wolf minerals limited is an asx wlf and aim wlfe listed specialty metals company focused on developing the drakelands mine tungsten and tin project, in devon in the uk.. the company listed on the asx in february 2007 and later that year acquired the hemerdon project, which they have since renamed drakelands mine.
tungsten iv telluride w te 2 is an inorganic semimetallic chemical compound.in october 2014, tungsten ditelluride was discovered to exhibit an extremely large magnetoresistance: 13 million percent with no known saturation point. the resistance is proportional to the square of the magnetic field.
copper–tungsten tungsten–copper, cuw, or wcu is a mixture of copper and tungsten. as copper and tungsten are not mutually soluble, the material is composed of distinct particles of one metal dispersed in a matrix of the other one. the microstructure is therefore rather a metal matrix composite instead of a true alloy.
the .50 browning machine gun .50 bmg, 12.7×99mm nato and designated as the 50 browning by the c.i.p. is a cartridge developed for the browning .50 caliber machine gun in the late 1910s, entering official service in 1921. under stanag 4383, it is a standard cartridge for nato forces as well as many non-nato countries. the cartridge itself has been made in many variants: multiple generations .
in the 60s, dieter ehrt invented the bending technology for flat material which measures each bend angle and provides spring back compensation. this gives the bend angle of flat materials true accuracy. this is attained by using bending prisms with electronic angular measurement technology. the principle is easy, but smart: while bending two .
spot welding or resistance spot welding is a type of electric resistance welding used to weld various sheet metal products, through a process in which contacting metal surface points are joined by the heat obtained from resistance to electric current.. the process uses two shaped copper alloy electrodes to concentrate welding current into a small 'spot' and to simultaneously clamp the sheets .
a variety of processes, equipment, and materials are used in the production of a three-dimensional object via additive manufacturing. 3d printing is also known as additive manufacturing, therefore the numerous available 3d printing process tend to be additive in nature with a few key differences in the technologies and the materials used in this process.
tungsten vi oxide, also known as tungsten trioxide or tungstic anhydride, wo 3, is a chemical compound containing oxygen and the transition metal tungsten.it is obtained as an intermediate in the recovery of tungsten from its minerals. tungsten ores are treated with alkalis to produce wo 3.further reaction with carbon or hydrogen gas reduces tungsten trioxide to the pure metal.
in a hot cathode, the cathode surface is induced to emit electrons by heating it with a filament, a thin wire of refractory metal like tungsten with current flowing through it. the cathode is heated to a temperature that causes electrons to be 'boiled off' of its surface into the evacuated space in the tube, a process called thermionic emission.
this is a list of named alloys grouped alphabetically by base metal.within these headings, the alloys are also grouped alphabetically. some of the main alloying elements are optionally listed after the alloy names.
the 5.56×45mm nato official nato nomenclature 5.56 nato, fyv-fyv-six is a rimless bottlenecked intermediate cartridge family developed in the late 1970s in belgium by fn herstal. it consists of the ss109, ss110, and ss111 cartridges. on 28 october 1980 under stanag 4172 it was standardized as the second standard service rifle cartridge for nato forces as well as many non-nato countries.
cobalt oxide/graphene composite are synthesized by first forming cobalt ii hydroxide co oh 2 on the graphene sheet from a cobalt ii salt and ammonium hydroxide nh 4 oh, which is then heated to 450 c for two hours to yield the oxide. safety. like most reactive cobalt compounds, cobalt oxide nanoparticles are toxic to humans and also aquatic .
titanium carbide, ti c, is an extremely hard mohs 9–9.5 refractory ceramic material, similar to tungsten carbide. it has the appearance of black powder with the sodium chloride face-centered cubic crystal structure. as found in nature its crystals range in size from 0.1 to 0.3mm. it occurs in nature as a form of the very rare mineral .
a halogen lamp, also known as a tungsten halogen, quartz-halogen or quartz iodine lamp, is an incandescent lamp consisting of a tungsten filament sealed into a compact transparent envelope that is filled with a mixture of an inert gas and a small amount of a halogen such as iodine or bromine.the combination of the halogen gas and the tungsten filament produces a halogen cycle chemical reaction .
the table below shows some of the parameters of common superconductors. x:y means material x doped with element y, t c is the highest reported transition temperature in kelvins and h c is a critical magnetic field in tesla. 'bcs' means whether or not the superconductivity is explained within the bcs theory
refractory metals can be worked into wire, ingots, rebars, sheets or foil. molybdenum alloys. molybdenum based alloys are widely used, because they are cheaper than superior tungsten alloys. the most widely used alloy of molybdenum is the titanium-zirconium-molybdenum alloy tzm, composed of 0.5% titanium and 0.08% of zirconium with molybdenum being the rest . the alloy exhibits a higher creep .
zirconium tungstate zr w o 4 2 is a metal oxide with unusual properties. the phase formed at ambient pressure by reaction of zro 2 and wo 3 is a metastable cubic phase, which has negative thermal expansion characteristics, namely it shrinks over a wide range of temperatures when heated.
gas tungsten arc welding gtaw , also known as tungsten inert gas tig welding, is an arc welding process that uses a non-consumable tungsten electrode to produce the weld.the weld area and electrode is protected from oxidation or other atmospheric contamination by an inert shielding gas argon or helium , and a filler metal is normally used, though some welds, known as autogenous welds, do .