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Phase transformation in Nb—16 at.% Si processed by high

1997-10-1  High-energy ball milling can be used to produce intermetallic compounds by mechanical al- loying, reactive milling or conventional milling and results in an

Nanocrystalline Nd2Fe17 synthesized by high-energy ball

2010-5-5  High-energy ball milling (HEBM) is a widely used technique for the mechanical al loying or processing of a great variety of materials [ 1–3 ], and has opened exciting horizons in

(PDF) INFLUNCE OF MILLING TIME AND BALL-TO-POWDER

The two key important parameters in mechanical alloying process, namely, milling time (1 and 10 h) and ball-to-powder ratio, BPR (5:1 and 15:1) were taken as variable input parameters.

Hydrogen absorption in nanocrystalline Mg2Ni formed by

1995-2-1  Mechanical alloying by ball-milling avoids melting of the elements and forms the compound through solid- state reaction. Although ball-milling is quite a common technique, published results on ball-milled Mg and Ni powders have not yet been shown to produce single- phase, stoichiometric Mg2Ni [3,4].

(PDF) Process Engineering with Planetary Ball Mills

Ball-milling synthesis consists in carrying out chemical reactions by application of mechanical force (mechanochemistry) in the form of collisions between the accelerated milling media (balls)

MECHANICAL ALLOYING OF THE Fe-Zr SYSTEM IN

2021-4-21  Ball milling has proved to be an easy tool for synthetizing amorphous phases /l-4/ as well as intermetallic compounds /5-8/. The end products of the milling process strongly depend on the milling conditions. It has been pointed out, indeed, that using different ball mills /9,10/ or different

Mechanosynthesis of Nanophase Powders M

2005-4-13  loying, which are basically using the same or very similar apparatuses, i.e., milling or size reduction devices, which could be generally described as ball mills. A recent thorough analysis by Suranarayana [1] of the processes related to mechanical alloying defines mechanosynthe-sis as a mechanochemical synthesis, attributing most of

Amorphization of the intermetallic compound V2Zr by ball

1993-5-2  Ball milling has been found to have similar effects on the structure of inter- metallics [1]. However, it has also been used to generate amorphous materials from mixtures of elemental powders. The last method requires mixture and/or interdiffusion of the spatially separated pure components first and often starts with the formation and subsequent supersatura- tion of mixed crystals [2].

Preparation and Microstructure of Ir-Zr-W Alloys by Powder

2009-7-1  From the experimental results, we can know that the mechanical al- loying time for high-energy ball-milling need more time be- cause iridium powder not only is very stiff, but also has a relatively high inertia, so it is not easy to react with ZrH 2 powders even the particle size of ZrH 2 powder used in this experiment is superfine.

(PDF) Zn–Cr double metal cyanide catalysts synthesized by

The ball-milling (BM) method benefits the stabilization and dispersion of metallic particles for the preparation of the PtSnK–Mo/ZSM-5 catalyst.

MECHANICAL ALLOYING IN PLANETARY MILLS OF HIGH

2012-2-13  Milling conditions Mechanical milling was performed at the Corpo-rate Research Centre of the European Aeronautic Defence and Space Company (EADS) in the fol-lowing milling device: planetary ball mill Pulverisette 6 (Fritsch, Germany). The vial and the balls (10 mm diameter) are made up of hardened steel. The ball-to-powder ratio was 5:1.

Milling and mechanical alloying of inorganic nonmetallics

loying (MA). When applied to metallic materials, MA is associated with repeated cold welding and fractur-ing of metal powder particles during the high energy ball milling characteristic of the process.2 While MA was originally used for production of oxide disper-sion strengthened superalloys, it later proved to be a

MECHANICAL ALLOYING OF THE Fe-Zr SYSTEM IN

2021-4-21  Ball milling has proved to be an easy tool for synthetizing amorphous phases /l-4/ as well as intermetallic compounds /5-8/. The end products of the milling process strongly depend on the milling conditions. It has been pointed out, indeed, that using different ball mills /9,10/ or different

The formation of ternary compound Fe3Mo3C by ball

2020-7-2  Ball milling of MO in nitrogen and ammonia gases has been studied. After heating, the formation of an intriguing ternary compound, Fe,MosC, --x, was observed as a result of Fe (and C) contamination loying of Fe-MO-C powders, 5 g of pure molybdenum, iron (purity better- than 99% and particle size about 75 pm), and

Mechanosynthesis of Nanophase Powders M

2005-4-13  loying, which are basically using the same or very similar apparatuses, i.e., milling or size reduction devices, which could be generally described as ball mills. A recent thorough analysis by Suranarayana [1] of the processes related to mechanical alloying defines mechanosynthe-sis as a mechanochemical synthesis, attributing most of

Journal of Alloys and Compounds National Chiao Tung

2015-5-21  In the ball-milling process, the weight ratio for the ball/powder was 20. The milling ball was made of agate and its diameter was 3 mm. A planetary high-energy ball mill was loying treatment, the sample was subjected to 1.6 V anodization for various dura-tions where the total coulomb charge was kept at 3, 6, and 12 C, respectively.

