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Ultra-High Temperature Thermal Protection and Insulation Composites

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Composites".

Deadline for manuscript submissions: closed (10 July 2022) | Viewed by 2164

Special Issue Editor

Science and Technology on Advanced Composites in Special Environment Laboratory, School of Astronautics, Harbin Institute of Technology, Harbin 150001, China
Interests: ultra-high temperature composites; thermal protection composites; thermal insulation composites; ceramic-matrix composites; ablation property
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Thermal protection material which combines lightweight, non-ablation, thermal insulation, and reliability is the core technology for the development of space vehicles. However, the low-usage temperature of traditional thermal insulation materials limited the application of aircraft in ultra-high temperature environments above 1700°C. Therefore, new ultra-high temperature thermal protection materials have become a hot spot for research in various countries.

TUFROC used in the X-37B aircraft represents the current trend of ultra-high temperature thermal protection and insulation composites. To date, numerous efforts for ultra-high temperature thermal protection and insulation composites have been made to meet higher temperature resistance, durability, and reliability requirements of materials.

The Special Issue “Ultra-High Temperature Thermal Protection and Insulation Composites” aims to collect the most recent achievements in ultra-high temperature thermal protection materials, which forecast important advances in novel thermal insulation materials. Manuscript and review papers will summarize the issues that exist in the current material system as well as their solutions. Both review and research articles are welcome.

Dr. Shun Dong
Guest Editor

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Keywords

  • Ultra-high temperature composites
  • Thermal protection composites
  • Thermal insulation composites
  • Ceramic-matrix composites
  • Ablation property

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Published Papers (1 paper)

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Research

16 pages, 3682 KiB  
Article
Phase Evaluation, Mechanical Properties and Thermal Behavior of Hot-Pressed LC-YSZ Composites for TBC Applications
by Milan Parchovianský, Ivana Parchovianská, Ondrej Hanzel, Zuzana Netriová and Amirhossein Pakseresht
Materials 2022, 15(8), 2839; https://doi.org/10.3390/ma15082839 - 12 Apr 2022
Cited by 6 | Viewed by 1588
Abstract
In this work, La2Ce2O7-yttria-stabilized zirconia (LC-YSZ) composites with different weight fractions of YSZ (40–70 wt.%) were prepared by hot pressing at 1400 °C and investigated as a material for thermal barrier-coating (TBC) applications. For this purpose, the [...] Read more.
In this work, La2Ce2O7-yttria-stabilized zirconia (LC-YSZ) composites with different weight fractions of YSZ (40–70 wt.%) were prepared by hot pressing at 1400 °C and investigated as a material for thermal barrier-coating (TBC) applications. For this purpose, the effect of YSZ addition on the phase composition, microstructure, mechanical performance and thermal behavior was studied. X-ray diffraction analysis showed that the LC-YSZ composites were mainly composed of a cubic ZrO2 and La2O3-CeO2-ZrO2 solid solution with a pyrochlore structure, indicating that the reaction between LC and YSZ took place during hot pressing. Scanning electron microscopy revealed the high microstructural stability of the prepared composites, as the pore formation was significantly controlled and a high relative density (>97%) was obtained. The microstructure of LC-YSZ bulk samples was relatively fine-grained, with an average grain size below or very close to 1 µm. YSZ doping improved the Vickers hardness of the LC-YSZ composites; the highest hardness, with value of 12 ± 0.62 GPa, was achieved for the composite containing 70 wt.% of YSZ. The fracture toughness of LC-YSZ composites was in the range from 2.13 to 2.5 MPa·m1/2. No statistically significant difference in heat capacity or thermal conductivity was found between the composites with different content of YSZ. The results showed that LC-YSZ composites have relatively low thermal conductivities from room temperature (1.5–1.8 W·m−1·K−1) up to 1000 °C (2.5–3.0 W·m−1·K−1). This indicates that the prepared LC-YSZ composite materials are promising candidates for TBC applications. Full article
(This article belongs to the Special Issue Ultra-High Temperature Thermal Protection and Insulation Composites)
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