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Diamond-like carbon (DLC) is a class of amorphous carbon material that displays some of the typical properties of diamond. DLC is usually applied as coatings to other materials that could benefit from such properties. [1] DLC exists in seven different forms. [2] All seven contain significant amounts of sp 3 hybridized carbon atoms.
Diamond simulants and their gemological properties; Material Formula Refractive index(es) 589.3 nm Dispersion 431–687 nm Hardness (Mohs' scale) Density (g/cm 3) Thermal condc. State of the art Diamond: C: 2.417 0.044 10 3.52 Excellent Artificial simulants Flint glass: Silica with Pb, Al, Tl ~ 1.6 > 0.020 < 6 2.4–4.2 Poor 1700– White ...
Numbered clockwise from left bottom: (1) 2×2 mm initial; top row (2,3,4) irradiated by different doses of 2 MeV electrons; bottom right (5,6) irradiated by different doses and annealed at 800 °C. Sir William Crookes , a gem fancier as well as a chemist and physicist , was the first to discover radiation's effects on diamond color when in 1904 ...
Ultra-high temperature ceramic. Ultra-high-temperature ceramics (UHTCs) are a type of refractory ceramics that can withstand extremely high temperatures without degrading, often above 2,000 °C. [ 1 ] They also often have high thermal conductivities and are highly resistant to thermal shock, meaning they can withstand sudden and extreme changes ...
A superhard material is not necessarily "supertough". For example, the fracture toughness of diamond is about 7–10 MPa·m 1/2, [16] [17] which is high compared to other gemstones and ceramic materials, but poor compared to many metals and alloys – common steels and aluminium alloys have the toughness values at least 5 times higher. [18]
A laboratory-grown diamond (LGD), also called a lab-grown diamond, [ 1 ]laboratory-created, man-made, artisan-created, artificial, synthetic, or cultured diamond, is diamond that is produced in a controlled technological process (in contrast to naturally formed diamond, which is created through geological processes and obtained by mining).
Particle temperature and velocity for different thermal spraying processes [ 1 ] Thermal spraying techniques are coating processes in which melted (or heated) materials are sprayed onto a surface. The "feedstock" (coating precursor) is heated by electrical (plasma or arc) or chemical means (combustion flame). Thermal spraying can provide thick ...
Nikasil is short for nickel silicon carbide. Silicon carbide is a very hard ceramic (much harder than steel) that can be dissolved in nickel. The nickel silicon carbide solution can then be electroplated onto the aluminium cylinder bore. After the cylinders are plated, the Nikasil bores are diamond-honed to a plateau finish.
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