Abstract
Ox/ox CMC based on Nextel 610™ fibers with 75 wt% alumina – 25 wt% zirconia matrix have been joined by a glass-ceramic and tested in creep in four-point bending (DIN EN 820–4) up to 50 h at 850 °C and 1000 °C, between 32 and 41 MPa. As a comparison, the creep limit of the non-joined ox/ox CMC was investigated in this range and also at higher temperatures and stresses. The creep experiments at 850 °C did not show any significant difference between joined and ox/ox CMC after 50 h, while a certain one was detected at 1000 °C on joined ox/ox CMC, suggesting that its creep mechanism is dominated by visco-elastic flow of the glass-ceramic.
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