Customized magnetic susceptibility materials

Patent metadata

Field	Value
Publication number	US-9810751-B2
Application number	US-201414188374-A
Country	US
Kind code	B2
Filing date	Feb 24, 2014
Priority date	Feb 24, 2014
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

One example includes a method for fabricating a compound material. The method includes providing a first discrete material layer having a first thickness dimension. The first discrete material layer includes a first material having a first magnetic susceptibility. The method also includes depositing a second discrete material layer having a second thickness dimension over the first discrete material layer. The second discrete material layer can include a second material having a second magnetic susceptibility. The relative first and second thickness dimensions can be selected to provide a desired magnetic susceptibility of the compound material.

First claim

What is claimed is:

1. A method for fabricating a compound material, the method comprising:
providing a first discrete material layer having a first thickness dimension, the first discrete material layer comprising a first material having a first magnetic susceptibility;
depositing a second discrete material layer having a second thickness dimension over the first discrete material layer, the second discrete material layer comprising a second material having a second magnetic susceptibility different from that of the first material; and
depositing a third discrete material layer of titanium or copper between the first discrete material layer and the second discrete material layer, the third discrete material layer comprising a third material having a third magnetic susceptibility different from those of the first and second materials, wherein the third discrete material layer is configured as a non-magnetic adhesion layer with respect to the first and second discrete material layers, and the relative first, second, and third thickness dimensions are selected to provide the desired magnetic susceptibility of the compound material comprising the first, second, and third discrete material layers;
and wherein one of:
the first discrete material layer is gold and the second discrete material layer is tungsten carbide, or
the first discrete material layer is a zirconium oxide ceramic and the second discrete material layer is an yttrium oxide ceramic.

2. The method of claim 1 , further comprising selecting the relative first and second thickness dimensions to provide the desired magnetic susceptibility of the compound material approximately equal to a surrounding medium.

3. The method of claim 2 , wherein the surrounding medium is a vacuum, wherein the first thickness dimension is selected to be approximately equal to the second magnetic susceptibility divided by a magnitude sum of the first and second magnetic susceptibilities, and wherein the second thickness dimension is selected to be approximately equal to the first magnetic susceptibility divided by the magnitude sum of the first and second magnetic susceptibilities.

4. The method of claim 1 , further comprising constructing an at least partial enclosure with the compound material, such that the first layer is an interior layer with respect to the at least partial enclosure and the second discrete material layer is an exterior layer with respect to the at least partial enclosure.

5. The method of claim 4 , wherein the second discrete material layer is selected to have at least one enhanced material property relative to the first discrete material layer.

6. The method of claim 4 , wherein the first thickness dimension is substantially uniform about the at least partial enclosure and wherein the second thickness dimension is substantially uniform about the at least partial enclosure.

7. A method for fabricating a substantially enclosed structure, the method comprising:
providing a first discrete material layer having a first thickness dimension as an interior layer with respect to the substantially enclosed structure, the first discrete material layer comprising a first material that is one of paramagnetic and diamagnetic;
depositing a second discrete material layer having a second thickness dimension over the first discrete material layer as an exterior layer with respect to the substantially enclosed structure, the second discrete material layer comprising a second material that is the other of paramagnetic and diamagnetic relative to the first material; and
depositing a third discrete material layer of titanium or copper as a non-magnetic adhesion layer between the first discrete material layer and the second discrete material layer, the third discrete material layer providing greater adhesion of the first and second discrete material layers, the third discrete material layer comprising a third material having a third magnetic susceptibility different from those of the first and second materials,
the relative first, second, and third thickness dimensions being selected to provide an aggregate magnetic susceptibility that is approximately equal to a surrounding medium;
and wherein one of:
the first discrete material layer is gold and the second discrete material layer is tungsten carbide, or
the first discrete material layer is a zirconium oxide ceramic and the second discrete material layer is an yttrium oxide ceramic.

8. The method of claim 7 , wherein the second discrete material layer is selected to have at least one enhanced material property relative to the first discrete material layer.

9. The method of claim 7 , wherein the first thickness dimension is substantially uniform about the substantially enclosed structure and wherein the second thickness dimension is substantially uniform about the substantially enclosed structure.

Assignees

• Bulatowicz Michael D
• Northrop Grumman Systems Corp

Inventors

• Bulatowicz Michael D

Classifications

• B32B18/00

  Layered products essentially comprising ceramics, e.g. refractory products · CPC title

• C04B2237/408

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

• B32B15/01 Primary

  all layers being exclusively metallic {(making layered metal workpieces by pressure cladding B23K20/22; making coatings with a metallic material characterised by its composition C23C30/00)} · CPC title

• B32B15/00

  Layered products comprising {a layer of} metal · CPC title

• B05D7/52

  Two layers · CPC title