Tribological behavior of Ti(C, N)-TiB2 composite cermets using FeCoCrNiAl high entropy alloys as binder over a wide range of temperatures

Ti(C, N)-TiB2 composite cermets with different binders (high entropy alloy (HEA) or Ni-Co) were fabricated by mechanical alloying and vacuum hot-pressing sintering. The wear resistance of the two at elevated temperatures was studied. Wear mechanism characterized a combination scanning electron microscopy energy dispersive spectroscopy. experimental results indicated that HEA binder possessed excellent comparing Ni-Co cermets. At lower temperatures, no obvious difference observed in worn surfaces Abrasive dominant mechanism. greater than 600 °C, oxidative adhesive found to be rate 11.8 %, 17 39.25 46.7 % 200 ℃, 400 800 respectively. enhanced performance N)-TiB2-HEA is attributed relatively high hardness toughness, as well high-temperature softening oxidation HEA.