Methods for the Characterization of Pyrolytically Deposited Carbon Characterization Procedures Applied at the Institute of Reactor Materials, Jülich

摘要

Pyrocarbon is deposited as a coating material of fuel kerhels use in High Temperature Gas Cooled Reactors. For the development of particle coatings specified for the various reactor designs it is necessary to know about the properties' of pyrocarbon and their changes by neutron irradiation.nIn this report procedures are described which are used in the In-stitut fur Reaktorwerkstoffe to characterize pyrocarbon. These procedures are: measurement of geometry, density, microporosity, apparent crystallite size, anisotropy of orientation, modulus of elasticity and strength of coatings, as well as ceramography, etching by oxydation, secondary, and transmission electron microscopy.