Hydrogen generation from Al‐water reaction catalyzed by Fe

loying Al with Li, Ga, Sn, Mg, In, Fe, or Cu by either ball milling or melting,15-23 high-energy ball milling Al with metal oxide, graphite, metal hydride, soluble inorganic salt, BiOCl, polytetrafluoroethylene, etc,24-33 Al surface modifi-cation,34,35 as well as implementing different catalysts.36-42 Soler et al11 and Ma et al13 used low

Hydriding and dehydriding kinetics of melt spun

2014-2-20  Indubitably, ball-milling is a very effective method for the preparation of nanocrystalline and amorphous Mg and Mg-based alloys. Particularly, it is suitable to solu-bilize particular elements into MgH2 or Mg2NiH4 above the thermodynamic equilibrium limit, which is helpful to destabilize MgH2 or Mg2NiH4 [18]. However, the milled

Elucidating the Impact of Cobalt Doping on the Lithium

2017-4-4  planetary ball-milling and cast onto aberyllium (Be) disk (thickness: 250 mm, Brush Wellman) that served concurrently as the current collector and “window” for the X-ray beam. The coated Be disk was dried for 30 min at 808Cunder ambient atmosphere and sub-sequently at 408Cunder vacuum overnight. Metallic lithium foil served as the counter

Addition of a Block Copolymer to Polymer Blends

steel ball bearings measuring 6.4 and 7.9 mm in diameter, was loaded into a hardened steel vial. The vial, sealed under Ar (<10 ppm of O 2), was subsequently placed in a nylon sleeve designed to allow peripheral flow of liquid nitrogen, and the external temperature of the vial was monitored (and main-tained below -180 °C) throughout milling.

Journal of Alloys and Compounds National Chiao Tung

2015-5-21  In the ball-milling process, the weight ratio for the ball/powder was 20. The milling ball was made of agate and its diameter was 3 mm. A planetary high-energy ball mill was loying treatment, the sample was subjected to 1.6 V anodization for various dura-tions where the total coulomb charge was kept at 3, 6, and 12 C, respectively.

PHYSICS OF STRENGTH AND PLASTICITY

2020-6-30  by ball milling and the effect of TiO 2 reinforcements on structural and mechanical properties. 2. loying. Figures 4, e and f show the presence of more weight per-centages of TiO 2 particles in the matrix and this will enhance the mechanical properties of the

3D Morphology of Bimodal Porous Copper with Nano

2020-7-31  dimensional low-energy ball milling apparatus (QM-A light ball milling machine, Xianyang, China). The mixed powders were then used to prepare a series of ternary precursor alloys with constant Cu content (25 atom %), adjustable Al content (from 10 to 60 atom %), and Fe content (from 65 to 15 atom %): Al x Fe 75 Cu 25−x, x = 10, 20, 30, 40, 50

Hydriding and dehydriding kinetics of melt spun

2014-2-20  Indubitably, ball-milling is a very effective method for the preparation of nanocrystalline and amorphous Mg and Mg-based alloys. Particularly, it is suitable to solu-bilize particular elements into MgH2 or Mg2NiH4 above the thermodynamic equilibrium limit, which is helpful to destabilize MgH2 or Mg2NiH4 [18]. However, the milled

SYNTHESIS AND CHARACTERIZATION OF

2016-10-27  loying method. The influence that the composition and milling time have on the morphology, structure and magnetic properties of nanostructured powders was studied by means of X-ray diffraction, Scanning Electron Microscopy (SEM) and Vibrating Sample Magnetometer (VSM). After 30 h milling, X-ray diffraction results

Electrochemical Performance of Silicon/MWCNT

2014-2-22  loying process, 80 ml stainless steel bowl and 5 mm balls were used and ball to powder weight ratio was chosen as 10:1. In the last step, silicon powders were mechani-cally milled in MWCNT suspension to provide mechan-ical locking of silicon with MWCNT. Finally, obtained suspension was ltered and dried at 80 C in acuumv oven for 10 h.

Elucidating the Impact of Cobalt Doping on the Lithium

2017-4-4  planetary ball-milling and cast onto aberyllium (Be) disk (thickness: 250 mm, Brush Wellman) that served concurrently as the current collector and “window” for the X-ray beam. The coated Be disk was dried for 30 min at 808Cunder ambient atmosphere and sub-sequently at 408Cunder vacuum overnight. Metallic lithium foil served as the counter

Mechano-Synthesis, Characterization, and Magnetic

2006-11-18  loying,12 for the fabrication of stoichiometric and chemi-cally pure spinel ferrites nanoparticles. However, little is known about the use of mechanical milling in the preparation of ferrites from molecular precursors, in particular layered hydroxide compounds. * Authors to whom correspondence should be addressed. +(359) 2 979 25 28.

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2009-9-13  powder prepared by high energy ball milling [ J] . Trans Nonferrous Met soc China, 2001, 11(6): 795- 799. LIN Jin-xin, PANG Hua, JIA Wei, al. Preparation and microstructure of AF V -Fe alloy by mechanically al- loying [ J] . The Chinese Journal of Nonferrous Metals, ( in Chinese),1999, 9(Supp1. 1) : 195- 198. CHEN Jiarrxun, HUANG Bapyun, ZHAO

球料比对羰基铁粉片型化演变和电磁性能的影响 豆丁网

2016-4-10  JOURNALOF AERONAUTICAL MATERIALS 2016,Vol 36 No pp.57 61球料比对羰基铁粉片型化演变和 电磁性能的影响 佛山市康泰威新材料有限公司广东省超硬与电磁功能材料工程技术研究开发中心, 广东 佛山 528216; 华南理工大学材料科学与工程学院, 广州 510640) 摘要: 以无水乙醇为隔离剂,通过湿法球磨制备了片