COMPOSITE CERAMIC MATERIAL FOR HIGH-TEMPERATURE APPLICATION (VERSIONS) Russian patent published in 2008 - IPC C04B35/488 C04B35/58 

FIELD: construction.

SUBSTANCE: composite ceramic material is produced on the base of refractory oxygen-free and oxide compounds to use in conditions which require high rigidity, firmness and oxidation stability: for manufacturing cutting tools, thermowells for temperature control in molten metals, nozzle extensions for air sand blowers, in gas and oil industry. Composite ceramic material containing ZrB₂ and ZrO₂, in the fist version additionally contains TiN and Y₂O₃ with following mixture ratio: wt %: ZrB₂ 20-40, Y₂O₃ 4.5-10, TiN 10-25.5, ZrO2 - the rest, and in the second variant - ZrN and Y2O3 with following mixture ratio: wt %: ZrB₂ 20-40, Y₂O₃ 4.5-10, ZrN 10-25.5, ZrO₂ - the rest.

EFFECT: high resistance to oxidation and erosion and resistance to thermal shocks at temperature gradient up to 2000 K in conditions of oxidising flow action.

2 cl, 3 ex, 1 tbl, 1 dwg