High temperature properties of the monolithic CVD beta-SiC materials joined with a pre-sintered MAX phase Ti3SiC2 interlayer via solid-state diffusion bonding

0480579 - ÚFM 2019 RIV GB eng J - Journal Article
Tatarko, P. - Chlup, Zdeněk - Mahajan, A. - Casalegno, V. - Saunders, T. G. - Dlouhý, Ivo - Reece, M. J.
High temperature properties of the monolithic CVD beta-SiC materials joined with a pre-sintered MAX phase Ti3SiC2 interlayer via solid-state diffusion bonding.
Journal of the European Ceramic Society. Roč. 37, č. 4 (2017), s. 1205-1216. ISSN 0955-2219. E-ISSN 1873-619X
Institutional support: RVO:68081723
Keywords : Diffusion joining * High temperature mechanical properties * MAX phase * SiC * Spark plasma sintering
OECD category: Ceramics
Impact factor: 3.794, year: 2017

Monolithic high purity CVD beta-SiC materials were successfully joined with a pre-sintered Ti 3 SiC 2 foil via solid-state diffusion bonding. The initial bending strength of the joints (~ 220 MPa) did not deteriorate at 1000 °C in vacuum, and the joints retained ~ 68 % of their initial strength at 1200 °C. Damage accumulation in the interlayer and some plastic deformation of the large Ti 3 SiC 2 grains were found after testing. The activation energy of the creep deformation in the temperature range of 1000 - 1200 °C in vacuum was ~ 521 kJmol -1 . During the creep, the linkage of a significant number of microcracks to form a major crack was observed in the interlayer. The Ti 3 SiC 2 interlayer did not decompose up to 1300 °C in vacuum. A mild and well-localized decomposition of Ti 3 SiC 2 to TiC x was found on the top surface of the interlayer after the bending test at 1400 °C in vacuum, while the inner part remained intact.
Permanent Link: http://hdl.handle.net/11104/0276435