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The reported Vickers and Knoop hardnesses were intermediate between diamond and c-BN, making the new phase the second hardest known material. [39] Ternary B–C–N phases can also be made using shock-compression synthesis. It was further suggested to extend the B–C–N system to quaternary compounds with silicon included. [9] [40]
A custom resin cast Pinky:St part and two-part silicone mold. Resin casting is used to produce collectible and customized toys and figures like designer toys, garage kits and ball-jointed dolls, as well as scale models, either individual parts or entire models of objects like trains, aircraft or ships.
Left: individual linear polymer chains Right: Polymer chains which have been cross linked to give a rigid 3D thermoset polymer. In materials science, a thermosetting polymer, often called a thermoset, is a polymer that is obtained by irreversibly hardening ("curing") a soft solid or viscous liquid prepolymer (). [1]
The Bakelite Company produced "transparent" cast resin (which did not include filler) for a small market during the 1910s and 1920s. [ 15 ] : 172–174 Blocks or rods of cast resin, also known as "artificial amber", were machined and carved to create items such as pipe stems , cigarette holders , and jewelry .
In the 1930s, jewelry made in these colors was popular with sets of beads, bangles, earrings, and rings being worn together. Emerson Model 400-3 "Patriot" (1940) radio, made of Catalin. Catalin was also used to make radios. In a labor-intensive process, liquid resin was cast and cured with heat, and then polished by hand into Art Deco designs.
It is one of the hardest known materials, along with various forms of diamond and other kinds of boron nitride. Borazon is a crystal created by heating equal quantities of boron and nitrogen at temperatures greater than 1800 °C (3300 °F) at 7 GPa (1 million lbf/in 2 ).