Hostname: page-component-77c89778f8-5wvtr Total loading time: 0 Render date: 2024-07-19T08:18:06.581Z Has data issue: false hasContentIssue false
  • English
  • Français

Strong Interface in CMCs, a Condition for Efficient Multilayered Interphases

Published online by Cambridge University Press:  15 February 2011

Christine Droillard ,
Jacques Lamon  and
Xavier Bourrat
Christine Droillard
Affiliation:
Laboratoire des Composites Thermostructuraux, Université de Bordeaux, Pessac, France
Jacques Lamon
Affiliation:
Laboratoire des Composites Thermostructuraux, Université de Bordeaux, Pessac, France
Xavier Bourrat
Affiliation:
Laboratoire des Composites Thermostructuraux, Université de Bordeaux, Pessac, France
Get access

Abstract

A fiber treatment was used to change the bonding strength of the Nicalon NLM 202 SiC fiber from weak to strong, in a series of 2D-SiC/SiC composites with multilayered interphases. The materials with the pre-treated fibers were compared to the same materials but reinforced with as received fibers. The stress-strain behavior and the fracture toughness were examined as a function of crack patterns identified by TEM. All the materials could be grouped into two distinct families: (i) materials reinforced with untreated fibers have a weak fiber bonding and are characterized by a low strength and a low toughness and (2) materials with the pre-treated fibers have a strong fiber bonding and are characterized by a high strength and a high toughness. This latter behavior is identified by TEM. It corresponds to a new interfacial behavior with a cohesive mode of interfacial cracking, involving branching and deflection by the successive interfaces. In the former family, the adhesive interfacial failure mode corresponds to the classical debond/sliding mechanism.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 365: Symposium M – Ceramic Matrix Composites–Advanced High-Temperature Structural Materials , 1994 , 371
Copyright
Copyright © Materials Research Society 1995

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Evans, A.G., J. Am. Ceram. Soc., 73 (1990) 187–206.Google Scholar
2 Kerans, R.J., Hay, R.S., Pagano, J. and Parthasarathy, T.A., Ceramic Bulletin, 68 [2] (1989) 429–442.Google Scholar
3proprietary treatment performed by SEP Bordeaux, France.Google Scholar
4 Naslain, R. and Langlais, F., in “Tailoring Multiphase and Composite Ceramics” (Tressler, R.E., Messing, G.L., Pantano, C.G. and Newnham, R.E., eds.), Mater. Sci. Res., 20 (1986) 145–164, Plenum Press, New York.Google Scholar
5 Naslain, R., in “Ceramic-Matrix Composites” (Warren, R., ed.), chap. 8, pp. 199–244, Blackie, Glasgow and London, 1992.Google Scholar
6 Lamon, J., Rebillat, F. and Evans, A.G., J. Am. Ceram. Soc., in press.Google Scholar
7 Droillard, C., Lamon, J., to be published in J. Am. Ceram. Soc.Google Scholar
8 Droillard, C., Voisard, P., Heibst, C. and Lamon, J., J. Am. Ceram. Soc.Google Scholar