Abstract
The glass formability of the Cr72 (B, Si, C)25Al3 system has been investigated. Samples were prepared by rapid quenching from the melt by the melt spinning technique. Of the compositions investigated, only Cr72B10C10Si5Al3 and Cr71 C17Si8Al3 formed fully amorphous alloys. These showed crystallization temperatures of 997 and 990 K, respectively, among the highest reported for transition metal-metalloid amorphous alloys. The crystallization products have been found to be Cr7C3 and Cr3(Si, B) for Cr72B10C10Si5Al3 and Cr7C3 and Cr3Si for Cr72C17Si8Al3. The effects of substituting iron in place of chromium in Cr72C17Si8AI3 have been investigated. For up to 20 at% Fe the crystallization products are (Cr, Fe)7C3 and Cr3Si. An alloy with 30 at% Fe crystallizes into (Cr, Fe)7C3 and hexagonal Cr-Si-C.
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