Abstract
Based on the different sensitivities of material properties to temperature between ultrahigh temperature ceramics (UHTCs) and traditional ceramics, the original empirical formula of temperature-dependent Young's modulus of ceramic materials is unable to describe the temperature dependence of Young's modulus of UHTCs which are used as thermal protection materials. In this paper, a characterization applied to Young's modulus of UHTC materials under high temperature which is revised from the original empirical formula is established. The applicable temperature range of the characterization extends to the higher temperature zone. This study will provide a basis for the characterization for strength and fracture toughness of UHTC materials and provide theoretical bases and technical reserves for the UHTC materials' design and application in the field of spacecraft.
Highlights
Ultrahigh temperature ceramics (UHTCs) is a family of materials that have melting points higher than 3000◦C and can be potentially used at temperatures above 2000◦C in an oxidizing environment [1, 2]. They are possible aircraft thermal protection materials that can meet the requirements of thermal protection of hypersonic aircraft
The study will provide a basis for characterization for thermodynamic properties of UHTC materials
This study will provide a basis for characterization for thermodynamic properties of UHTC materials
Summary
Ultrahigh temperature ceramics (UHTCs) is a family of materials that have melting points higher than 3000◦C and can be potentially used at temperatures above 2000◦C in an oxidizing environment [1, 2]. They are possible aircraft thermal protection materials that can meet the requirements of thermal protection of hypersonic aircraft. The hypersonic aircraft is an advanced and strategic technology in the field of aerospace With their sharp nose-cones and leading edges, as well as extended exposure to the atmosphere during long flights, these aircrafts suffer from serious aerodynamic heating. The study will provide a basis for characterization for thermodynamic properties of UHTC materials
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