A method comprising: disposing upon a tube string, a sealing system; the sealing system comprising: an expandable component and a support member; wherein the support member comprises: a plurality of domains contacting one another; wherein the domains comprise: a core comprising a first metal wherein the core has a domain size of 44 to 1400 μm, wherein the first metal is aluminium, magnesium, zinc, copper, iron, nickel, cobalt, or a combination comprising at least one of the foregoing metals; a first layer disposed upon the core, the first layer comprising a second metal; the first metal being chemically different from the second metal, wherein the second metal is aluminium, magnesium, zinc, copper, iron, nickel, cobalt, or a combination comprising at least one of the foregoing metals, wherein the domains comprise a gradient in composition between the first and second metal and wherein the plurality of domains have interstices between them; and a second layer that is disposed upon the first layer, wherein the second layer comprises a third metal that is different from the first metal and the second metal, wherein the second metal is present in an amount of 8 to 10 wt%, based on a total weight of the article, and wherein the third metal is nickel, aluminium, magnesium, zinc, copper, iron, cobalt, or a combination thereof, wherein the third metal is present in an amount of 0.01 to 0.1 wt% based on the total weight of the article; introducing the tube string into a well; dissolving the support member; and swelling the expandable component. an expandable component and a support member; wherein the support member comprises: a plurality of domains contacting one another; wherein the domains comprise: a core comprising a first metal wherein the core has a domain size of 44 to 1400 μm, wherein the first metal is aluminium, magnesium, zinc, copper, iron, nickel, cobalt, or a combination comprising at least one of the foregoing metals; a first layer disposed upon the core, the first layer comprising a second metal; the first metal being chemically different from the second metal, wherein the second metal is aluminium, magnesium, zinc, copper, iron, nickel, cobalt, or a combination comprising at least one of the foregoing metals, wherein the domains comprise a gradient in composition between the first and second metal and wherein the plurality of domains have interstices between them; and a second layer that is disposed upon the first layer, wherein the second layer comprises a third metal that is different from the first metal and the second metal, wherein the second metal is present in an amount of 8 to 10 wt%, based on a total weight of the article, and wherein the third metal is nickel, aluminium, magnesium, zinc, copper, iron, cobalt, or a combination thereof, wherein the third metal is present in an amount of 0.01 to 0.1 wt% based on the total weight of the article; introducing the tube string into a well; dissolving the support member; and swelling the expandable component. a core comprising a first metal wherein the core has a domain size of 44 to 1400 μm, wherein the first metal is aluminium, magnesium, zinc, copper, iron, nickel, cobalt, or a combination comprising at least one of the foregoing metals; a first layer disposed upon the core, the first layer comprising a second metal; the first metal being chemically different from the second metal, wherein the second metal is aluminium, magnesium, zinc, copper, iron, nickel, cobalt, or a combination comprising at least one of the foregoing metals, wherein the domains comprise a gradient in composition between the first and second metal and wherein the plurality of domains have interstices between them; and a second layer that is disposed upon the first layer, wherein the second layer comprises a third metal that is different from the first metal and the second metal, wherein the second metal is present in an amount of 8 to 10 wt%, based on a total weight of the article, and wherein the third metal is nickel, aluminium, magnesium, zinc, copper, iron, cobalt, or a combination thereof, wherein the third metal is present in an amount of 0.01 to 0.1 wt% based on the total weight of the article; introducing the tube string into a well; dissolving the support member; and swelling the expandable component.