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Mechanical and microstructural characterisation of SiC- and SiBNC-fibre reinforced CMCs manufactured via PIP method before and after exposure to air

Klatt, Enrico and Frass, Alexander and Frieß, Martin and Koch, Dietmar and Voggenreiter, Heinz (2012) Mechanical and microstructural characterisation of SiC- and SiBNC-fibre reinforced CMCs manufactured via PIP method before and after exposure to air. Journal of the European Ceramic Society (32), pp. 3861-3874. DOI: 10.1016/j.jeurceramsoc.2012.05.028.

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Official URL: http://www.sciencedirect.com/science/article/pii/S0955221912003123

Abstract

Non-oxide CMCs based on pyc-coated SiC-fibres (Tyranno SA3) as well as novel amorphous ceramic fibres in the quaternary system Si–B–C–N (named SiBNC-fibres) were manufactured via polymer infiltration and pyrolysis process. Two different fibre architectures were applied: 0|90° unidirectional (UD) cross-ply and 0|90° plain weave fabric layer. UD cross-ply reinforced CMCs exhibit much more uniformly distributed filaments leading to better infiltration efficiency in resin transfer moulding process. Bending strength and fracture behaviour are strongly influenced by fibre architecture: UD cross-ply reinforced CMCs show higher bending strengths and less non-linear behaviour compared to plain weave fibre reinforcement. In tensile test there is no evidence of an influence of fibre architecture. Mechanical properties of unexposed SiC_pyc/SiCN and SiBNC_pyc/SiCN strongly correlate with fibre properties. After exposure to air (T = 1100 °C, 20 h), a significant decrease of mechanical properties could be observed, caused by complete oxidation of pyc-fibre coating interfered with silica formation.

Document Type:Article
Title:Mechanical and microstructural characterisation of SiC- and SiBNC-fibre reinforced CMCs manufactured via PIP method before and after exposure to air
Authors:
AuthorsInstitution or Email of Authors
Klatt, Enricoenrico.klatt@dlr.de
Frass, AlexanderUNSPECIFIED
Frieß, MartinUNSPECIFIED
Koch, DietmarUNSPECIFIED
Voggenreiter, HeinzUNSPECIFIED
Date:12 June 2012
Journal or Publication Title:Journal of the European Ceramic Society
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI:10.1016/j.jeurceramsoc.2012.05.028
Page Range:pp. 3861-3874
Status:Published
Keywords:Composites; Fibres; Interfaces; Mechanical properties; Fracture
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignement
DLR - Program:no assignment
DLR - Research theme (Project):other
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Ceramic Composite Structures
Deposited By: Enrico Klatt
Deposited On:23 Jul 2012 12:54
Last Modified:12 Dec 2013 21:41

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