. Orrù ◽  
J. Woolman ◽  
G. Cao ◽  
Z. A. Munir
Keyword(s):  
Crystallite Size ◽  
Electric Current ◽  
Ball Mill ◽  
Planetary Ball Mill ◽  
Plasma Synthesis ◽  
Product Phase ◽  
Spark Plasma ◽  
Spark Plasma Synthesis ◽  
Nanometric Size ◽  
Milled Powders

The effect of mechanical and field activation on the synthesis of dense nanometric MoSi2 was investigated. Powders of Mo and Si, milled separately or comilled in a planetary ball mill, were reacted in a spark plasma synthesis (SPS) apparatus under different electric current conditions. Milled powders reacted faster and required less current than unmilled powders. Mixtures of powders which were milled separately (to nanometric size) reacted in the SPS to produce micrometric α–MoSi2. Similar results were obtained for samples comilled to produce nanometric reactants which did not contain detectable amounts of the product phase. When products form during milling, they contain both the α and β modifications of MoSi2. The product after the SPS reaction was nanometric MoSi2 with a crystallite size of 140 nm.

scholarly journals Effect of Ball Size on Nanostructured Copper-tungsten Carbide Composite Prepared by Mechanical Alloying

2013 ◽  
Vol 1 (2) ◽  
pp. 31-34
Author(s):  
Mahani Yusoff ◽  
Zuhailawati H
Keyword(s):  
Mechanical Alloying ◽  
Tungsten Carbide ◽  
Crystallite Size ◽  
Impact Energy ◽  
Ball Mill ◽  
Collision Frequency ◽  
Ball Size ◽  
Carbide Composite ◽  
Tungsten Carbide Composite ◽  
Nanostructured Copper

In this study, nanostructured copper tungsten carbide composite was produced by mechanical alloying. Mechanical alloying was carried out by milling of copper (Cu), tungsten (W) and graphite mixture at 40 h with milling speed of 400 rpm in planetary ball mill using two different ball sizes. The crystallite size of the powder milled with 10 mm ball is smaller than 20 mm ball due to higher collision frequency. Lower expansion of Cu lattice was found for the powder milled with 20 mm ball than that of 10 mm ball. The composite obtain by milling with 20 mm ball had produced greater impact energy that facilitated the formation of tungsten carbide (WC).

Influence of ball size distribution on grinding effect in horizontal planetary ball mill

2014 ◽  
Vol 25 (3) ◽  
pp. 983-990 ◽  
Author(s):  
Jiaguan Zhang ◽  
Yang Bai ◽  
Hai Dong ◽  
Qiong Wu ◽  
Xuchu Ye
Keyword(s):  
Size Distribution ◽  
Ball Mill ◽  
Planetary Ball Mill ◽  
Ball Size

Fast, solvent-free and highly enantioselective fluorination of β-keto esters catalyzed by chiral copper complexes in a ball mill

2017 ◽  
Vol 19 (7) ◽  
pp. 1674-1677 ◽  
Author(s):  
Yifeng Wang ◽  
Haojiang Wang ◽  
Yidong Jiang ◽  
Cheng Zhang ◽  
Juanjuan Shao ◽  
...  
Keyword(s):  
Ball Mill ◽  
Copper Complexes ◽  
Solvent Free ◽  
Planetary Ball Mill ◽  
Keto Esters ◽  
Solvent Free Conditions

A fast and highly enantioselective fluorination of β-keto esters catalyzed by diphenylamine linked bis(oxazoline)-Cu(OTf)2 complexes under solvent-free conditions has been developed using a planetary ball mill.

scholarly journals Production of Ultrafine Particles by Continuous Planetary Ball Mill.

1991 ◽  
Vol 38 (2) ◽  
pp. 66-69
Author(s):  
Kantaro KANEKO ◽  
Mutsuhiro KAWASHIMA
Keyword(s):  
Ball Mill ◽  
Ultrafine Particles ◽  
Planetary Ball Mill

scholarly journals Analysis of early-stage sintering mechanisms of mechanically activated BaTiO3

2006 ◽  
Vol 38 (3) ◽  
pp. 239-244 ◽  
Author(s):  
M.V. Nikolic ◽  
V.P. Pavlovic ◽  
V.B. Pavlovic ◽  
M.M. Ristic
Keyword(s):  
Barium Titanate ◽  
Temperature Interval ◽  
Ball Mill ◽  
Early Stage ◽  
Planetary Ball Mill ◽  
Heating Rates ◽  
Barium Titanate Powder ◽  
Powder Samples ◽  
Sintering Mechanisms

Barium-titanate powder was mechanically activated in a planetary-ball mill for 60 and 120 minutes. Non-isothermal sintering of non-activated and activated powder samples was investigated using a dilatometer in the temperature interval from room to 1380oC with three different heating rates (10, 20 and 30oC/min). Early-stage sintering mechanisms for all three types of samples were analyzed, showing significant differences between the non-activated and mechanically activated samples.

Antistatic Composite Coаtings on the Basis of Powder Paints

2014 ◽  
Vol 1040 ◽  
pp. 3-7
Author(s):  
Sergey Panin ◽  
Sergey Y. Yazykov ◽  
Boris Ovechkin
Keyword(s):  
Magnesium Alloy ◽  
Functional Properties ◽  
Powder Mixture ◽  
Ball Mill ◽  
Outer Space ◽  
Planetary Ball Mill ◽  
Static Electricity ◽  
Protective Function ◽  
Electrostatic Deposition ◽  
Space Conditions

For operating under outer space conditions besides providing originally specified protective function, coating should often ensure accomplishment of functional properties, for instance conductivity of electric current. The solution of this problem can be reached by adding powder fillers with specified functional properties into powder paint. The paper deals with development of technique for formation of protective conducting coatings by filling powder paints and treatment in planetary ball mill. For protection of magnesium alloy shells the technique is offered which combines formation of the oxidized sublayer, introduction of electroconductive filler, treatment of the powder mixture in the planetary ball mill and electrostatic deposition of sifted mixture of definite dispersion. This allows sinking of static electricity from cabinets of the equipment for the space-crafts applications in conditions of the outer space.

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