The material like graphite improve its strength, while other material like metal or alloy may deform easily. I want to know that how the material micro-structural properties changes to improve the strength while enhancing the temperature.
According to my perception, Graphite oxidize above 600c, but its melting temperature is about 3200C. if you want to stabilize graphite add stabilizer like SiC, BrN etc. This antioxidant helps in prevention of graphitic oxidation.
The properties are improved because graphitisation proceeds at very high temperature, producing a more and more ordered crystalline structure with less and less structural defects and less and less heteroelements. The graphite crystal becoming more and more perfect, its properties are enhanced.
Alain
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