Fabrication of ceramics/high-entropy alloys gradient composites by combustion synthesis in ultra-high gravity field

Abstract

The gradient ceramic/metal composite of TiC-TiB2/Al0.3CoCrFeNi was prepared by combustion synthesis under ultra-high gravity field. Right after the formation of the mixture by combustion, the ceramics and metals are separated in an ultra-gravity field due to the difference in mass density, resulted in a gradient distribution of ceramics (TiC-TiB2) along the gravitational field in the high-entropy alloy (Al0.3CoCrFeNi) matrix. The hardness of the material shows a significant gradient change.