High Alumina and Mullite Fibre for Extreme Temperatures
topic
High alumina fibres with 70 to 99 percent alumina content and mullite fibres at 72 percent alumina and 28 percent silica are produced by sol-gel spinning or slurry spinning followed by controlled sintering, providing continuous service temperatures from 1400 to 1600 degrees Celsius with high creep resistance and excellent oxidation resistance in gas turbine hot section thermal barrier applications.
Role
Enables thermal insulation and structural reinforcement at temperatures approaching 1600 degrees Celsius where alumino-silicate ceramic fibres devitrify and lose mechanical integrity, serving in aerospace gas turbine exhaust seals, industrial glass melting furnace crowns, and advanced ceramic matrix composite reinforcement requiring thermally stable fibres at temperatures above 1400 degrees Celsius.