Multilayer ultra-high-temperature ceramic coatings
View Patent ↗A coated carbon-carbon composite material with multiple ceramic layers to provide oxidation protection from ultra-high-temperatures, where if the carbon-carbon composite material is uninhibited with B 4 C particles, then the first layer on the composite material is selected from ZrB 2 and HfB 2 , onto which is coated a layer of SiC coated and if the carbon-carbon composite material is inhibited with B 4 C particles, then protection can be achieved with a layer of SiC and a layer of either ZrB 2 and HfB 2 in any order.
1. A coated carbon-carbon composite material, comprising:
an inhibited carbon-carbon material comprising B 4 C particles;
a first continuous layer comprising at least one material chosen from ZrB 2 and HfB 2 coated onto at least a portion of a surface of said carbon-carbon material; and
a second continuous layer comprising SiC coated onto said first continuous layer.
2. The coated carbon-carbon composite material of claim 1 comprising less than 10 volume weight % of B 4 C particles.
3. The coated carbon-carbon composite material of claim 1 wherein said uninhibited carbon-carbon composite material had a density of between approximately 1.5 g/cm 3 and 1.6 g/cm 3 .
4. The coated carbon-carbon composite material of claim 1 wherein said B 4 C particles have sizes ranging from approximately 0.1 μm to approximately 20 μm.
5. The coated carbon-carbon composite material of claim 1 where said first continuous layer has a thickness between approximately 0.1 μm and approximately 30 μm.
6. The coated carbon-carbon composite material of claim 1 where said second continuous layer has a thickness between approximately 1 μm and approximately 150 μm.
7. A coated carbon-carbon composite material, comprising:
an inhibited carbon-carbon material comprising B 4 C particles;
a first continuous layer comprising SiC coated onto at least a portion of a surface of said carbon-carbon material; and
a second continuous layer comprising at least one material chosen from ZrB 2 and HfB 2 coated onto said first continuous layer.
8. The coated carbon-carbon composite material of claim 7 comprising less than 10 volume weight % of B 4 C particles.
9. The coated carbon-carbon composite material of claim 7 wherein said uninhibited carbon-carbon composite material had a density of between approximately 1.5 g/cm 3 and 1.6 g/cm 3 .
10. The coated carbon-carbon composite material of claim 7 wherein said B 4 C particles have sizes ranging from approximately 0.1 μm to approximately 20 μm.
11. The coated carbon-carbon composite material of claim 7 where said first continuous layer has a thickness between approximately 1 μm and approximately 150 μm.
12. The coated carbon-carbon composite material of claim 7 where said second continuous layer has a thickness between approximately 0.1 μm and approximately 30 μm.