![]() ![]() Creep in graphite is strongly dependent on the grain orientation (creep is defined as plastic flow under constant stress). Graphite displays extremely low creep at room temperature, its flow characteristics being comparable to those of concrete.In air, graphite is resistant to oxidation up to temperatures of about 750 K. Graphite does not melt but sublimes at about 3900 K.Reasonable cheap material in comparison to other material with similar corrosion resistance.Complicated parts with close tolerances can be machined with precision. Problem-free machining with standard machine tools: graphite can be machined easily.Low capture cross-section for neutrons.Corrosion resistance: oxidation resistance in air up to 500 C.Graphite is not wetted by the molten glass or by most molten metals.High thermal shock resistance: rapid heating or cooling is not a problem.Above this temperature, its strength falls (see graph). At 2700 K graphite has about double the strength it has when at room temperature. Unique mechanical strength: the tensile, compressive and flexural strength of graphite increases as temperature increases to 2700 K.Good thermal conductivity: outstanding heat transfer properties.As temperature rises, electrical conductivity increases. Near absolute zero, graphite has only a few free electrons and acts as an insulator. Good electrical conductivity: the temperature coefficient of electrical resistance of graphite is negative in a certain range of temperature, unlike that of metals. ![]()
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