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  4. Joining and mechanical testing of oxide/oxide (NextelTM 610/alumina-zirconia) ceramic composites
 
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2019
Journal Article
Title

Joining and mechanical testing of oxide/oxide (NextelTM 610/alumina-zirconia) ceramic composites

Abstract
Efficient joining materials and techniques are of critical importance for the integration of CMCs in high performance structures. Continuous oxide fiber Nextel TM 610/alumina-zirconia composites were successfully joined to themselves by using a novel glass-ceramic based on the SiO 2 -CaO-Al 2 O 3 -MgO-Y 2 O 3 -ZrO 2 system. Crystallization kinetic of the novel glass-ceramic was studied using Matusita, Sakka and Ozawa equations. Single lap off-set shear tests and four-point bending tests were performed at room temperature and at 850 °C to investigate the mechanical strength of the joints. Thermal ageing was performed at 850 °C for 100 h in air to check the thermal stability of the joined components. The results showed that the joints were oxidation resistant and the joined interfaces were well bonded. Single lap off-set shear tests on joined samples resulted in delamination of the composites. The average flexural strengths of the joined samples were 71 MPa and 81 MPa, at room temperature and at 850 °C, respectively.
Author(s)
Akram, Muhammad Yasir
Politecnico di Torino
Casalegno, Valentina
Politecnico di Torino
Ferraris, Monica
Politecnico di Torino
Puchas, Georg
Universität Bayreuth
Krenkel, Walter
Universität Bayreuth
Roszeitis, Sven
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS  
Journal
Journal of the European Ceramic Society  
DOI
10.1016/j.jeurceramsoc.2019.02.020
Language
English
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS  
Keyword(s)
  • alumina oxide / oxide

  • glass ceramic

  • joining

  • Nextel TM 610

  • ceramic composite

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