Abstract
The thermal expansion of molybdenum-chromium M 2C carbides has been studied over the temperature range from room temperature to 900°C using high-temperature X-ray diffraction. Hyperstoichiometric carbides demonstrated hysteretic thermal expansion/contraction as excess carbon was lost upon heating above 750°C in an inert environment. Coefficients of thermal expansion of both the a and c axes increase linearly with chromium content.
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