Stress recrystallization of graphite

Abstract

Conditions are recorded under which specimens of graphite deposited from pyrolysis of methane are found to incorporate large strain energy. Methods of relieving strains by annealing have been investigated. Recrystallization under suitable constraint can be made to yield graphite of high crystal perfection. Observations indicate that such recrystallization is a co-operative process, which we have termed ‘stress-recrystallization’. It is very rapid at 2700 °C and can become uncontrollable.