Effect of TiB2 content on the microstructure and mechanical properties of Ti(C,N)–TiB2–FeCoCrNiAl high-entropy alloys composite cermets
Source abstract
Abstract
Composite cermets with different mass ratios of Ti (C,N)/TiB2 and 10 wt % FeCoCrNiAl high-entropy alloys (HEAs) binder were fabricated by mechanical alloying and vacuum hot press sintering. The effect of the TiB2 content on the microstructure and mechanical properties of the Ti (C,N)–TiB2–HEAs cermets was systematically examined and is discussed in detail. The microstructure was analyzed by X-ray diffraction (XRD), scanning electron microscopy, and transmission electron microscopy (TEM). The results of this study show that a small amount of Fe2B phase was detected in the XRD patterns besides the Ti(C,N) and TiB2 phase. The TEM observation shows the presence of a HEAs binder phase, which was tightly bound to Ti(C,N) and TiB2 phases. The grain size of the composite cermets gradually decreased with increasing TiB2 content increased from 0 to 45 wt %. The relative density of the composite cermets first increased and then decreased with increasing TiB2 content from 11.25 to 45 wt %. When the TiB2 content reached 22.5 wt %, the composite cermets exhibited excellent comprehensive performance. The grain size, relative density, and hard phase of the composite cermets were the dominating factors that determined the mechanical properties with increasing TiB2 content. The relative density, Vickers hardness, bending strength, and fracture toughness of the Ti (C,N)–22.5 wt % TiB2–10 wt % HEAs composite cermets reached 98.86 ± 0.20%, 1954.4 ± 20 HV10, 727 ± 20 MPa, and 7.9 ± 0.1 MPa m1/2, respectively.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: High Entropy Alloys Studies · Advanced materials and composites · Orthopaedic implants and arthroplasty
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Materials Science and Engineering, Fujian University of Technology
Fujian Provincial Key Laboratory of New Material Preparation and Forming Technology
School of Materials Science and Engineering, Fuzhou University
References (43)
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