Polymer derived nitride matrix composites reinforced by 2·5-dimensional silica fibre

Authors: Jiang, Y. G.; Zhang, C. R.; Cao, F.; Wang, S. Q.; Qi, G. J.; Cao, Y. B.

Source: Materials Science and Technology, Volume 23, Number 7, July 2007 , pp. 880-882(3)

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Abstract:

Polyborosilazane, a low viscosity preceramic polymer with good infiltration efficiency and high char yield, was used to prepare amorphous composites with polymer derived nitride matrix reinforced by 2·5-dimentional silica fibre, and the mechanical properties and microstructures were investigated. The composites without fibre coating showed typical brittle fracture behaviour with a smooth fracture surface and a longitude flexural strength of just 46·3 MPa whereas the composites with fibre coating exhibited non-brittle fracture behaviour with distinct fibre pull-out on the fracture surface and a high longitude flexural strength of 129·5 MPa. It was the controlled fibre/matrix interface by precoating treatment that contributed to the high mechanical property of the composites.

Keywords: PRECOATING; MECHANICAL PROPERTIES; POLYMER DERIVED; SILICA FIBRE; MICROSTRUCTURES

Document Type: Short Communication

DOI: http://dx.doi.org/10.1179/174328407X185875

Publication date: 2007-07-01

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