Metallic-based adhesion materials
View Patent ↗A material and method for adhering at least two materials that includes the step of interposing at least one intermediate layer between the two materials and associated adhesion material. The materials to be adhered exhibit at least one characteristic dissimilarity and the intermediate material interposed contains at least one shape memory alloy, the shape memory alloy capable of exhibiting superelasticity.
1. A multilayer construction, comprising:
a first layer composed of a material, the first layer material exhibiting a first characteristic;
a second layer composed of a material, the second layer material exhibiting a second characteristic, wherein the first and second characteristics have different values that militate against adhesion of the first layer and the second layer; and
an intermediate layer between the first and second layers, the intermediate layer containing at least one shape memory alloy that improves adhesion between the first layer and the second layer.
2. The multilayer construction of claim 1 wherein the intermediate layer has a thickness between about 0.5 nanometers and about 5 microns.
3. The multilayer construction of claim 1 wherein the at least one shape memory alloy exhibits superelasticity under an ambient temperature of operation for the first and second layers.
4. The multilayer construction of claim 3 wherein the shape memory alloy exhibits superelasticity under loads encountered in friction and wear.
5. The multilayer construction of claim 4 wherein the superelasticity is exhibited at a temperature between about −40° C. and about 140° C.
6. The multilayer construction of claim 3 wherein the shape memory alloy is a superelastic alloy containing at least one of iron-based alloys, copper-based alloys, or nickel-based alloys.
7. The multilayer construction of claim 6 wherein the iron-based alloys include iron and at least one of manganese, silicon, chromium, or nickel.
8. The multilayer construction of claim 6 wherein the wherein the copper-based alloys include copper and at least one of zinc, aluminum, nickel or beryllium.
9. The multilayer construction of claim 6 wherein the nickel-based alloys include nickel and at least one of titanium, copper, niobium palladium, platinum, zirconiun, or hafnium.
10. The multilayer construction of claim 6 wherein the shape memory alloy is at least one of iron-manganese-silicon alloys, iron-chromium-nickel alloys, copper-zinc-aluminum alloys, copper-nickel-aluminum alloys, copper-beryllium-aluminum alloys, or nickel-titanium based alloys.
11. The multilayer construction of claim 9 wherein the nickel-titanium based alloys include at least one of nickel-titanium-copper alloys or nickel-titanium-niobium alloys.
12. The multilayer construction of claim 1 wherein each of the first and second characteristics includes at least one of material hardness, elastic modulus, internal material stress or thermal expansion.
13. The multilayer construction of claim 1 wherein at least one of the first layer material or the second layer material exhibits internal stress when deposited in position relative to the respective other layer.
14. The multilayer construction of claim 1 wherein at least one of the first layer material and the second layer material contains at least one of ceramic compounds, polymer composites, metal matrix composites, and metals such as aluminum alloys, magnesium alloys, or copper alloys.
15. A multilayer, construction, comprising:
a first layer composed of a material, the first layer material exhibiting a first characteristic;
a second layer composed of a material, the second layer material exhibiting a second characteristics, wherein the first and second characteristics have different values; and
an intermediate layer between the first and second layers, the intermediate layer containing at least one shape memory alloy;
wherein at least one of the layers contains at least one of a carbon based coating material, a nitride-based coating material, a carbide based coating material, an oxide based coating material, and a boride based coating material.