bei Google ScholarTitelangaben
Akram, Muhammad Yasir ; Ferraris, Monica ; Casalegno, Valentina ; Salvo, Milena ; Puchas, Georg ; Knohl, Stefan ; Krenkel, Walter:
Joining and testing of alumina fibre reinforced YAG-ZrO₂ matrix composites.
In: Journal of the European Ceramic Society.
Bd. 38
(2018)
Heft 4
.
- S. 1802-1811.
ISSN 0955-2219
DOI: https://doi.org/10.1016/j.jeurceramsoc.2017.11.026
Abstract
Alumina (Nextel™ 610) fibre reinforced YAG-ZrO₂ matrix composites were successfully joined by using different brazing alloys, metallic interlayers and a glass-ceramic. All joints were mechanically stable and free of cracks. Three commercial brazing alloys and a new alloy based on Ti/Cu/Al interlayers were selected to join these composites for applications in a non-oxidizing environment. A glass-ceramic based on SiO₂-Al₂O₃-CaO-MgO was developed in case the joined component needs to be oxidation resistant. To evaluate the thermal stability, all joined composites were aged up to 100 h in air at 550 °C for brazing joints or 850 °C and 930 °C for glass-ceramic joints. The mechanical strength was measured using single lap and four point bending tests before and after ageing. Four point bending tests on glass-ceramic joined samples showed an average joint strength of about 70 MPa which is 35% of as-received composites.