The phase composition and physical properties of melt-quenched multicomponent alloy FeCoNiB0.7Si0.3Be
Abstract
The structure and physical properties of the high-entropy multicomponent alloy FeCoNiB0.7Si0.3Be in the as-cast and melt-quenched states were studied. The cooling rate of the melt-quenched films was estimated to be approximately 106 K/s based on the film thickness. X-ray analysis revealed a multiphase structure, including a BCC-type ordered phase (structural type B2) and intermetallic compounds (Fe, Ni, Co)2B. In melt-quenched samples, the fraction of the B2 phase increased, leading to a decrease in microhardness from 10400 MPa in the as-cast state to 8900 MPa in the melt-quenched state. Magnetic studies confirmed the ferromagnetic nature of the FeCoNiB0.7Si0.3Be alloy. The coercive field of melt-quenched samples (17500 A/m) was significantly higher than that of the as-cast ones (5200 A/m), which is attributed to structure refinement and an increased level of microstresses.
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