Abstract
The equation of state (pressure-volume relationship) of a monolithic SiC composite has been determined separately by high pressure ultrasonic and x-ray techniques. The ultrasonic measurements were performed on a cylindrical specimen, 2.2 mm in diameter and 2.2 mm in length, in a large-volume uniaxial split cylinder press to 13.6 GPa. The synchrotron measurements were carried out on the polycrystalline sample loaded in a diamond anvil cell up to a pressure of 27 GPa. The room temperature bulk modulus obtained from the ultrasonic measurements is K0=216.5±1.1 GPa and the pressure derivative is K0′=4.19±0.09. The shear modulus obtained is G0=196.7±0.7 GPa with its pressure derivative G0′=0.95±0.03. Using K0′ obtained from the ultrasonic measurements in the Birch–Murnaghan equation to fit the synchrotron x-ray data, we obtain a bulk modulus of K0=218.4±4.9 GPa for the composite.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
