Abstract
Chromite formation was observed in experiments with a flash-heating hemispherical-implosion system, when a cylindrical steel sample holder, with stainless-steel plug, containing a graphite/iron mixture was compressed by the implosion. The formation of chromite was observed and verified by x-ray diffraction, scanning electron microscopy, and chemical microanalysis. The diffusion rates of Cr from the plug to the sample were as high as 102–103 cm2 s and growth rates of chromite crystals were as high as 0.3–0.4 ms−1. The foregoing could be inferred from the observations of the recovered specimens. Possible ways of chromite formation and the causes for the unusually high diffusion and crystal-growth rates are discussed.
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