Abstract
Zusammenfassung The reactions of carbon saturated vanadium carbide melt with carbons of different degrees of crystalline order (glasslike carbon, pyrolytic carbon, natural graphite) werestudied with emphasis on the effects of catalytic graphitization. Glasslike carbon is strongly attacked by the vanadium carbide melt and recrystallizes into well ordered graphite. Pyrolytic graphite is also transformed but much more slowly whereas natural graphite shows no reaction. The driving force is the difference in free enthalpy between disordered carbon and well ordered graphite. The precipitation of well ordered graphite occurring at equilibrium between melt and graphite (catalytic graphitization) can also be observed for other carbides and carbon saturated metal melts such as Fe-C, Ni-C, TiC/C and ZrC/C.
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