Evaluation of Impact Bending Strength of Ceramic Composites at Ultra-High Temperatures from 1500-2000 °C in Air

Abstract:

In this work, a new and novel test method was developed to determine the impact bending strength of ceramic composites at ultra-high temperature from 1500-2000 °C in air. Three-point impact bending test was carried out through a SiC pressure head with a dynamic force sensor fixed on a slider and movable along a guide rail. The impact load was adjusted by different saving energy and the impact speed was lower than 0.5 m/s. The center of the sample was heated up to about 1500-2000°C by oxygen-assisted spray combustion. An impact load was put on the specimen and the impact force was recorded automatically. The impact bending strength can be calculated from the maximal load and the sample size. To check the availability and reliability for this method, several ceramics including SiC, ZrB₂/SiC and C/C fiber reinforced composite without coating, were used as the testing samples. The results indicate that this method is a good and feasible method for evaluating the mechanical properties of the ceramic composite at ultra-high temperatures.

• Periodical: Key Engineering Materials (Volume 591)
• Pages: 145-149
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.591.145
• Online since: November 2013
• Authors: De Tian Wan, Yi Wang Bao, Hua Zhao, Yuan Tian
• Keywords: C/C, Impact Bending Strength, Ultra-High Temperature Mechanical Properties, ZrB₂/SiC

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