Aug 01, 1996 OSTI.GOV Journal Article Ball milling-induced combustion in powder mixtures containing titanium, zirconium, or hafnium
Jul 01, 1993 Ball-milling-induced amorphization in Ni x Zr y compounds A parametric study Y. Chen, M. Bibole, R. Le Hazif, and G. Martin Phys. Rev. B 48 , 14 Published 1 July 1993
A vibrating frame grinder has been instrumented for evaluating the amplitude and frequency of ball oscillation, as a function of the amplitude of vibration of the frame and of the ball mass. Based on such measurements, it is found that Ni x Zr y compounds become fully amorphized provided the specific milling intensity is greater than a temperature- and composition-dependent threshold value.
crystals Article Mechanochemical Reactions of Lithium Niobate Induced by High-Energy Ball-Milling Laura Kocsor 1,2, L szl P ter 1, G bor Corradi 1, Zsolt Kis 1, Jeno Gubicza 3 and L szl Kov cs 1, 1 Wigner Research Centre for Physics, Hungarian Academy of Sciences, Konkoly-Thege Mikl s t 29-33, 1121 Budapest, Hungary
This paper, by no means exhaustive, focuses on high-energy ball-milling of oxides, on their mechanically induced changes and on the consequences of such changes on their physical and chemical properties.High-energy ball-milling offers a fortunate combination of technical simplicity and of complexity both of physical mechanisms which act during milling and of mechanosynthesized materials.
Abstract The mechanochemical treatment of -Fe 2 O 3 powder was done concurrently in air and oxygen atmospheres using a conventional planetary ball mill. The influence of the duration of milling and of the balls-to-powder mass ratio on the transformation of -Fe 2 O 3 was investigated. Under appropriate milling conditions, -Fe 2 O 3 completely transforms to Fe 3 O 4 , and for prolonged ...
Feb 16, 2010 2.2.1. Sample preparation by ball milling cold room The drugs were milled using an oscillatory ball mill Mixer Mill MM301, Retsch GmbH amp Co., Germany. A central composite face centered design was used for the milling experiments for both compounds. The experimental design was created using MODDE software version 7, Umetrics AB, Sweden.
Oct 25, 2019 Amrute et al. show that ball milling of boehmite, -AlOOH, created 13-nanometer-diameter corundum nanoparticles of high purity through a mechanically induced dehydration reaction and by the effect of milling impacts on the surface energy of the particles. Science, this issue p. 485.
Four isostructural coordination polymer crystals having different metal ions were synthesized and studied for ball milling-induced glass formation. Distinct glass formation was discussed from crystal structures. Doping of molecules for CP glass during the milling was demonstrated, and it resulted in tunable 2018 Emerging Investigators
The compounds were synthesized in a high-energy planetary ball mill with varying milling parameters and different grinding tools. NaCl type Li2TiO3 -Li2TiO3 was formed by dry milling of lithium hydroxide with titania rutile or anatase and by a milling induced structure transformation of monoclinic -Li2TiO3 or spinel type Li4Ti5O12. Heating ...
INSTITUTE OF PHYSICS PUBLISHING JOURNAL OF PHYSICS D APPLIED PHYSICS J. Phys. D Appl. Phys. 37 2004 L45L48 PII S0022-37270487180-8 RAPID COMMUNICATION Field-ball milling induced anisotropy in magnetic particles Narayan Poudyal1, Baki Altuncevahir1, Vamsi Chakka1, Kanghua Chen1, Truman D Black1, J Ping Liu1, Yong Ding2 and Zhong Lin Wang2
Sep 25, 2017 The first example of milling induced guest encapsulation, appearing in 2016, is Szumnas use of ball milling to facilitate the encapsulation of C 60 or C 70 in peptidic, dimeric molecular capsules based on a resorcin4arene platform. 11 Milling facilitated quantitative complexation, but the same encapsulation complexes could be prepared also ...
the ball-milling treatment for 5 min was 2.7 C, indicating negligible influence of the heat on the phase transition from 1B to 1YG. Fig. S3 Photographs upper and thermography lower of 1 in the ball-milling holder. a Photographs of 1B crystal in the ball-milling holder before grinding.
en The effects of plastic deformation on Co microstructure after a high pressure torsion HPT process on unmilled and ball milled powders have been studied and compared to those induced simply by ball milling BM. X-ray diffraction analyses reveal that both processing routes generate large amounts of stacking faults in Co, which result in a mixture of hcp and fcc phases.
Ball Milling Induced Amorphization of Graphite and High Solubility in Ag-Gd Solid Solution p.477. Minimization of Nitride Formation during Mechanical Alloying of Ti-Al-Nb p.483. Formation of 25 Mol Fe 2 O 3-Al 2 O 3 Solid Solution by High-Energy Ball Milling p.489. Zirconia ...
Ball milling induced low-temperature carbothermic reduction of ilmenite Chen, Ying Ian, Hwang, T and Williams, JS 1996, Ball milling induced low-temperature carbothermic reduction of ilmenite, Materials letters, vol. 28, no. 1-3, pp. 55-58, doi 10.10160167-577X9600026-2.
