Measurements of elastic and anelastic properties of reaction-formed silicon carbide ceramics

1573-4803

Springer Online Journal Archives 1860-2000

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Abstract The piezoelectric ultrasonic composite oscillator technique (PUCOT) was used to measure dynamic Young's modulus, damping, strain amplitude, and the strain-amplitude dependence of damping on three reaction-formed silicon carbide (RFSC) specimens. The data were compared with results found on NC 203 SiC. The temperatures used to conduct the tests ranged from 595–1049°C, and this information complemented data collected earlier. The main results are as follows: the modulus for RFSC specimens decreases with increasing temperature over a range of approximately 350–260 GPa from room temperature to 1049°C, the modulus for NC203 ranges from 450–415 GPa over the same temperature range, and damping of RFSCs is independent of strain amplitude and has little temperature dependence.

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