Processing of C fibres Mg matrix composites via pre-infiltration with Al. A. Mertens, H.-M. Montrieux, J. Halleux, J. Lecomte-Beckers and F. Delannay. Euromat 2011, Montpellier. Outline. Introduction Experimental Procedure Results and Discussion Conclusions Prospects.
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A. Mertens, H.-M. Montrieux, J. Halleux, J. Lecomte-Beckers and F. Delannay
Euromat 2011, Montpellier
* [Rocher et al., 1989; Schamm et al., 1991; Margueritat-Regenet, 2002…]
C fibre pretreated with K2ZrF6
C yarn pre-infiltrated with Al
Small white precipitates result from the decomposition of K2ZrF6
High variability in tensile tests reinforcement?
UTS ranging from 28 to 78 MPa
E~9 GPaResults and Discussion (2)
Fibres pull out at the interface between AZ91D matrix and pre-infiltrated yarn
No extensive damage on the C fibre
The zone close to the interface is very disturbed (precipitates, porosities…)
Presence of an oxide layer on the pre-infiltrated yarn?
Reaction between that layer and Mg?
A few small areas are contaminated by an excess of precipitates resulting from the decomposition of K2ZrF6
No detectable oxides layer (SEM)