Process for making metallic/intermetallic composite laminate materian and materials so produced especially for use in lightweight armor
US6357332B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 6, 1998 |
| Grant date | Mar 19, 2002 |
| Priority date | — |
| Expiry date | Aug 6, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/911
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Typically 20-40 films of a tough first metal, normally 0.1-1.0 mm thick films of titanium, nickel, vanadium, and/or steel (iron) and alloys thereof, interleaved with a like number of films of a second metal, normally 0.1-1.0 mm thick films of aluminum or alloys thereof, are pressed together in a stack at less than 6 MPa and normally at various pressures 2-4 MPa while being gradually heated in the presence of atmospheric gases to 600-800° C. over a period of, typically, 10+ hours until the second metal is completely compounded; forming thus a metallic-intermetallic laminate composite material having (i) tough first-metal layers separated by (ii) hard, Vickers microhardness of 400 kg/mm2+, intermetallic regions consisting of an intermetallic compound of the first and the second metals. The resulting composite material is inexpensive, lightweight with a density of typically 3 to 4.5 grams/cubic centimeter, and very hard and very tough to serve as, among other applications, lightweight armor. Upon projectile impact (i) the hard intermetallic, ceramic-like, layers are confined by the tough metal layers while (ii) cracking and fracturing is blunted and channeled in directions orthogo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.