Patent ID: 8367576

Claim:
A liner for a blast nozzle comprising a SiAlON-containing material having a surface conductivity of less than or equal to about 12 megaOhms and an erosion rate of about 1.9×10 −4 cm 3 /g or less, wherein the SiAlON-containing ceramic material has a composition comprising, in volume percent, from about 60 to about 85% two-phase SiAlON, from about 5 to about 25% silicon carbide, and from about 8 to about 15% of a conductive phase, wherein the two-phase SiAlON has an alpha-prime phase to beta-prime phase ratio in the range of about 0.4 to about 1.0, and the conductive phase comprises at least one material selected from the group consisting of titanium nitride, tantalum nitride, zirconium nitride, and titanium carbide.