Abstract
Chemical vapor deposited coatings of TiB2, TiC and boron on graphite substrates are being developed for application as limiter materials in magnetic confinement fusion reactors. In this application severe thermal shock conditions exist and to do effective thermo‐mechanical modelling of the material response it is necessary to acquire elastic moduli, fracture strength, and strain to fracture data for the coatings. Four point flexure tests have been conducted from room temperature to 2000 °C on TiB2 and boron coated graphite with coatings in tension and compression and the mechanical properties extracted from the load‐deflection data. In addition, stress relaxation tests from 500 ° to 1150 °C were performed on TiB2 and TiC coated graphite beams to assess the low levels of plastic deformation which occur in these coatings. Significant differences have been observed between the effective mechanical properties of the coatings and literature values of the bulk properties.
Sign-in/Register to access full text options 
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.
