Influence Of Loading Rate And Processing Atmosphere On Pullout Of Sic Fibres From Pyrex Glass

The interfacial shear strength of SiC glass composites fabricated either under vacuum or in argon gas by hot-pressing was estimated using a single-fibre pullout test as a function of the loading rate. The interfacial shear strength of the composite fabricated under vacuum depended insignificantly on the loading rate. On the contrary, for the composite fabricated in argon gas, loading rates strongly influenced the interfacial shear strength as well as the interfacial debonding behaviour. The influence of loading rates on the interfacial shear strength in the latter composite could result from the presence of the Si-O bond, whose strength is affected by slow crack growth along the fibre-matrix interface.