Table of Contents
Physics Research International
Volume 2011 (2011), Article ID 791545, 3 pages
http://dx.doi.org/10.1155/2011/791545
Research Article

A Model of Temperature-Dependent Young's Modulus for Ultrahigh Temperature Ceramics

1College of Resource and Environmental Science, Chongqing University, Chongqing 400030, China
2LTCS and College of Engineering, Peking University, Beijing 100871, China

Received 27 September 2010; Accepted 2 January 2011

Academic Editor: Harold Zandvliet

Copyright © 2011 Weiguo Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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.