Results 261 to 270 of about 24,206 (306)

Platinum Alloy Catalysts by High Energy Ball-Milling

ECS Meeting Abstracts, 2010
Abstract not Available.
Jason Ma, Samad Firdosy, George Grüner, Jean-Pierre Fleurial, S.R. Narayanan   +4 more
openaire   +1 more source

Dehydroxylation of high-energy ball-milled diasporic bauxite

Journal of Thermal Analysis and Calorimetry, 2018
In this study, diasporic bauxite was mechanically activated for different durations (15, 30, 60, 90 and 120 min) by the planetary mono mill. The speed of the main disk and ball-to-mass ratio were kept constant at 600 rev min−1 and 25, respectively. The chemical composition of the ore was determined via X-ray fluorescence. Structural changes and thermal
Yılmaz, Volkan Murat, Parlak, Tugba Tunc, Yildiz, Kenan, Yılmaz, Volkan Murat   +3 more
openaire   +2 more sources

Amorphization of selenium induced by high-energy ball milling

Physical Review B, 1997
Structural changes occurring in the crystalline element selenium upon high-energy ball milling has been studied. Milling experiments have been performed at the ambient temperature and at a cryogenic temperature of -100 degrees C, respectively. The final milling products under both conditions were found to be a fully amorphous phase after several hours ...
G. J. Fan, F. Q. Guo, Z. Q. Hu, M. X. Quan, K. Lu   +4 more
openaire   +1 more source

Synthesis of Nano-WC by High-Energy Ball Milling

Materials Science Forum, 2013
Nanosized tungsten carbide (nanoWC) has been widely studied and applied in many industries as hard materials since it has good combination of high hardness and strength. Thermal mechanical alloying method consisting of high-energy ball milling and subsequent carbonization is a common synthetic approach to prepare nanoWC.
Le Yang Dai, Shao Fen Lin, Jing Feng Chen, Wen Chun Wang   +3 more
openaire   +1 more source

Synthesis of Nd0.7Sr0.3MnO3 ceramics by high-energy ball milling

Journal of Alloys and Compounds, 2008
Abstract Strontium doped perovskite-type manganite Nd0.7Sr0.3MnO3 is synthesized by high-energy ball milling. Nd0.7Sr0.3MnO3 single phase with perovskite structure is formed completely after milling 4 h and the perovskite phase decreases gradually and changes into amorphous state with increasing ball milling time up to 12 h.
S.S. Chen, C.P. Yang, Z.H. Zhou, D.H. Guo, H. Wang, G.H. Rao   +5 more
openaire   +1 more source

High Energy Planetary Ball Milling of SiC Powders

Key Engineering Materials, 2007
The effects of high-energy ball milling on SiC powders were studied using a planetary apparatus. Conditions to obtain nanostructured SiC powders with an average crystallite size of 4 nm were determined and powders were characterized by XRD, SEM and TEM analyses. This process was applied to prepare fine powders leading to dense SiC ceramics by sintering
Yu Bai Pan, Zheng Ren Huang, Dong Liang Jiang, Léo Mazerolles, D. Michel, J.L. Pastol, Guillaume Wang   +6 more
openaire   +1 more source

High energy ball milling of a Al65Cu20Fe15 quasicrystalline alloy

Journal of Non-Crystalline Solids, 2004
The phase transformations of the quasicrystals and related crystalline phases present in an Al65Cu20Fe15 alloy were studied by high energy ball milling. The milling was carried out in an attritor mill at speeds of 200 and 400 rpm for 5, 10, 20 and 40 h with a ball to charge ratio of 20:1, using hexane as a process control agent.
N.K. Mukhopadhyay, Vinod Kurup, V.C. Srivastava, P.B. Joshi, R.K. Mandal   +4 more
openaire   +1 more source

Characterization of High-Energy Ball Milling of Ba Hexaferrite

Materials Science Forum, 2003
Ba-hexaferrites was synthesized by using high-energy ball milling process and particle size, densification and microstructure were characterized. BaFe 12 O 19 phase was prepared from barium carbonate and iron oxide using ball to powder ratio of 10:1 and 4:1, milled for 1 and 5 hours. Pellets were sintered from 1000 to 1300 °C.
P.I. Paulin Filho, R.R. Corrêa
openaire   +1 more source

DEM Modeling and Optimization of the High Energy Ball Milling

DESIGN, CONSTRUCTION, MAINTENANCE, 2022
The Discrete Element Method (DEM) is a numerical method for simulating the dynamics of particles processes. This present work focuses on DEM simulations of a scale laboratory planetary ball mill through DEM Altair 2021.2 software to optimize and modulate the milling parameters. The simulation results show a good agreement with the experiments.
openaire   +1 more source

Structural transformations of alumina by high energy ball milling

Journal of Materials Research, 1993
Room temperature, high energy ball milling was applied to various transition aluminas (γ, K, χ), producing thermodynamically stable α-alumina–a phenomenon that could otherwise be achieved only by high temperature (1100–1200 °C) heat treatment. The transformation proceeds in two steps.
P.A. ZielińAski, R. Schulz, S. Kaliaguine, A. Van Neste   +3 more
openaire   +1 more source