Nanomaterial assisted bonding method to produce curved surfaces

Patent metadata

Field	Value
Publication number	US-10486405-B2
Application number	US-201815872011-A
Country	US
Kind code	B2
Filing date	Jan 16, 2018
Priority date	Jan 16, 2018
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A method of fabricating a curved surface bonding technique using low melting temperature nanoparticles or nanofilms/nanoparticles of reactive metals as eutectic compounds. The ability of nanomaterials to melt at low temperature lowers the bonding temperature and reduces/eliminates the residual stresses generated in bulk material during the bonding process of two materials with different coefficients of thermal expansion. The nanoscale materials will then be integrated and the new bond will assume properties of the bulk material, including its higher melting temperature.

First claim

The invention claimed is:

1. A method of fabricating a curved surface comprising the steps of:
providing a first material, the first material having a first coefficient of thermal expansion, a predetermined area of the first material having a first predetermined temperature;
providing a second material, the second material having a second coefficient of thermal expansion, the second coefficient of thermal expansion being smaller than the first coefficient of thermal expansion, a predetermined area of the second material having a second predetermined temperature, the second predetermined temperature being cooler than the first predetermined temperature;
providing a bonding material, the bonding material being disposed in between the first and second materials:
pressing the first and second materials together,
activating the bonding material such that a surface is formed;
allowing the surface to cool such that the desired curvature is attained.

2. The method of claim 1 , wherein the step of providing a bonding material further comprising the substeps of:
depositing a first layer of tin on a second face of the first material;
depositing a layer of titanium on a first face of the second material;
depositing a layer of gold on the layer of titanium
depositing a second layer of tin on the layer of gold;
providing a nanofoil in between the first and second layers of tin.

3. The method of claim 1 , wherein the step of activating the bonding material includes igniting the nanofoil.

4. The method of claim 1 , wherein the first material has a plurality of predetermined areas, each of the plurality of predetermined areas having a first predetermined temperature.

5. The method of claim 1 , further including positioning the first predetermined area of the first material on a heating element until the predetermined area achieves the first predetermined temperature.

6. The method of claim 1 , further including positioning the second material on a cooling element until the predetermined area achieves the second predetermined temperature.

7. The method of claim 1 , wherein the difference between the first predetermined temperature and the second predetermined temperature is 100 degrees Celsius.

Assignees

• Us Dept Energy

Inventors

• Suthar Kamleshkumar
• White Marion M

Classifications

• C04B2237/84

  Joining of a first substrate with a second substrate at least partially inside the first substrate, where the bonding area is at the inside of the first substrate, e.g. one tube inside another tube · CPC title

• C04B2237/76

  Forming laminates or joined articles comprising at least one member in the form other than a sheet or disc, e.g. two tubes or a tube and a sheet or disc · CPC title

• C04B2237/72

  Forming laminates or joined articles comprising at least two interlayers directly next to each other · CPC title

• C04B2237/55

  Pre-treatments of a coated or not coated substrate other than oxidation treatment in order to form an active joining layer · CPC title

• C04B2237/408

  Noble metals, e.g. palladium, platina or silver · CPC title