Work

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

Year: 2021

Type: article

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

Source: Materials Today Communications

DOI: 10.1016/j.mtcomm.2021.102095

Authors: Zhanjiang Li, Peixin Fu, Chunfu Hong, Fa Chang, Pinqiang Dai

Institutions: Fuzhou University, Fujian University of Technology

Language: English

Topic: Advanced materials and composites

Subfield: Ceramics and Composites

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funder: National Natural Science Foundation of China

Award: G5120058797