A Multi-Scale Approach of Degradation Mechanisms inside a SiC(f)/Si–B–C(m) Based Self-Healing Matrix Composite in a Dry Oxidizing Environment

Florence Nualas (1) , Francis Rebillat (1)

1 LCTS - Laboratoire des Composites Thermostructuraux

Ceramic matrix composites are potential candidate to replace the nickel-based alloys in advanced aeronautic engines as in civilian ones. The durability of a SiC(f)/PyC(i)/Si-B-C(m) with a sequenced self-healing matrix and Nicalon fibers was investigated at low temperature. To better understand degradation mechanisms inside this composite, a multi-scale approach was chosen. Firstly, the oxidation behaviors of Nicalon fibers and the B 4 C phase was studied under dry air at 550°C. Respectively, the whole composite was aged in similar oxidizing conditions. Correlation between these two levels leads to get an accurate description of degradation mechanisms inside a composite material and to evaluate the efficiency of the self-sealing process.

Mots clés: oxidation; composite; Nicalon; boron oxide

Domaines: Matériaux

Florence Nualas, Francis Rebillat. A Multi-Scale Approach of Degradation Mechanisms inside a SiC(f)/Si–B–C(m) Based Self-Healing Matrix Composite in a Dry Oxidizing Environment. Oxidation of Metals, 2013, 80 (3-4), pp.279 - 287. ⟨10.1007/s11085-013-9385-z⟩. ⟨hal-01629901⟩