Limited Mechanical Property Data
Limited availability of mechanical property data like fracture toughness due to small sample sizes, hindering comprehensive property assessment and application development.
Simplified Computational Models
Reliance on simplified computational models for predicting formability, sacrificing accuracy for computational efficiency, may overlook crucial factors influencing stability.
Limited Multiphase Design Exploration
Scarcity of research on tuning properties through multiphase compositions and microstructures, which are crucial for many applications requiring balanced property profiles.
Limited Understanding of Thermal Expansion
Lack of in-depth understanding of the thermal expansion behavior of HECs and methods to tailor it for specific application requirements.
Balancing Properties for Cladding
Challenges in balancing irradiation resistance and thermal conductivity for cladding applications, needing further investigation and design strategies.
Brittle nature of some HECs, like high-entropy bixbyite-structured oxides, posing limitations for structural applications requiring high fracture toughness.
Oxidation Resistance Challenges
Limited data on high-temperature oxidation mechanisms and potential destabilization of solid solutions or formation of competing phases, necessitating careful composition design.
Thermal shock resistance as a concern for high-temperature applications, specifically the potential exacerbation due to glass-like low thermal conductivity.
Limited Research on HECs Fibers
Lack of research on HECs fibers despite their potential for high-temperature applications due to good strength, stability, and low thermal conductivity.
Limited Microstructure and Interface Engineering
Limited microstructure design and surface/interface modifications for enhancing performance in specific applications.