Multilayered cellular metallic glass structures

• US 8,431,208 B2
• Filed: 09/20/2011
• Issued: 04/30/2013
• Est. Priority Date: 08/20/2007
• Status: Active Grant

• Current Assignee: California Institute of Technology
• Original Assignee: California Institute of Technology
• Inventors: Demetriou, Marios D., Johnson, William L.
• Primary Examiner(s): Sample, David
• Assistant Examiner(s): Gugliotta, Nicole T
• Application Number:
  US13/237,631
• Publication Number:
  US 20120077052A1
• Time in Patent Office: 588 Days
• Field of Search: None
• US Class Current: 428/116
• CPC Class Codes: B32B 15/00 Layered products comprising a layer of metal
• CPC Class Codes: B32B 15/08 of synthetic resin
• CPC Class Codes: B32B 15/10 of wood
• CPC Class Codes: B32B 21/04 comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a layer of a particular substance B32B9/042; next to a bituminous or tarry layer B32B11/042; next to a water setting substance layer B32B13/10; next to a metal layer B32B15/10; next to a glass layer B32B17/062; next to a layer formed of natural mineral fibres or particles B32B19/042; next to a cellulosic plastic layer B32B23/044
• CPC Class Codes: B32B 2305/024 Honeycomb
• CPC Class Codes: B32B 2307/50 having particular mechanical properties
• CPC Class Codes: B32B 2307/51 Elastic
• CPC Class Codes: B32B 2307/558 Impact strength, toughness
• CPC Class Codes: B32B 2307/584 Scratch resistance
• CPC Class Codes: B32B 2307/702 Amorphous
• CPC Class Codes: B32B 2307/714 Inert, i.e. inert to chemical degradation, corrosion
• CPC Class Codes: B32B 2307/72 Density
• CPC Class Codes: B32B 2307/732 Dimensional properties
• CPC Class Codes: B32B 2535/00 Medical equipment, e.g. bandage, prostheses or catheter
• CPC Class Codes: B32B 2571/00 Protective equipment
• CPC Class Codes: B32B 2605/18 Aircraft
• CPC Class Codes: B32B 27/06 as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08
• CPC Class Codes: B32B 3/12 characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
• CPC Class Codes: B32B 3/266 characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
• CPC Class Codes: B32B 3/28 characterised by a layer comprising a deformed thin sheet , i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled B32B29/08 takes precedence
• CPC Class Codes: B32B 9/005 : comprising one layer of ceramic material, e.g. porcelain, ceramic tile layered products with at least two ceramic layers composed mainly of ceramic B32B18/00
• CPC Class Codes: B32B 9/041 : of metal
• CPC Class Codes: C22C 45/00 : Amorphous alloys making amorphous non-ferrous alloys C22C1/11
• CPC Class Codes: C22C 45/04 : with nickel or cobalt as the major constituent
• CPC Class Codes: E04C 2/365 : by honeycomb structures
• CPC Class Codes: Y10T 428/1234 : Honeycomb, or with grain orientation or elongated elements in defined angular relationship in respective components [e.g., parallel, inter- secting, etc.]
• CPC Class Codes: Y10T 428/234 : including elements cooperating to form cells
• CPC Class Codes: Y10T 428/24149 : Honeycomb-like
• CPC Class Codes: Y10T 428/24653 : Differential nonplanarity at margin
• CPC Class Codes: Y10T 428/24744 : Longitudinal or transverse tubular cavity or cell
• CPC Class Codes: Y10T 428/24777 : Edge feature
• CPC Class Codes: Y10T 428/254 : Polymeric or resinous material

Abstract

Multi-layered cellular metallic glass structures and methods of preparing the same are provided. In one embodiment, the cellular metallic glass structure includes at least one patterned metallic glass sheet and at least one additional sheet. The at least one patterned metallic glass sheet may include multiple sheets connected together to form a group of sheets, and the structure may include a group of sheets sandwiched between two outer sheets. The patterned metallic glass sheets may be patterned by thermoplastically forming two- and/or three-dimensional patterns in the metallic glass sheets. The metallic glass cellular structures are useful in a wide variety of applications, including but not limited to blast protection applications, energy absorption applications, structural support applications, biomedical implant applications, heat exchanger applications, thermal management applications, electrical shielding applications, magnetic shielding applications, and debris and radiation shielding for aerospace and outer space applications.

Claims

1. A cellular structure comprising

at least one metallic glass sheet that is configured to form a lattice comprising at least one cell;

at least one sheet that is at least partially flat disposed on at least one horizontal side of the lattice; and

wherein the at least one metallic glass lattice has a thickness of less than the plastic zone radius of the metallic glass.

