It is shown that the rheology of a silazane-based precursor for a silicon carbonitride ceramic can be radically altered by reacting it with an alkoxide precursor. This modified precursor can be drawn into fibres by a simple process. The fibre-friendly rheology of the modified precursor is ascribed to the creation of linear polymer chains by a reaction between silazanes and alkoxides. The ceramic fibres made by this process have excellent mechanical properties, reaching tensile strengths of 2.8 GPa. Their structure is amorphous.
Origin
University Of Colerado, Usa
Journal Title
J Am Ceram Soc 86 8 2003 1443-1445
Sector
Glass Fibre
Class
GF 370