This work reports on the electrochemical kinetic analysis of carbon steel powders produced during milling chips for 2, 3, and 5 h under an air atmosphere in a high-energy ball miller. aims to fill gap literature regarding transformation processes that affect powder production. information can be crucial specific metallurgy systems. The results obtained using Rietveld refinement method showed de...

BaY2F8 nanoparticles (NPs), doped with Yb3+ and Er3+ ions, were successfully produced by high-energy ball-milling. High-quality monoclinic single crystals (sp. gr. C2/m, a = 0.6969(3), b 1.0502(1), c 0.4254(1) nm, β 99.676°) grown from the melt Bridgman technique used as raw materials. The prepared nanocrystals comprehensively studied X-ray diffraction analysis, transmission electron microscopy...

Carbides, borides and nitrides of high melting transition metals were synthesized by high energy ball milling of elemental powder mixtures. The obtained hard material phases show a nanocrystalline structure with a saturation value of the crystal sizes between 7-8 nm. The kinetics of the reaction were investigated, and the nanocrystalline powders were densified by HIP. Introduction The formation...

Boron nitride nanotubes (BNNTs) have many fascinating properties and a wide range of applications. An improved ball milling method has been developed for high-yield BNNT synthesis, in which metal nitrate, such as Fe(NO3)3, and amorphous boron powder are milled together to prepare a more effective precursor. The heating of the precursor in nitrogen-containing gas produces a high density of BNNTs...

In this work, a blend of Ti, Nb, and Mn powders, with nominal composition 15 wt.% Mn, balanced Ti Nb wt.%, was selected to be mechanically alloyed by the following two alternative high-energy milling devices: vibratory 8000D mixer/mill® PM400 Retsch® planetary ball mill. Two ball-to-powder ratio (BPR) conditions (10:1 20:1) were applied, study evolution synthesized phases under each mechanical ...

In the present work, the behavior of Cu-Cr powder mixtures during mechanical alloying has been studied. The powder mixtures with 1, 3 and 6 weight percents of Cr in Cu were treated. They were milled in a ball mill with two different speeds of 250 and 500 rpm using equal numbers of 1 and 2 centimeters balls. The weight ratio of balls to powders was 10 to 1 under argon atmosphere. Ethanol was use...