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.
Joining and testing of alumina fibre reinforced YAG-ZrO2matrix composites / Akram, MUHAMMAD YASIR; Ferraris, Monica; Casalegno, Valentina; Salvo, Milena; Puchas, Georg; Knohl, Stefan; Krenkel, Walter. - In: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY. - ISSN 0955-2219. - 38(2018), pp. 1802-1811. [10.1016/j.jeurceramsoc.2017.11.026]
|Titolo:||Joining and testing of alumina fibre reinforced YAG-ZrO2matrix composites|
|Data di pubblicazione:||2018|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.jeurceramsoc.2017.11.026|
|Appare nelle tipologie:||1.1 Articolo in rivista|
File in questo prodotto: