Abstract
As material for structural components, isotropic pyrolytic graphite (IPG) is widely used in such objects of critical infrastructure as nuclear fission reactors. There is the possibility of using IPG as a facing material for experimental thermonuclear facilities; this is currently being explored. Also, IPG is used as a sealing and anti-friction material in the aerospace industry. It is shown that X-ray tomography is not very suitable for studying the internal structure of IPG produced by chemical vapor deposition because its density is much the same as that of heterogeneities encountered in IPG, such as carbon black inclusions and anisotropic pyrographite crystallites. Broadband ultrasonic spectroscopy has been used to detect pores and carbon deposited layers in IPG samples, 2D images of the internal structure produced.
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