Influence of high-energy ball milling of precursor on the morphology and electrochemical performance of Li4Ti5O12–ball-milling time

The preparation, mechanical properties, grain size and thermal property of bulk nanocrystalline Cu (BNC-Cu) were investigated in this paper. BNC-Cu can be produced by in situ consolidation of pure Cu powder with high-energy ball milling at room temperature; the average grain sizes of Cu samples decreased with the increasing of ball milling time before 9 h because the grain refining velocity was bigger than the grain growing velocity in this stage. When the ball milling time was beyond 9 h, the average grain size reached a steady minimum value about 27.5 nm. The microhardness of BNC-Cu samples increased with the extending of ball milling time in the first 9 h because the dominating factor was the hardening effect caused by grain refinement and work hardening rather than softening in this stage. BNC-Cu gained its highest microhardness about 1.59GPa when the ball milling time reached 9 h. Subsequently, the microhardness of BNC-Cu slightly fluctuated around this value. Because there were numerous triple grain boundaries and the interaction among different crystal defects in BNC-Cu, BNC-Cu showed outstanding thermal stability when it was annealed in the range of 100°C to 400°C.

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Strengthening in CNT-Al Composites Produced by High-Energy Ball Milling

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.236-238.2336 ◽

2011 ◽

Vol 236-238 ◽

pp. 2336-2339 ◽

Cited By ~ 1

Author(s):

Xiao Fei Wang ◽

Xiao Lan Cai

Keyword(s):

Ball Milling ◽

Milling Time ◽

High Energy ◽

High Energy Ball Milling ◽

Matrix Composites ◽

The Matrix ◽

Energy Ball ◽

Al Matrix Composites ◽

Ball Milling Time

In this paper, carbon nanotubes (CNT)-reinforced aluminum (Al) matrix composites were fabricated by High-Energy Ball Milling, the objective was to investigate the evolvement of particle size, density and hardness of CNT-Al composites with increasing wt% CNT, and analyzed the micrographs of mixture powders at different milling time. The results showed that the addition of CNT can play a role of grinding aid to refine grain, improve the hardness and decrease the density, and CNT can be homogeneous dispersed in the matrix with increasing ball-milling time, it also showed that too much CNT was no help on hardness, this attributed to clustering of CNT, the proper addition of CNT was 2wt%, and the mixture powders could reached a state of equilibrium between fracturing and cold-welding at 75min.

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Effect of high-energy ball milling time on superconducting properties of MgB2with low purity boron powder

Superconductor Science and Technology ◽

10.1088/0953-2048/25/3/035018 ◽

2012 ◽

Vol 25 (3) ◽

pp. 035018 ◽

Cited By ~ 10

Author(s):

Chengduo Wang ◽

Yanwei Ma ◽

Xianping Zhang ◽

Dongliang Wang ◽

Zhaoshun Gao ◽

...

Keyword(s):

Ball Milling ◽

Milling Time ◽

High Energy ◽

High Energy Ball Milling ◽

Superconducting Properties ◽

Boron Powder ◽

Energy Ball ◽

Ball Milling Time

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Preparation of Cu-Zn Alloy by Different High Energy Ball Milling

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.412.259 ◽

2011 ◽

Vol 412 ◽

pp. 259-262

Author(s):

Kai Jun Wang ◽

Xiao Lan Cai ◽

Hua Wang ◽

Jin Hu ◽

Yun Feng Zhang

Keyword(s):

Ball Milling ◽

Milling Time ◽

High Energy ◽

High Energy Ball Milling ◽

Attrition Mill ◽

Phase Form ◽

Elemental Copper ◽

Energy Ball ◽

New Phase ◽

Zn Alloy

Cu-Zn alloy was prepared by high energy ball milling of elemental copper and zinc by the Simoloyer attrition mill, the different parameters such as milling time, ball-to-powder ratio and rotational speeds were analyzed. The results show that the different Cu-Zn alloy phase can be produced by different ball milling parameters, It has been found that milling time is highly significant to refining process, and the ratios of ball to powder are also benefited to the new phase form.

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Development of Ni/h-BN Self-Lubricating Composite Powder by High-Energy Ball Milling

Materials Science Forum ◽

10.4028/www.scientific.net/msf.869.277 ◽

2016 ◽

Vol 869 ◽

pp. 277-282

Author(s):

Moisés Luiz Parucker ◽

César Edil da Costa ◽

Viviane Lilian Soethe

Keyword(s):

Ball Milling ◽

Milling Time ◽

Solid Lubricants ◽

High Energy ◽

High Energy Ball Milling ◽

Second Phase ◽

Average Particle ◽

Composite Powders ◽

The Matrix ◽

Energy Ball

Solid lubricants have had good acceptance when used in problem areas where the conventional lubricants cannot be applied: under extreme temperatures, high charges and in chemically reactive environments. In case of materials manufactured by powder metallurgy, particles of solid lubricants powders can be easily incorporated to the matrix volume at the mixing stage. In operation, this kind of material provides a thin layer of lubricant that prevents direct contact between the surfaces. The present study aimed at incorporating particles of second phase lubricant (h-BN) into a matrix of nickel by high-energy ball milling in order to obtain a self-lubricating composite with homogeneous phase distribution of lubricant in the matrix. Mixtures with 10 vol.% of h-BN varying the milling time of 5, 10, 15 and 20 hours and their relationship ball/powder of 20:1 were performed. The effect of milling time on the morphology and microstructure of the powders was studied by X-ray diffraction, SEM and EDS. The composite powders showed reduction in average particle size with increasing milling time and the milling higher than 5 hours resulted in equiaxial particles and the formation of nickel boride.

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