Structure and mechanical properties of high-entropy carbide (Ti0.2Zr0.2Nb0.2Ta0.2Cr0.2)C: Effect of sintering method
Source abstract
Abstract
High-entropy carbide ceramics (HECCs) have attracted increasing attention for extreme-environmental applications due to their unique multi-elemental compositions and outstanding mechanical properties. While most existing studies focus on IVB and VB transition metals synthesized via spark plasma sintering (SPS), group VIB elements, such as Cr, have been comparatively less studied. In this study, a Cr-containing HECC, (Ti0.2Zr0.2Nb0.2Ta0.2Cr0.2)C, was synthesized via both high temperature and high pressure (HTHP) sintering and SPS. Comparative analysis revealed that HTHP processing at 5 GPa and 1600 °C produced ultrafine grains (∼0.41 μm), moderate density (94.2%), and enhanced fracture toughness (5.05 ± 0.37 MPa m1/2). In contrast, SPS at 1800 °C yielded near-theoretical density (99.4%) and higher nanohardness (34.15 ± 0.51 GPa) but resulted in significant grain coarsening (∼6.24 μm) and reduced fracture toughness (∼3.5 MPa m1/2). These findings highlight the distinct structure–property relationships governed by the sintering route and provide insights into tailoring HECC performance for demanding service conditions.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: High Entropy Alloys Studies · Advanced materials and composites · High-Temperature Coating Behaviors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Physical Scientific and Technology, Institute of High Pressure Physics, Ningbo University , Ningbo 315211,
Funding
National Key Research and Development Program of China · National Natural Science Foundation of China · Program for Science and Technology Innovation Team in Zhejiang
References (26)
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