Abstract
In this work, new Fe20Co20Ni20CrxMo20-xP10B10 (x = 5, 10 and 15 at.%) high-entropy bulk metallic glasses (HE-BMGs) with the maximum diameter of 1.0–2.0 mm were prepared by combining fluxing treatment and J-quenching technique, and the effects of Cr/Mo content on thermal stability, mechanical properties, corrosion and wear resistances were systematically investigated. It is found that the glass transition temperature (Tg) and onset crystallization temperature (Tx) of the present transition-metal based HE-BMGs slightly decrease with the increase/decrease of Cr/Mo content. Compressive test shows that the compressive strength of the present transition-metal based HE-BMGs monotonously decrease from 3124 MPa for x = 5 to 2745 MPa for x = 15, but the compressive plasticity is nearly zero. Electrochemical measurements in 3.5 wt.% NaCl solution show that the corrosion resistance of the present transition-metal based HE-BMGs decrease with the increase/decrease of Cr/Mo content and the alloy with x = 15 exhibit the highest corrosion resistance with a self-corrosion current density of 1.02 × 10−8 A/cm2 among the present transition-metal based HE-BMGs. Wear test shows that, as the Cr/Mo content increases/decrease, the friction coefficient and wear rate of the present transition-based HE-BMGs decrease, i.e., wear resistance increases.
Published Version
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