Most silicon carbide
is man-made for use as an abrasive (when it is often
known by the trade name carborundum), or more recently
as a semiconductor and moissanite gemstones. The simplest
manufacturing process is to combine sand and carbon
at a high temperature, between 1600?C and 2500?C.
Purer product can be made by the more expensive process
of chemical vapor deposition. Its high melting point
(above 1600?C) makes it useful for bearings and furnace
parts. It is also highly inert.
Typical characteristics include:
Low
density
High
strength
Good
high temperature strength (Reaction bonded)
Oxidation
resistance (Reaction bonded)
Excellent
thermal shock resistance
High
hardness and wear resistance
Excellent
chemical resistance
Low
thermal expansion and high thermal conductivity
Electrical
conductivity
Typical applications include:
Abrasive
Seals,
bearings, pump vanes
Ball
valve parts
Wear
plates
Kiln
furniture
Heat
exchangers
Semiconductor
wafer processing equipment
Grit Size available 16, 24, 36, 46, 60, 80,100,120,150,180,
220, 280, 320, 400, 600, 800,1000
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