Apr 15, 2019 Physically, the ball-milling-induced inter-particle compaction effect was considered crucial to facilitate the interfacial masselectron transfer processes during the reduction. The reduction pathway from NB to aniline via two intermediates was analyzed by liquid chromatography.
Milling-Induced Esterification between Cellulose and Maleated Polypropylene Wulin Qiu, Farao Zhang, Takashi Endo, Takahiro Hirotsu National Institute of Advanced Industrial Science and Technology, 2217-14 Hayashi-cho, Takamatsu 761-0395, Japan Received 11 November 2002 accepted 29 April 2003 ABSTRACT The ball milling of cellulose and maleic an- due to the formation of ester
The characteristic rotation speed R for the ball milling exists, at which the crystallite size of the starting powder suddenly decreased. The grain size in the bulks sintered using ball-milled powders also decreased and thermoelectric properties were enhanced mainly by the induced carriers, rather than by the reduction in thermal conductivity.
Based on in situ observations of the field-ball milling in a transparent container, the mechanism of field-induced anisotropy in the nanostructured hard magnetic particles is discussed. Nanocomposite hard magnetic materials have drawn considerable attention for
Ball-milling induced debonding of surface atoms from metal bulk for construing high-performance dual-site single-atom catalysts Angew Chem Int Ed Engl. 2021 Aug 11. doi 10.1002anie.202109356. Online ahead of print. Authors Shuyan Song 1 ...
Request PDF Ballmilling induced debonding of surface atoms from metal bulk for construing highperformance dualsite singleatom catalysts Insert abstract text here. One of the most ...
Jan 01, 1995 Various experimental techniques have been used to investigate the effect of mechanical milling on the structural stability of rapidly solidified aluminum-based metallic glasses. Using transmission electron microscopy TEM and X-ray diffraction methods, the
Ball milling of melt-spun Fe 90 Zr 10 ribbons in a planetary ball mill AGO-2 induces their crystallization into supersaturated -Fe Zr grains. The crystallization degree of the amorphous phase increases with increasing milling time, with a fully crystalline state being obtained after 30 min at a milling
We have investigated the ball milling effects for thermoelectric Bi 1- x Sr x CuSeO x 0,0.1 materials. The characteristic rotation speed R for the ball milling exists, at which the crystallite size of the starting powder suddenly decreased. The grain size in the bulks sintered using ball-milled powders also decreased and thermoelectric properties were enhanced mainly by the induced ...
Nov 15, 2006 The ball milling-induced reduction of MoS2 by Al has been investigated. Although this is a highly exothermic reaction that, based on its thermodynamic properties, should progress as a self-sustaining process, ignition could not be achieved by ball milling. In order to identify the reason, XRD, particle size distribution, SEM, and DTA measurements were carried out on a series of samples milled ...
Apr 10, 2013 Ball-Milling-Induced Amorphization of Zeolitic Imidazolate Frameworks ZIFs for the Irreversible Trapping of Iodine Dr. Thomas D. Bennett , Department of Materials Science and Metallurgy, The University of Cambridge, Cambridge, CB2 3QZ UK, Fax 44 1223-334567
A Il CRYSTAL-AMORPHOUS PHASE TRANSITION INDUCED BY BALL-MILLING lN SILICON E. GAFFET and M. HARMELIN Centre dEtudes de Chimie M tallurgique -CNRS, 15 Rue G. Urbain, F-94407 VitrySeine Cedex ...
Ball-milling induced debonding of surface atoms from metal bulk for construing high-performance dual-site single-atom catalysts.
Jun 27, 2018 The SMZVI was prepared by ball-milling the industrially reduced iron powders. Briefly, the industrially oxidized scales was reduced into the iron powders in H 2, and then the powers were through the 320 mesh sieve and ball-milled for about 120 h by the steel balls 510 mm in a ball mill under 7.5 kW power at room temperature. The final products or SMZVI were obtained by cleaning the ball-milled
Jan 01, 2002 Ball milling induces self-sustaining reactions in many sufficiently exothermic powder mixtures. The process begins with an activation period, during which size reduction, mixing, and defect formation take place. The MSR mechanically induced self-propagating reaction is ignited when the powder reaches a well defined critical state.
Aug 11, 2021 Insert abstract text here. One of the most pressing challenges in single-atom catalysis is the manipulation of the coordination environment of the central metals to
ball milling-induced plate-like sub-microstructured zero valent iron SMZVI to DDT in a real soil environment is studied. It has been found that such SMZVI exhibits much higher degradation performances to DDT in soil than commercial ZVI powders under acidic conditions. More than 95 DDT could be degraded within 80 min in the 5 ppm DDT-
reactions or pressure-induced disordering can also be in-duced by the transient pressure peaks created by collisions during high-energy ball milling. High-energy ball milling has been successfully used to produce ultrafine ceramic powders and to synthesize
Jan 01, 2011 In fact, the powder pattern of the hexagonal phase could be refined with a structural model based on the tungsten bronze structure. The hexagonal phase produced by high-energy ball milling of RbNbWO 6 transforms back to the pyrochlore structure upon heating to 773 K in air. A similar phase was obtained by ball milling the mixture RbNbWO 6 WO 3, but, in this case, the stoichiometric