GEGENUEBER METALL- UND SALZSCHMELZEN RESISTENTE WERKSTOFFE, IHRE HERSTELLUNG UND DEREN VERWENDUNG.

摘要

A novel molten metal-and molten salt-resistant material comprises a composite of silicon nitride, silicon oxynitride, silicon dioxide and silicon. The material is produced by (a) suspending silicon powder in SiO2 sol to form a casting material; (b) moulding a workpiece from the material and hardening the material; and (c) converting the SiO2-bonded silicon, after demoulding, to silicon nitride and silicon oxynitride in a nitrogen atmos. such that SiO2 and elementary silicon remain in detectable amounts.