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Tungsten single crystal 74W183.85
Discovered in 1783 by J.J. and F. Elhuijar at Vergara, Spain.
[Swedish: tung sten = heavy stone; wolfram is named after wolframite]
French: tungstètene
German: wolfram
Italian: wolframio (tungsteno)
Spanish: wolframio
Description: Tungsten is generally obtained as a dull grey powder, which is difficult to melt. The bulk metal is lustrous an silvery-white, and resists attack by oxygen, acids and alkalis. Tungsten is used in alloys, to which it imparts great stength, in light bulb filaments and cutting tools.
| Metal single crystal properties | ||
|---|---|---|
| State: | single crystal | |
| Crystal structure: | bcc | |
| Production method: | Floating zone | |
| Standard size: | diameter 8-12mm thickness 1-2mm |
|
| Orientation: | (100), (110) and (111) | |
| Orientation accuracy: | <2°, <1°, <0.5° or <0.1° | |
| Polishing: | as cut, one or two sides polished | |
| Roughness of surface: | <0.03µm | |
| Purity: | 99.999% | |
| Typical analysis (ppm): | Ag < 0.10 Al 0.20 C 3.00 Ca 0.10 Cl 0.30 Co < 0.10 Cu < 0.10 Cr 0.15 Fe 0.60 H < 1.00 Mg 0.25 |
Mn < 0.10 Mo 4.00 N < 5.00 Na < 0.10 Ni 0.40 O 10.0 S 0.20 Si 0.70 Ta 1.00 V 0.50 Zr < 1.00 W balance |