Mechanical and Functional Properties of Refractory Metal-Ceramic Composites Used in Advanced High-Temperature Applications

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Matrix Composites".

Deadline for manuscript submissions: 10 February 2025 | Viewed by 2471

Special Issue Editors


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Guest Editor
Institute of Ceramics, Refractories and Composite Materials,Technische Universität Bergakademie Freiberg, 09599 Freiberg, Germany
Interests: classical ceramic refractories; refractory metal composites; carbides including MAX phases; thermodynamics; interface reactions
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Institute of Ceramics, Refractories and Composite Materials,Technische Universität Bergakademie Freiberg, 09599 Freiberg, Germany
Interests: classical ceramic refractories; refractory metal composites; carbides including MAX phases; thermodynamics: interface reactions

Special Issue Information

Dear Colleagues,

The refractory world is changing as a result of the need to reduce carbon footprints and to support climate-positive industries. Advanced refractory materials based on functionalised metal–ceramic composites can help to fulfil the demand for smart refractory installations with increased lifetimes. In addition, the material design must satisfy circular economy needs.

In all cases, composites must withstand harsh environments in their application such as corrosion (contact with metallic and salt melts, reducing or oxidising atmospheres), thermal shock, thermal stresses and mechanical loads.

This Special Issue encourages authors to contribute works on topics including, but not limited to, the following:

  • Design and production of metal–ceramic composites used at temperatures above 1000 °C;
  • Functional properties, e.g., electrical and thermal conductivity, porosity, etc.;
  • Mechanical properties, e.g., characterisation of thermal shock behaviour, strength at RT and high temperature, etc.;
  • Oxidation or corrosion resistance of functional materials and/or composites.

Studies on any high-temperature material class, including classical ceramic refractories, refractory metal composites, and carbides (including MAX phases), are welcome for submission.

Dr. Tilo Zienert
Prof. Dr. Christos G. Aneziris
Guest Editors

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Keywords

  • thermal shock
  • thermal stresses
  • mechanical loads
  • corrosion
  • classical ceramic refractories
  • refractory metal composites
  • carbides
  • thermodynamics
  • interface reactions

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Published Papers (2 papers)

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Research

13 pages, 3464 KiB  
Article
Influence of Ceramic Size and Morphology on Interface Bonding Properties of TWIP Steel Matrix Composites Produced by Lost-Foam Casting
by Guojin Sun, Xiaoming Liu, Zhenggui Li and Qi Wang
Metals 2024, 14(9), 1003; https://doi.org/10.3390/met14091003 - 2 Sep 2024
Viewed by 667
Abstract
This study investigated the fabrication and characterization of large ceramic-reinforced TWIP (twinning-induced plasticity) steel matrix composites using the lost-foam casting technique. Various ceramic shapes and sizes, including blocky, flaky, rod-like, and granular forms, were evaluated for their suitability as reinforcement materials. The study [...] Read more.
This study investigated the fabrication and characterization of large ceramic-reinforced TWIP (twinning-induced plasticity) steel matrix composites using the lost-foam casting technique. Various ceramic shapes and sizes, including blocky, flaky, rod-like, and granular forms, were evaluated for their suitability as reinforcement materials. The study found that rod-like and granular ceramics exhibited superior structural integrity and formed strong interfacial bonds with the TWIP steel matrix compared to blocky and flaky ceramics, which suffered from cracking and fragmentation. Detailed microstructural analysis using scanning electron microscopy (SEM) and industrial computed tomography (CT) revealed the mechanisms influencing the composite formation. The results demonstrated that rod-like and granular ceramics are better for reinforcing TWIP steel composites, providing excellent mechanical stability and enhanced performance. This work contributes to the development of advanced composite structures with potential applications in industries requiring high-strength and durable materials. Full article
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15 pages, 16225 KiB  
Article
The Influence of Yttrium Content and Ceramic Crucible Materials on Desulfurization during Vacuum Induction Melting of DD5 Superalloys
by Fuwei Wang, Ying Cheng, Shoubin Zhang, Rui Zhang, Yanyun Sun, Kai Guan, Huarui Zhang and Hu Zhang
Metals 2024, 14(3), 353; https://doi.org/10.3390/met14030353 - 19 Mar 2024
Viewed by 1255
Abstract
In this study, the effect of adding different contents of yttrium (Y) during vacuum induction melting in Al2O3 and Y2O3 crucibles on the purification of DD5 alloys was investigated. The results show that the Y2O [...] Read more.
In this study, the effect of adding different contents of yttrium (Y) during vacuum induction melting in Al2O3 and Y2O3 crucibles on the purification of DD5 alloys was investigated. The results show that the Y2O3 crucible exhibited great crucible stability and an excellent desulfurization effect when melting a Y-containing DD5 alloy. The S content of the alloy was reduced from 5.03 ppm to 1.36 ppm with the addition of 0.50 wt.% Y. Element Y combined with free S in the melt to form the YS phase, which was removed from the condensate shell and slag during the vacuum induction melting (VIM) process. Meanwhile, when the alloy was melted in the Y2O3 crucible with 0.50 wt.% Y addition, there was a reduction in S content from 2.77 ppm to 1.36 ppm compared to the Al2O3 crucible. Additionally, the loss of Y decreased from 0.12 wt.% to 0.05 wt.%. Full article
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