Obtaining complex‐shaped oxide ceramic composites via ionotropic gelation
Date Issued
2018-08-23
Abstract
In this communication, we present a new processing method for obtaining oxide ceramic composites based on the ionotropic gelation technique. Nextel 610 fiber fabrics were infiltrated by an alumina-zirconia suspension with a total solid content of 50 vol.% and alginate as the binder. Subsequently, the suspension was slowly cross-linked by adding Al3+ cations and transferred to a gel state. The gelled fabric layers could be easily cut, stacked and shaped, as well as joined to other ceramic materials and composites. Furthermore, the fiber content could be adjusted by pressing the layers together. In summary, the composites produced with this technique presented a very good fiber bundle infiltration, matrix with fine porosity and excellent mechanical properties. Nextel 610/alumina-zirconia composites sintered at 1200°C for 1 h showed bending strength of 306 MPa, interlaminar shear strength of 9.8 MPa and nominal fracture toughness of 13.6 MPa m0.5.
Subjects
oxide ceramic composites
;
ionotropic gelation technique
;
fiber bundle infiltration
;
interlaminar shear strength
;
nominal fracture toughness
;
Mimenima
Publisher
Wiley
Institution
Type
journal article
Journal/Edited collection
Band
102
Issue
1
Start page
53
End page
57
Secondary publication
Yes
Document version
Postprint
License
Alle Rechte vorbehalten
Language
English
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