Aluminum oxide based thick layers produced by plasma jet spraying
AssigneeSulzer Metco AG
InventorsGérard Barbezat, Stefan Zimmermann
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Abstract
Al2O3 based layers having a total thickness of more than 0.3 mm are produced on a substrate by plasma jet spraying, said Al2O3 based layers having a laminar sandwiched structure wherein at least one Al2O3 layer is interpolated between two intermediate layers which are produced by plasma jet spraying as well, said intermediate layers consisting of a ceramic laminated material which is different from Al2O3 and which on cooling increases in volume by phase transition. Preferred materials for said intermediate layers are Al2O3/ZrO2, Al2O3/TiO2, ZrO2/Y2O3, Y2O3/ZrO2, ZrO2/MgO ZrO2/CeO2 and ZrO2/CaO alloy systems.
Claims6
An Al2O3 based laminate having a thickness of more than 0.3 mm produced on a substrate by plasma jet spraying, said Al2O3 based laminate being exempt from macrofissure reducing the dielectric strength and having a laminar sandwiched structure wherein at least one Al2O3 layer is interpolated between two intermediate layers, which are produced by plasma jet spraying as well, said intermediate layers consisting of a ceramic laminated material which is different from Al2O3 and which on cooling increase in volume by phase transition, said intermediate layers consisting of an Al2O3/ZrO2 alloy system comprising 5 to 50 percent by weight of ZrO2.
An Al2O3 based laminate having a thickness of more than 0.3 mm produced on a substrate by plasma jet spraying, said Al2O3 based laminate having a laminar sandwiched structure wherein at least one Al2O3 layer is interpolated between two intermediate layers which are produced by plasma jet spraying as well, said intermediate layers consisting of a ceramic laminated material which is different from Al2O3 and which on cooling increase in volume by phase transition, said intermediate layers consisting of an Al2O3/TiO2 alloy system.
An Al2O3 based laminate having a thickness of more than 0.3 mm produced on a substrate by plasma jet spraying, said Al2O3 based laminate having a laminar sandwiched structure wherein at least one Al2O3 layer is interpolated between two intermediate layers, which are produced by plasma jet spraying as well, said intermediate layers consisting of a ceramic laminated material which is different from Al2O3 and which on cooling increase in volume by phase transition, said intermediate layers consisting of an Al2O3/Y2O3 alloy system comprising from 8 to 22 percent by weight of Y2O3.
Dependencies are inferred from the claim text.