Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5440644 | Journal of the European Ceramic Society | 2017 | 12 Pages |
Abstract
Monolithic high purity CVD β-SiC materials were successfully joined with a pre-sintered Ti3SiC2 foil via solid-state diffusion bonding. The initial bending strength of the joints (â¼ 220 MPa) did not deteriorate at 1000 °C in vacuum, and the joints retained â¼ 68 % of their initial strength at 1200 °C. Damage accumulation in the interlayer and some plastic deformation of the large Ti3SiC2 grains were found after testing. The activation energy of the creep deformation in the temperature range of 1000 - 1200 °C in vacuum was â¼Â 521 kJmolâ1. During the creep, the linkage of a significant number of microcracks to form a major crack was observed in the interlayer. The Ti3SiC2 interlayer did not decompose up to 1300 °C in vacuum. A mild and well-localized decomposition of Ti3SiC2 to TiCx was found on the top surface of the interlayer after the bending test at 1400 °C in vacuum, while the inner part remained intact.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Peter Tatarko, ZdenÄk Chlup, Amit Mahajan, Valentina Casalegno, Theo G. Saunders, Ivo Dlouhý, Michael J. Reece,