A novel chemical method was evaluated to fabricate the ultrafine tungsten heavy alloy powders with bater-base ... The obtained powders were characterized by X-ray diffraction, XRF, field-emission scanning microscope
The ultra-fine and less agglomerated titanium carbonitride particles were successfully synthesized by magnesiothermic reduction with low feeding rate..
Ultrafine TiC-15%Co powders were synthesized by a thermochemical process, including spray drying, calcination ... Ultrafine TiC particles were formed by carbothermal reaction at 1200~125, which is significantly lower ... The oxide powders were mixed with carbon powder to reduce and carburize at 1100~125 under argon or hydrogen
Ultrafine TaC-5%Co composite powders were synthesized by spray conversion process using tantalum oxalate ... The calcined Ta-Co oxide powders were spherical agglomerates consisted of ultrafine primary particles ... The observed size of TaC-Co composite powders by TEM was smaller than 200 nm.
nanostructured metallic materials are generally synthesized by bottom-up processing which starts from powders ... In this study, the bottom-up powder metallurgy and High Pressure Torsion (HPT) approaches were combined
Ultrafine AlN powder with a particle size of 600 nm and a specific surface area of 9.54 was prepared ... The milled powders were pressureless-sintered at for 4 h under atmosphere. ... The densification behavior and the sintered microstructure of the milled AlN powder were investigated
The ultrafine WC-TiC-Co alloy prepared by sintering of mixed powder of ultrafine WC-13%Co powder and ... Ultrafine TiC-5%Co powders were easily formed by carbothermal reaction at due to using ultrafine powders ... Ultrafine TiC-5%Co powders were synthesized by spray drying of aqueous solution of TiO slurry and cobalt
Further, by the disintegration and attrition milling, the ultrafine-grained powder was obtained. ... The fabricated composite has an ultrafine-grained microstructure. ... We used traditional B4C with precipitates of free graphite and Al powder as initial materials.
The reduced W-Cu nanocomposite powder exhibits excellent sinterability, and the ultrafine W-Cu composite ... to produce W-Cu powder. ... of WO3-CuO powder mixtures is investigated.
This fly ash powder is mostly composed of pure carbon, predominantly present as sp2. ... The obtained results show that ultrasound treatment is an effective tool for producing ultrafine particles
Recent studies have shown that ultrafine powders of herbal medicines provide better physical properties ... Thus, ultrafine Angelica powder was added into the oligosaccharide syrup to provide flavors and healthy ... The ultrafine Angelica powder was added into the oligosaccharide syrup process with different ratios
This white solid, usually encountered as a powder, is a specialty reducing agent used in the manufacture ... Nanopowders are agglomerates of ultrafine particles, nanoparticles, or nanoclusters. ... Nanometer sized single crystals, or single-domain ultrafine particles, r to ensure sterility.
The hardness results dem-onstrate the usefulness of the powders for a nano/ultrafine grained material ... was measured to verify the potential of the powders as thebasis for a bulk nano/ultrafine grained material ... 350℃ in order to eliminate surface oxide layers, which are the main obstacles for fabricating anano/ultrafine
Ultrafine cemented carbide with high toughness and hardness is now widely used. ... When the particle size is reduced to ultrafine, the hardness and other mechanical properties are improved ... The objective of this study is synthesis of nanostructured WC-Co powders by liquid phase method of tungstate
In this study, electrolytic copper powders were consolidated by high-pressure torsion process (HPT) ... After 10 turns, full densification was achieved by high pressure with shear deformation and ultrafine ... which is the most effective process to produce bulk ultrafine grained and nanocrystalline metallic materials
is added to obtain a homogeneous distribution of ultrafine TiC particulates in Fe matrix. ... ) (Fe, TiH2, Carbon) powders. ... Two kinds of powder mixtures are prepared from the starting materials of (a) (Fe, TiC) powders and (b
Ultrafine copper powder was prepared from slurry with hydrazine, a reductant, under . ... phase of Cu powders obtained. ... The morphology of Cu powder depended on that of the precursor of CuO and processing conditions.