2. The cellular structure according to claim 1, comprising at least two sheets that are at least partially flat, wherein the at least one metallic glass lattice is disposed between the at least two sheets.

3. The cellular structure according to claim 1, wherein the at least one sheet that is at least partially flat comprises a metallic glass.

4. The cellular structure according to claim 3, wherein the at least one sheet that is at least partially flat has a thickness of less than the plastic zone radius of the metallic glass.

5. The cellular structure according to claim 1, wherein the geometry of the lattice is configured such that the plastic collapse strength of the lattice is at least 50% of the plastic yield strength of the metallic glass.

6. The cellular structure according to claim 1, wherein the geometry of the lattice is configured such that the density of the lattice is less than 50% of the density of the metallic glass.

7. The cellular structure according to claim 1, wherein the geometry of the lattice is configured such that the specific strength of the lattice is greater than the specific strength of the metallic glass.

8. The cellular structure according to claim 1, wherein the plastic zone radius (r_p) of the metallic glass is determined by the equation:

r_p=K_Ic²/π

σ

_y², where K_Ic is the mode I fracture toughness of the metallic glass, and σ

_y is the plastic yield strength of the metallic glass.

9. The cellular structure according to claim 1, wherein the plastic collapse strength (σ

) of the lattice is determined by the equation;

σ

=Aσ

_y(t/l)ⁿ, where σ

_y is the plastic yield strength of the metallic glass, t is the thickness of the sheet, l is the width of the cell face, and where A is between 4 and 7 and n is between 1 and 3.

10. The cellular structure according to claim 9, wherein A is about 6 and n is about 2.

11. The cellular structure according to claim 1, wherein the density (ρ

) of the lattice is determined by the equation;

ρ

=Bρ

_s(t/l), where ρ

_s is the density of the metallic glass, t is the thickness of the sheet, l is the width of the cell face, and B is between 1 and 3.

12. The cellular structure according to claim 11, wherein B is about 2.

13. The cellular structure according to claim 1, wherein the at least one metallic glass lattice comprises a material selected from the group consisting of Fe-based alloys, Co-based alloys, Mg-based alloys, Al-based alloys, Zr-based alloys, Ti-based alloys, Au-based alloys, Pt-based alloys, Ni-based alloys, Pd-based alloys and rare earth-based alloys.

14. The cellular structure according to claim 1, wherein the at least one sheet that is at least partially flat comprises a material selected from the group consisting of polymers, epoxies, glasses, wood, ceramics, metals, metallic glasses and composites thereof.

15. The cellular structure according to claim 1, wherein the at least one sheet that is at least partially flat comprises the same metallic glass as the lattice.

16. The cellular structure according to claim 1, wherein the lattice has geometry selected from the group consisting of honeycomb, prismatic, hexagonal, square, triangular, diamond, and nuvtrusses.

17. A cellular electronics casing or frame comprising:

a body having walls defining at least one enclosure, wherein the enclosure is designed to at least partially encase at least one electronic component;

wherein at least a portion of the body is formed from at least one metallic glass sheet that is configured to form a lattice comprising at least one cell, and at least one sheet that is at least partially flat disposed on at least one horizontal side of the lattice; and

and wherein the at least one metallic glass lattice has a thickness of less than the plastic zone radius of the metallic glass.

18. The casing according to claim 17, comprising at least two sheets that are at least partially flat, wherein the at least one metallic glass lattice is disposed between the at least two solid sheets.

19. The casing according to claim 17, wherein the at least one sheet that is at least partially flat is formed of a metallic glass.

20. The casing according to claim 19, wherein the at least one sheet that is at least partially flat has a thickness less than the plastic zone radius of the metallic glass.

21. The casing according to claim 17, wherein the geometry of the lattice is configured such that the plastic collapse strength of the lattice is at least 50% of the plastic yield strength of the metallic glass.

22. The casing according to claim 17, wherein the geometry of the lattice is configured such that the density of the lattice is less than 50% of the density of the metallic glass.

23. The casing according to claim 17, wherein the geometry of the lattice is configured such that the specific strength of the lattice is greater than the specific strength of the metallic glass.

24. The casing according to claim 17, wherein the lattice has geometry selected from the group consisting of honeycomb, prismatic, hexagonal, square, triangular, diamond, and nuvtrusses.

25. The casing according to claim 17, wherein the body has at least one opening.

26. The casing according to claim 25, wherein the at least one opening is configured to allow access to the at least one electronic component.

27. The casing according to claim 17, wherein the body comprises at least two separate pieces that are fixedly or moveably interconnected.

28. The casing according to claim 17, wherein the body forms a casing for an electronic selected from the group consisting of cellular phones, PDAs, portable computers, and digital cameras.

29. The casing according to claim 17, wherein the casing provides at least partial electronic interference protection to the electronic component.