Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 38, Issue 4, Pages 1802-1811Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2017.11.026
Keywords
Oxide/oxide composites; Joining; Alumina fibres; YAG-ZrO2; Glass-ceramics
Categories
Funding
- Higher Education Commission Pakistan
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Alumina (Nexte (TM) 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 degrees C for brazing joints or 850 degrees C and 930 degrees 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.
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