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US 2025/0109476 A1Published application
Method for Improved Heavy Metal Wetting on a Surface
AssigneeUchicago Argonne, LLC
InventorsSumit Bhattacharya, Yinbin Miao, Nicolas E. Stauff, Abdellatif M. Yacout
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Abstract
A method for coating a coolant metal on a ceramic substrate comprises modification of the substrate surface to provide an oxide free surface upon which the coolant metal is deposited.
Claims28
A method of depositing a coolant metal on a SiC substrate, comprising:
- co-depositing Al and SiC onto a surface of the SiC substrate to form a first layer;
- co-depositing Al and a metal onto the first layer to form a second layer, wherein the metal is the same as the coolant metal;
- exposing the substrate having the first and second layers to a two-stage heating comprising a first stage in which the substrate is heated to a first temperature of 250° C. to 600° C. and a second stage in which the substrate is heated to a second temperature of 700° C. to 1200° C. to thereby form an intermediate structure comprising (i) an intermediate layer between the first layer and the SiC substrate and (ii) an aluminum oxide layer on an exposed surface of the second layer, wherein the intermediate layer comprises aluminum carbide and silicon;
- and
- immersing the intermediate structure in a low oxygen molten metal bath comprising the coolant metal, under vacuum, thereby removing the aluminum oxide layer to expose the second layer, which then dissolves in the molten metal bath leaving an exposed surface comprising an admixture of aluminum carbide, silicon and SiCx onto which the coolant metal is deposited from the molten metal bath,
- wherein the coolant metal comprises Sn, Pb, or Pb—Bi eutectic alloy.
3 more elements
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A method of depositing a coolant metal on a ceramic substrate comprising a carbide or nitride of M, where M is a metal or metalloid, comprising:
- co-depositing Al and a carbide or nitride of M to form a first layer, wherein the carbide or nitride of M is the same carbide or nitride of M as in the substrate;
- co-depositing Al and a metal onto the first layer to form a second layer, wherein the metal is the same as the coolant metal to be deposited;
- exposing the substrate having the first and second layers to a two-stage heating comprising a first stage in which the substrate is heated to a first temperature of 250° C. to 600° C. and a second stage in which the substrate is heated to a second temperature of 700° C. to 1200° C. to thereby form thereby form an intermediate structure comprising (i) an intermediate layer between the first layer and the substrate and (ii) an aluminum oxide layer on an exposed surface of the second layer, wherein the intermediate layer comprises M and aluminum carbide or aluminum nitride;
- and
- immersing the intermediate structure in a low oxygen molten metal bath comprising the coolant metal under vacuum, thereby removing the aluminum oxide layer to expose the second layer, which then dissolves in the molten metal bath leaving an exposed surface comprising an admixture of aluminum carbide, M, and a nitride or carbide of M onto which the coolant metal is deposited from the molten metal bath,
- wherein the coolant metal is Pb, Sn, or a Pb—Bi eutectic alloy.
3 more elements
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A method of depositing a coolant metal on a ceramic substrate comprising a carbide or nitride of M, where M is a metal or metalloid, comprising:
- co-depositing Al and a carbide or nitride of M to form a first layer, wherein the carbide or nitride of M is the same carbide or nitride of M as in the substrate;
- co-depositing Al and a metal onto the first layer to form a second layer, wherein the metal is the same as the coolant metal to be deposited;
- exposing the substrate having the first and second layers to a heating process comprising holding the substrate at a hold temperature of 700° C. to 1200° C. to thereby form an intermediate structure comprising (i) an intermediate layer between the first layer and the substrate and (ii) an aluminum oxide layer on an exposed surface of the second layer, wherein the intermediate layer comprises M and aluminum carbide or aluminum nitride;
- and
- immersing the intermediate structure in a low oxygen molten metal bath comprising the coolant metal under vacuum, thereby removing the aluminum oxide layer to expose the second layer, which then dissolves in the molten metal bath leaving an exposed surface comprising an admixture of aluminum carbide, M, and a nitride or carbide of M onto which the coolant metal is deposited from the molten metal bath,
- wherein the coolant metal is Pb, Sn, or a Pb—Bi eutectic alloy.
3 more elements
Dependencies are inferred from the claim text.