The nanocrystalline tungsten powder with the minimum grain size of around 5 nm was fabricated by mechanical alloying. The powder refinement process and the influence of ball to powder ratio (BPR) on the morphology and microstructure of tungsten powder were investigated.

Powders of Ti, Mn, Zr, Cr, and V were mixed in an appropriate proportion and then mechanically alloyed inside a planetary ball mill for 5, 10 and 20 h under argon atmosphere. BM was performed in a Retsch PM100 type mill with rotational speed of 300 rpm. The ball to powder weight ratio was 15:1 with four 16 g steel balls of 15 mm …

Semantic Scholar extracted view of "Microstructure and magnetic properties of Mn–Al–C alloy powders prepared by ball milling" by an et al.

Hence, the present investigation of Ti-Mg-Sr ternary alloy concentrates on powder synthesis with a high-energetic ball milling process and compaction followed by microwave sintering.

The phase structures of AlCrFeNiCu and AlCrFeNbMo were predicted and verified. The microstructure, phase structure, and properties of alloy powders and sintered alloy were investigated under various ball-milling conditions. Results show that the phase formation rule of HEA is an empirical criterion that still needs experimental verification.

The effect produced by the time of milling the aluminum Al–12Si alloy powder in a ball mill in an air atmosphere on the macrostructural characteristics of aluminum was studied. The milling time was from 5 to 20 min at a speed of 300 rpm and a ball to powder mass ratio of 8 : 1. The treated matrix alloy powder was mixed …

The preparation of the Zr 84 wt%–Al 16 wt% non-evaporable getter alloy by means of mechanical alloying and its hydrogen absorption characteristics were investigated. Scanning electron micorscopy and energy dispersive X-ray analysis revealed that the mechanical ball-milling with Ni was successfully employed to coated nickel …

This study investigated the phase transformations and magnetic properties of Ni-Mn-Ga alloy powders prepared by dry ball milling in argon atmosphere. The Fe and Cr elements were found to be introduced in the alloy after ball milling, which should result from the severe collision and friction among the particles, balls, and vial.

Fe-6.5 wt.% Si nanocrystalline alloys with good magnetic softness were prepared by mechanical alloying at various milling times (0–12 h) via a high-energy ball mill. Elemental iron and silicon powders were used as raw materials. Structural evolution, particle size distribution, and magnetic properties were investigated for as-milled Fe-Si …

During ball milling process, the decrease in crystallite size and increase in lattice strain of Nbss powders lead to continuous broadening of their diffraction peaks.

High-energy ball milling represents an efficient process for producing composite powders consisting of ceramic particles dispersed in a metallic matrix. However, collision events, plastic deformations, and cold welding during the milling lead to a flake or block-like shape of the resulting composite powders.

Request PDF | Methanation of CO2 by using LaNi5 alloy with ball-milling methodLaNi5をいた CO2とH2からのCH4の | Methane production from carbon dioxide and hydrogen is known as the ...

To study the effect of ball milling alone, as-received aluminium alloy AA2219 powder was also ball-milled for 6 h without any reinforcement. Toluene was used as the process controlling agent (PCA) during the ball milling to minimize cold welding and to prevent powder sticking on the milling media and walls of the stainless steel container.

Nanomaterial Cr75Ni25 alloy with a mean crystallite size of 8.3 nm and microstrain of 1.23% after 48h of milling was synthesized by mechanical alloying using a high energy planetary ball milling. The morphological changes and particles size were investigated by scanning electron microscopy and laser diffraction.

Ball milling is a mechanical technique that is broadly used to grind powders into fine particles [134–141]. The reactants are generally broken apart using solvent molecules in the traditional method; but in ball milling, reactants are broken by using mechanical forces. The term mechanochemistry has been introduced very recently [142].

The powders are mainly composed of γ-TiAl as well as a small amount of AlTi3. The TiAl alloy powders of high energy ball mill/2h and sintered at 650°C/2h get plasma spheroidization. Spheroidizing powders with fine texture, γ-TiAl and AlTi3 phase, particle size of 10~40μm are obtained.

Nonequilibrium titanium-nitride alloy powders have been fabricated by a high energetic ball mill under nitrogen gas flow at room temperature and characterized by means of x-ray diffraction, scanning electron microscopy, transmission electron microscopy, and differential scanning calorimetry.

The high-energy ball mill processing can be divided in three main groups according to the mechanisms involved and/or the purpose envisaged: Mechanophysical conditioning, Mechanochemical synthesis ...

Nonequilibrium titanium-nitride alloy powders have been fabricated by a high energetic ball mill under nitrogen gas flow at room temperature and characterized by means of x-ray diffraction, scanning electron microscopy, transmission electron microscopy, and differential scanning calorimetry. Initial hcp titanium is completely transformed to nonequilibrium-fcc …

Mechanical alloying is a technology to realize solid metal alloying by high energy grinding machine or ball mill, abbreviated as MA, which can be used to prepare special alloy powder. Its principle is: in the process of mechanical grinding or ball milling, metal powder, alloy powder, or the mixture of metal powder and alloy powder …

This study investigated the phase transformations and magnetic properties of Ni-Mn-Ga alloy powders prepared by dry ball milling in argon atmosphere.

The results clearly demonstrate that Mg-Zn-Ca powders synthesized through single step ball milling process exhibit superior reaction efficiency in degrading azo dyes. The work has implications in arriving at an easy and efficient method for functional applications of partially amorphous Mg-Zn-Ca alloy powders.

Ni-Cr-P alloy powder was mechanically alloyed in a planetary high power ball mill. Powder milled for different duration and samples sintered of the powder were analyzed using SEM, DSC, hardness ...

The effects of processing parameters in ball milling and the different behaviors of Cu-Nb and Cu-Mo alloys during milling were investigated. High powder yields can be obtained by changing the BPR ...

The effects of processing parameters in ball milling and the different behaviors of Cu-Nb and Cu-Mo alloys during milling were investigated. High powder yields can be obtained by changing the BPR …

In this work, Nd–Fe–B alloy powders are fabricated via high energy ball milling and their fracture behavior and magnetic properties are investigated at different milling times. The powder characteristics (particle shape, size, size distribution, and microstructure) and magnetic properties of the Nd–Fe–B alloys are systematically …

A composite of rapidly solidified Al-6061 alloy powder with graphite particle reinforcements was prepared by ball milling and subsequent hot extrusion.

Mechanical alloying was performed with a Pulverisette 6 planetary ball mill for 30 h, 10:1 ball-to-powder ratio (BPR), mill speed of 350 rpm under an n-heptane (wet milling) atmosphere using stainless …

This work focuses on the effect of milling time and alloying elements on the microstructural evolution of Ti-Nb-based alloy. The Ti-30Nb-13Ta-2Mn (wt. %) alloys were synthetized by mechanical alloying (MA) using a planetary ball mill in agate medium.

In MA, usually by ball milling, pure elemental powders or pre-alloyed powders are subjected to vigorous collision, repeated cold welding, fracturing, and rewelding by the milling media.