Updated: Jun 12, 2026

Fused Filament Fabrication (FFF) of Metal-Ceramic Components
Published on: January 11, 2019
Nan Qu1, Wentao Zhou1, Wei Zhang1
1School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
You might also read
Articles linked to this work by shared authors, journal, and citation graph.
Ultra-high-temperature ceramics (UHTCs) are materials used in extreme environments like aerospace and energy systems. These materials have high melting points and thermal stability but face challenges like brittleness and poor oxidation resistance. Recent research has introduced high-entropy UHTCs (HE-UHTCs), which use complex compositions to improve performance. HE-UHTCs benefit from effects like configurational entropy and lattice distortion, which enhance thermal stability and mechanical properties. Computational methods like DFT and MD help predict material behavior, while machine learning aids in composition screening. The review highlights the potential of HE-UHTCs but also notes the need for further experimental validation. Future work should focus on multiscale modeling and microstructural engineering to improve UHTC performance.
Area of Science:
Background:
Current materials face limitations in extreme environments like hypersonic flight or nuclear reactors. Traditional ceramics offer high thermal stability but suffer from brittleness and poor oxidation resistance. Researchers have long sought materials that maintain structural integrity at ultra-high temperatures. Prior studies have explored transition-metal compounds for aerospace applications. However, these materials often fail under prolonged thermal stress. The emergence of high-entropy materials has introduced new possibilities. These materials combine multiple elements to alter bonding and improve performance. Yet, the exact mechanisms remain unclear in many cases. This gap motivated the need to systematically evaluate UHTCs and HE-UHTCs. The goal is to identify how compositional complexity influences material behavior.
Purpose Of The Study:
This review aims to clarify how high-entropy UHTCs improve upon traditional UHTCs. The focus is on understanding the effects of configurational entropy and lattice distortion. The study also examines how computational tools like DFT and MD contribute to material design. A key objective is to compare mechanical and oxidation properties of conventional and HE-UHTCs. The authors seek to highlight the role of machine learning in property prediction. They also aim to identify unresolved challenges in UHTC engineering. The review is structured to guide future research directions. It provides a framework for evaluating the potential of HE-UHTCs in extreme environments.
The four effects are configurational entropy, lattice distortion, sluggish diffusion, and cocktail effects.
Machine learning aids in composition screening and property prediction for UHTCs.
Lattice distortion enhances oxidation resistance and mechanical performance in HE-UHTCs.
DFT calculations help understand bonding and electronic structure in UHTCs.
The cocktail effect combines multiple high-entropy mechanisms to improve performance.
08:29Multi-material Ceramic-Based Components – Additive Manufacturing of Black-and-white Zirconia Components by Thermoplastic 3D-Printing (CerAM - T3DP)
Published on: January 7, 2019
06:53Additive Manufacturing of Functionally Graded Ceramic Materials by Stereolithography
Published on: January 25, 2019
Main Methods:
The authors conducted a comprehensive literature review of UHTC crystal chemistry and mechanical behavior. They analyzed oxidation and ablation properties across multiple studies. The review includes a detailed discussion of high-entropy effects such as lattice distortion. Computational methods like DFT and MD are evaluated for their predictive capabilities. The study also incorporates data-driven approaches such as machine learning. These tools are assessed for their role in composition screening and property prediction. The authors synthesized findings from experimental, simulation, and data-driven studies. The review structure allows for a comparative analysis of conventional and HE-UHTCs.
Main Results:
High-entropy UHTCs show enhanced oxidation resistance compared to conventional UHTCs. Configurational entropy contributes to lattice distortion and sluggish diffusion effects. These effects improve thermal stability and mechanical performance. DFT calculations reveal bonding characteristics that influence material behavior. MD simulations help predict phase stability and diffusion rates. Machine learning models assist in identifying optimal compositions. The cocktail effect combines multiple high-entropy mechanisms for improved performance. The review highlights the need for further experimental validation of computational predictions.
Conclusions:
The review suggests that high-entropy UHTCs offer advantages over traditional ceramics. The four core effects—configurational entropy, lattice distortion, sluggish diffusion, and cocktail effects—are linked to improved properties. Computational tools like DFT and MD are valuable for composition screening. Machine learning may help accelerate the discovery of new UHTC compositions. However, experimental validation remains essential for confirming predictions. The authors propose that future work should focus on multiscale modeling approaches. They also suggest that microstructural engineering could enhance sinterability and oxidation resistance. The study emphasizes the need for continued research into HE-UHTC synthesis and performance.
The review suggests focusing on multiscale modeling and microstructural engineering.