Strip product forming a surface coating of perovskite or spinel for electrical contacts
AssigneeSandvik Intellectual Property AB
InventorsMikael Schuisky, Finn Petersen, Niels Christiansen, Joergen Gutzon Larsen, Soeren Linderoth, Lars Mikkelsen
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Abstract
A strip product consists of a metallic substrate, such as stainless steel, and a coating, which in turn comprises at least one metallic layer and one reactive layer. The coated strip product is produced by providing the different layers, preferably by coating, and thereafter oxidizing the coating to accomplish a conductive surface layer comprising perovskite and/or spinel structure.
Claims19
Strip product to be used as electrical contact consisting of a stainless steel base material and a coating provided on the stainless steel base material,
- wherein the coating comprises at least one metallic layer, and at least one reactive layer which forms a spinel and/or perovskite structure with the at least one metallic layer when oxidised,
- wherein a total thickness of the at least one reactive layer is less than a total thickness of the at least one metallic layer,
- wherein a composition of the at least one metallic layer includes Co or a Co-based alloy, and
- wherein a composition of the at least one reactive layer includes Ce or a Ce-based alloy,
- wherein the at least one reactive layer is located between the at least one metallic layer and the stainless steel base material.
Strip product to be used as electrical contact consisting of:
- a stainless steel base material;
- and
- a coating provided on the stainless steel base material,
- wherein the coating comprises at least one metallic layer of Co or a Co-based alloy, and at least one reactive layer containing at least one element or compound which forms a spinel and/or perovskite structure with the Co or a Co-based alloy of the at least one metallic layer of Co or a Co-based alloy when oxidized,
- wherein the at least one element or compound which forms a spinel and/or perovskite structure is Ce or a Ce-based alloy,
- wherein a thickness of the at least one reactive layer is less than a thickness of the at least one metallic layer,
- wherein each of the at least one reactive layer and the at least one metallic layer is less than 1 μm thick, and
- wherein the at least one reactive layer is located between the at least one metallic layer and the stainless steel base material.
Strip product to be used as electrical contact consisting of a stainless steel base material and a coating provided on the stainless steel base material,
- wherein the coating comprises at least one metallic layer, and at least one reactive layer which forms a spinel and/or perovskite structure with the at least one metallic layer when oxidised,
- wherein a total thickness of the at least one reactive layer is less than a total thickness of the at least one metallic layer,
- wherein a composition of the at least one metallic layer consists of Co or a Co-based alloy, and
- wherein a composition of the at least one reactive layer consists of Ce or a Ce-based alloy,
- wherein the at least one reactive layer is located between the at least one metallic layer and the stainless steel base material.
Strip product to be used as electrical contact consisting of a stainless steel base material and a coating provided on the stainless steel base material,
- wherein the coating comprises at least one metallic layer, and at least one reactive layer which forms a spinel and/or perovskite structure with the at least one metallic layer when oxidised,
- wherein a total thickness of the at least one reactive layer is less than a total thickness of the at least one metallic layer,
- wherein a composition of the at least one metallic layer includes Co or a Co-based alloy,
- wherein a composition of the at least one reactive layer includes Ce or a mixture of Ce and one or more of La, Y, Bi, Sr, Ba, Ca, Mg, Mn, Co, Ni, and Fe, and
- wherein the at least one reactive layer is located between the at least one metallic layer and the stainless steel base material.
Strip product to be used as electrical contact consisting of:
- a stainless steel base material;
- and
- a coating provided on the stainless steel base material,
- wherein the coating comprises at least one metallic layer of Co or a Co-based alloy, and at least one reactive layer containing at least one element or compound which forms a spinel and/or perovskite structure with the Co or a Co-based alloy of the at least one metallic layer of Co or a Co-based alloy when oxidized,
- wherein the at least one element or compound which forms a spinel and/or perovskite structure is Ce or a mixture of Ce and one or more of La, Y, Bi, Sr, Ba, Ca, Mg, Mn, Co, Ni, and Fe,
- wherein a thickness of the at least one reactive layer is less than a thickness of the at least one metallic layer,
- wherein each of the at least one reactive layer and the at least one metallic layer is less than 1 μm thick, and
- wherein the at least one reactive layer is located between the at least one metallic layer and the stainless steel base material.
Strip product to be used as electrical contact consisting of a stainless steel base material and a coating provided on the stainless steel base material,
- wherein the coating comprises at least one metallic layer, and at least one reactive layer which forms a spinel and/or perovskite structure with the at least one metallic layer when oxidised,
- wherein a total thickness of the at least one reactive layer is less than a total thickness of the at least one metallic layer,
- wherein a composition of the at least one metallic layer consists of Co or a Co-based alloy,
- wherein a composition of the at least one reactive layer consists of Ce or a mixture of Ce and one or more of La, Y, Bi, Sr, Ba, Ca, Mg, Mn, Co, Ni, and Fe, and
- wherein the at least one reactive layer is located between the at least one metallic layer and the stainless steel base material.
Dependencies are inferred from the claim text.