Metallic component for aqueous environments
AssigneesFondazione Istituto Italiano Di Tecnologia, Politecnico Di Milano
InventorsFabio DI FONZO, Mattia CABRIOLI
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Abstract
Metallic component for aqueous environments, comprising a body of metallic material and a protective coating applied to an outer surface of the body of zirconium alloy, intended in use to contact an aqueous working fluid, wherein the protective coating includes at least one oxide layer, comprising a matrix oxide and at least one doping element dispersed in the matrix oxide, the matrix oxide being selected from the group consisting of Y2O3, La2O3, SC2O3, Yb2O3, CaO, MgO, Mg2AhO4, or a combination thereof, and the doping element being selected from the group consisting of Ti, V, Cr, Fe, Ni, Cu, Zr, Nb, Sn, Ta, P and oxides thereof.
Claims14
A metallic component for aqueous environments, comprising a body of metallic material and a protective coating applied to an outer surface of the body of metallic material, intended in use to contact an aqueous working fluid,
- wherein the protective coating includes at least one oxide layer, comprising a matrix oxide and at least one doping oxide dispersed in the matrix oxide, the matrix oxide being selected from the group consisting of Y2O3, La2O3, Sc2O3, Yb2O3, CaO, MgO, Mg2Al2O4, or a combination thereof, and said the at least one doping oxide being selected from the group consisting of Ti, V, Cr, Fe, Ni, Cu, Zr, Nb, Sn, Ta, P oxides,
- wherein the at least one doping oxide comprises:
- a single doping oxide, wherein an oxidized element of the single doping oxide is capable of forming a ternary compound with the matrix oxide, and a concentration Cd of the single doping oxide is such that 0.1% mol≤Cd<CT, where CT is a maximum value of concentration, defined as the concentration of the single doping oxide in the ternary compound associated to a highest concentration of matrix oxide in a phase diagram matrix oxide-single doping oxide, or
- a first doping oxide and at least one second doping oxide, wherein an oxidized element of the first doping oxide is capable of forming a ternary compound with the matrix oxide, and a concentration Cd of the first doping oxide is such that 0.1% mol≤Cd<CT, where CT is a maximum value of concentration, defined as the concentration of the first doping oxide in the ternary compound associated to a highest concentration of matrix oxide in a phase diagram matrix oxide-first doping oxide, and
- wherein a concentration of the at least one second doping oxide is lower than or equal to the concentration Cd of the first doping oxide.
A method for producing a metallic component for aqueous environments, comprising a body of metallic material and a protective coating applied to an outer surface of the body of metallic material, intended in use to contact an aqueous working fluid,
- wherein the protective coating includes at least one oxide layer, comprising a matrix oxide and at least one doping oxide dispersed in the matrix oxide, the matrix oxide being selected from the group consisting of Y2O3, La2O3, Sc2O3, Yb2O3, CaO, MgO, Mg2Al2O4, or a combination thereof, and the at least one doping oxide being selected from the group consisting of Ti, V, Cr, Fe, Ni, Cu, Zr, Nb, Sn, Ta, P oxides,
- wherein the at least one doping oxide comprises:
- a single doping oxide, wherein an oxidized element of the single doping oxide is capable of forming a ternary compound with the matrix oxide, and a concentration Ca of the single doping oxide is such that 0.1% mol≤Cd<CT, where CT is a maximum value of concentration, defined as the concentration of the single doping oxide in the ternary compound associated to a highest concentration of matrix oxide in a phase diagram matrix oxide-single doping oxide, or
- a first doping oxide and at least one second doping oxide, wherein an oxidized element of the first doping oxide is capable of forming a ternary compound with the
- matrix oxide, and a concentration Cd of the first doping oxide is such that 0.1% mol≤Cd<CT, where CT is a maximum value of concentration, defined as the concentration of the first doping oxide in the ternary compound associated to a highest concentration of matrix oxide in a phase diagram matrix oxide-first doping oxide, and
- wherein a concentration of the at least one second doping oxide is lower than or equal to the concentration Cd of the first doping oxide,
- the method comprising:
- depositing the at least one oxide layer onto the body of metallic material by physical vapor deposition or cold spray, the body of metallic material being kept at a deposition temperature lower than 300° C.
Dependencies are inferred from the claim text.