High purity uniform shapes Tungsten Mesh and Chromium plated
Tungsten Mesh is widely used as screen or gauze. Standard size ranges from 0.75
mm to 1 mm to 2 mm diameter with strict tolerances and alpha values (conductive
resistance) for uses such as gas detection and thermometry tolerances. Custom
wire alloys and gauge sizes can be fabricated upon customer’s request. Crystallization,
solid state and other ultra high purification processes such as sublimation are
used to produce materials. Custom compositions are produced for commercial,
research and new proprietary technology applications. Rare earth metals and
most other advanced materials are cast into various forms including bar, rod or
plate through processes such as nanoparticles and in the form of solutions and
organometallics. Tungsten is also produced as ingot, pellets, granules, powder,
pieces, discs and compound forms such as oxide. Other shapes can be customized
as per request.
The slow positron yield has been
measured for various tungsten moderator samples from a 22Na radioactive source.
Investigation of multi-folded tungsten mesh, W(100) single crystal foil and W
polycrystalline foil samples was performed. It was observed that the fast to
slow conversion efficiency of the tungsten mesh moderator depends upon the
annealing pretreatments, the number of folding layers and the chemical etching
duration. An optimal efficiency of 1.2 x 10-3 was achieved with 5 min etching
duration and a folding number of 12 layers with the raw tungsten mesh material
having a wire diameter of 20 μm and transmission efficiency of 92.5%.
Tungsten
wire mesh has high physical stability and
print repeatability. This mesh has high tensile strength, lower elongation and
consistent quality to fulfill various technical demands of screen printing
applications in the electronics and photovoltaic markets. Tungsten has high
melting point and high corrosion resistance. Tungsten has high tensile strength
at temperatures over 3410°C and is environment friendly.
Study was done of the structural and
phase transformations in tungsten-containing functional coatings of carbon
steels obtained in high-energy processes of implanting tungsten carbide
micropowders by the method of complex pulse electromechanical processing. It is
observed that an intensive austenization of steel occurs with the dissolution
of a powder of tungsten carbide with the subsequent formation of composite
gradient structures as a result of the decomposition of supercooled austenite
supersaturated with tungsten both by the diffusion mechanism and by the
spinodal decomposition mechanism during thermoforce action in the deformation
zone. It was found that individual zones of the tungsten-containing phases of
the alloy were in the liquid-phase state and underwent spinodal decomposition
with the formation of highly disperse carbide phases of globular morphology.
A study was done of the metallic
meshes for space antenna transformable reflectors. Optical characteristics of
four metallic meshes (15 micron tungsten, 15 micron gold-plated tungsten, 20
micron molybdenum, and 50 micron Ni-coated steel) were investigated with the
Nikolet IS50 spectrophotometer. The spectral optical characteristics of these
metallic meshes in the range from 0.4 to 2.5 microns were required for thermal
design of space antenna reflectors.
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