| 摘要 |
A component which is made of or coated with a refractory material for use at high temperature, the refractory material comprising particles of a refractory metal compound in an oxide matrix, the refractory metal compound being selected from metal borides, silicides, nitrides, carbides and phosphides, the oxide matrix comprising a bonding mixed oxide made of a single mixed oxide or a plurality of miscible mixed oxides, the refractory material being obtainable from a heat treated slurry that comprises: a) a colloidal and/or polymeric carrier that comprises colloidal and/or polymeric oxide of at least one metal; b) suspended particles of the refractory metal compound that are covered with a film of oxide of the metal of the refractory metal compound, the oxide film being reactable upon heat treatment with said colloidal and/or polymeric oxide to form a mixed oxide comprised in said bonding mixed oxide; and c) suspended metal oxide particles which are reactable upon heat treatment with said colloidal and/or polymeric oxide to form a mixed oxide comprised in said bonding mixed oxide, wherein the bonding mixed oxide consists of: -a single mixed oxide when the metal of the suspended metal oxide particles is the same as the metal of the suspended refractory metal compound particles and the reactable oxide of said colloidal and/or polymeric oxide is an oxide of one metal only; or -a plurality of miscible mixed oxides when at least one metal of the suspended metal oxide particles is different to the metal of the suspended refractory metal compound particles and/or when said colloidal and/or polymeric oxide comprises reactable oxides of different metals. |
