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The hardness of synthetic diamond (70–150 GPa) is very dependent on the relative purity of the crystal itself. The more perfect the crystal structure, the harder the diamond becomes. It has been reported that HPHT single crystals and nanocrystalline diamond aggregates (aggregated diamond nanorods) can be harder than natural diamond. [25]
Naturally occurring tungsten consists of four stable isotopes (182 W, 183 W, 184 W, and 186 W) and one very long-lived radioisotope, 180 W. Theoretically, all five can decay into isotopes of element 72 by alpha emission, but only 180 W has been observed to do so, with a half-life of (1.8 ± 0.2) × 10 18 years; [36] [37] on average, this yields ...
The constitute particle of the Thaum, akin to the real-life quark. Its name literally means "thing-ies". It comes in 5 "flavors" or types: Up, Down, Sideways, Sex-Appeal and Peppermint. [109] Tachyon: Many examples; see Tachyons in fiction: A tachyon is anything that travels faster than light.
In diamond, all the carbon-to-carbon bonds, both within a layer of rings and between them, are in the staggered conformation, thus causing all four cubic-diagonal directions to be equivalent; whereas in lonsdaleite the bonds between layers are in the eclipsed conformation, which defines the axis of hexagonal symmetry.
Scheelite is a calcium tungstate mineral with the chemical formula Ca W O 4.It is an important ore of tungsten (wolfram). Scheelite is originally named after Swedish chemist Carl Wilhelm Scheele (1742–1786).
Except for testing thin materials in accordance with A623, the steel indenter balls have been replaced by tungsten carbide balls of the varying diameters. When a ball indenter is used, the letter "W" is used to indicate a tungsten carbide ball was used, and the letter "S" indicates the use of a steel ball. E.g.: 70 HRBW indicates the reading ...
Engineers from the University of Manchester say their concrete is twice as strong as conventional concrete. The secret ingredient? Potato starch.
The numbers refer to the average dimensions in micrometres of the starting diamond material. The designation CTB indicates standard Polycrystalline diamond (PCD) products, whereas CTC and CTH indicate modified PCD grades. Syndite CTB010 may, in most cases, be regarded as the general-purpose grade.