Abstract
Two boride layers based on the FeB and Fe2B compounds are formed at the interface between an Fe–15Cr alloy and boron at 850–950°C and reaction times up to 12 h, with the average chromium content being around 8 at-% in the former and 12 at-% in the latter. Both boride layers reveal a pronounced texture. Diffusional growth kinetics of the layers are close to parabolic and can alternatively be described by a system of two non-linear differential equations. Microhardness values are 17·4 GPa for the FeB layer, 14·4 GPa for the Fe2B layer and 0·95 GPa for the Fe–15Cr alloy base. The dry abrasive wear resistance of borided alloy samples is around 45 times greater than that of non-borided ones.
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