Results 251 to 260 of about 165,045 (291)

The Effect of Reversing Current on the Properties of Copper and Electrolytic Copper Powder. I. The Morphology of Powder Particles

Materials Science Forum, 2004
The selective dissolution of copper dendrites during electrodeposition by reversing current was discussed and the effects on the morphology of copper powder particles were elucidated.
Pavlović, MG, Popov, Konstantin I., Pavlović, Ljubica, Ivanović, Evica, Jović, VD   +4 more
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Facile Synthesis of Flake Copper Powder Loaded With Silver Particles

Applied Mechanics and Materials, 2011
A fast and facile wet chemistry method has been developed for preparing monodispersed silver coated copper composite particles. Copper powder is coated using a solution containing [Ag (NH3)] +. The effect of the copper particle size distribution, the concentrations of [Ag (NH3)] + on composite particles conductivity were investigated.
Xiao Feng Tian, Wei Ke Zhang
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Microwave Heating of Pure Copper Powder with Varying Particle Size and Porosity

Journal of Microwave Power and Electromagnetic Energy, 2008
In recent years, microwave processing of metal/alloy powders have gained considerable potential in the field of material synthesis. Microwave heating is recognized for its various advantages such as: time and energy saving, rapid heating rates, considerably reduced processing cycle time and temperature, fine microstructures and improved mechanical ...
Avijit, Mondal, Dinesh, Agrawal, Anish, Upadhyaya   +2 more
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Dependence of Green Strength on Contact Area Between Powder Particles for Spherical Copper Powder Compacts

Powder Metallurgy, 1985
Model 2 The geometrical considerations used here are, in principle, similar to those of Model 1, with respect to the contacting pairs of spheres considered in the densification process. Now, considering the two contacting spheres shown in Fig. 11 (see Appendix 1), the contact area will be increased necessary for evaluating the experimentally obtained ...
In-Hyung Moon, Jin-Sung Choi
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Thermal Transport in the Copper Powders with Nanometer and Micrometer Particles

Advanced Materials Research, 2010
This paper investigates effects of particle size on heat transfer in copper powders. The understanding for thermal properties of the powder is advantageous to the advancement of the processing technologies such as laser cladding, laser sintering, powder metallurgy and its other applications.
Ching Yen Ho, Yu Hsiang Tsai, Feng Ming Sui   +2 more
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The Effect of Time of Powder Removal on Powder Particle Size and Shape Copper Powder Produced by Electrolysis Method

Materials Science Forum, 2011
In this study, electrolyze unit, which is used for the production of metal powders, was designed and produced. The production of powder was carried out by using different parameter times of powder removal (5, 10, 20, 30 and 40 min.). The effect of time of powder removal on powder particle size and shape was examined.
KURT, ADEM, BOZ, MUSTAFA
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The Structure and Properties of Powder Copper Hardened by Fine Tungsten Particles

Powder Metallurgy and Metal Ceramics, 2014
The Cu–W pseudoalloys with 2–10 vol.% of nanosized tungsten particles (30–40 nm) are studied. The bulk samples with relative density up to 99.1–99.6% are produced by shock compaction. The introduction of nanosized tungsten particles increases the pseudoalloy strength to 2.7HCu with insignificant reduction in plasticity (δ = 13%) and conductivity (to δ =
P. Ya. Radchenko, O. I. Get’man, V. V. Panichkina, V. V. Skorokhod, Yu. N. Podrezov, D. G. Verbilo, A. V. Laptev, A. I. Tolochin   +7 more
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Observation of particle behavior in copper powder compact during pulsed electric discharge

Materials Science and Engineering: A, 2003
Abstract The behavior of spherical copper powder particles of uniform size (average diameter: 550 μm) in a powder compact was observed under an optical microscope during a single-pulse electric discharge of 500 ms duration. The morphologies of necks formed between powder particles were observed under a scanning electron microscope, and their ...
O. Yanagisawa, H. Kuramoto, K. Matsugi, M. Komatsu   +3 more
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Effects of copper micro-particles on the detonation characteristics of RDX powder

Journal of Physics D: Applied Physics, 2009
The effects of copper micro-particles on the detonation characteristics of RDX powder were investigated in a horizontal shock tube with internal dimensions of 100 mm diameter and 4 m length using an instantaneous spectrum detection apparatus. The emergence time and emission spectral intensity of the main products such as NO2, H, C2, O, CO, CH2O, CO2 ...
Mi-An Xue, Xiaoli Yuan, Xiaoying Fu, Jinghe Wu, Pengzhi Lin, Dong Hu, Song Ye, Wenjun Zhu, Yanping Wang, Zhongwei Huang   +9 more
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Analysis of particle rolling and intrinsic rotations in copper powder during sintering

Journal of Materials Science, 2012
The common theoretical model used to describe the sintering process is the two particle model. This model describes comprehensively the growth of inter-particle contacts driven by the Laplace pressure. In three dimensions this model fails as cooperative material transport (i.e., movements of powder particles) occurs.
B. Kieback, M. Noethe, R. Grupp, J. Banhart, T. Rasp, T. Kraft   +5 more
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