Joining and testing of alumina fibre reinforced YAG-ZrO2 matrix composites. Issue 4 (April 2018)

• Record Type: Journal Article
• Authors: Akram, Muhammad Yasir; Ferraris, Monica; Casalegno, Valentina; Salvo, Milena; Puchas, Georg; Knohl, Stefan; Krenkel, Walter
• Is Part Of: Journal of the European Ceramic Society. Volume 38:Issue 4(2018)
• Page Start: 1802
• Page End: 1811
• Publication Date: 2018-04
• Subjects: Oxide/oxide composites -- Joining -- Alumina fibres -- YAG-ZrO2 -- Glass-ceramics; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2017.11.026
• Languages: English
• ISSNs: 0955-2219

Abstract

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 -Al2 O3 -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.