# US 2017/0282269 A1 · Shaping of amorphous metal alloys > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0282269 A1 - Document ID: US20170282269A1 - Status: Published application - Kind: A1 - Application number: 15/506,554 - Filed: 2015-08-25 - Published: 2017-10-05 - Earliest claimed: 2014-08-26 - Assignees: Morgan Advanced Ceramics, Inc. - Applicants: Morgan Advanced Ceramics, Inc. - Inventors: Alan DEMMONS; Keith FERGUSON; Anthony ARENA - Web page: https://patentgrep.com/patent/US20170282269A1 ## CPC - B23K 1/0008: {specially adapted for particular articles or work} - B21D 26/021: Deforming sheet bodies - B23K 1/19: taking account of the properties of the materials to be soldered - B23K 35/0233: {Sheets or foils (B23K35/0244 takes precedence)} - C22C 45/00: Amorphous alloys (making amorphous non-ferrous alloys C22C1/11) - C22C 45/04: with nickel or cobalt as the major constituent - C22C 2200/02: Amorphous - B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM - B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F) - C22C: ALLOYS (treatment of alloys C21D, C22F) ## Abstract Disclosed is a method of brazing articles together to form at least one braze defined by complementarily curved faying surfaces on the articles, the faying surfaces each having at least one region of curvature comprising at least one point from which the surface curves in more than one direction, the method comprising the steps of: a) disposing between the complementarily curved faying surfaces at least one amorphous brazing alloy preform of complementary curvature at least in part to said at least one region of the complementarily curved faying surfaces to conform to the complementarily curved faying surfaces in said region; and b) heating the articles and at least one amorphous brazing alloy preform to a brazing temperature at which the amorphous brazing alloy flows and brazes. and brazing alloy preforms for use in such methods. Methods of forming an article comprising a curved surface from a sheet of an amorphous metal alloy are disclosed, by applying heat from a fluid to a sheet of the amorphous metal alloy to raise at least a portion of the sheet to a temperature above the glass transition temperature Tg and below the crystallization temperature Tx. ## Claims ### Claim 1 A method of brazing articles together to form at least one braze defined by complementarily curved faying surfaces on the articles, the complementarily curved faying surfaces each having at least one region of curvature comprising at least one point from which the surface curves in more than one direction, the method comprising the steps of: a) disposing between the complementarily curved faying surfaces at least one amorphous brazing alloy preform of complementary curvature at least in part to said at least one region of the complementarily curved faying surfaces to conform to the complementarily curved faying surfaces in said region; and b) heating the articles and at least one amorphous brazing alloy preform to a brazing temperature at which the amorphous brazing alloy flows and brazes. ### Claim 2 (depends on 1) A method as claimed in claim 1 in which steps a) and b) are separated by transitional process steps. ### Claim 3 (depends on 1) A method as claimed in claim 1, in which initial process steps precede step a). ### Claim 4 (depends on 1) A method as claimed in claim 1, in which succeeding process steps follow step b). ### Claim 5 (depends on 1) A method as claimed in claim 1, in which at said at least one point from which the surface curves in more than one direction, the radius of curvature is at least 3 mm in each said direction. ### Claim 6 (depends on 5) A method as claimed in claim 5, in which at said at least one point from which the surface curves in more than one direction, the radius of curvature is at least 50 mm in each said direction. ### Claim 7 (depends on 1) A method as claimed in claim 1, in which the amorphous brazing alloy preform has dimensions in two orthogonal directions of greater than 100 mm. ### Claim 8 A method of forming an article comprising a curved surface from a sheet of an amorphous metal alloy, having a glass transition temperature Tg and crystallization temperature Tx, the article comprising a surface having at least one region of curvature comprising at least one point from which the surface curves in more than one direction, the method comprising the step of applying heat from a fluid to a sheet of the amorphous metal alloy to raise at least a portion of the sheet to a temperature above the glass transition temperature Tg and below the crystallization temperature Tx, for a time sufficient to permit the sheet to deform to form the at least one region of curvature. ### Claim 9 (depends on 8) A method as claimed in claim 8, in which the fluid applies pressure to the sheet to deform the sheet. ### Claim 10 (depends on 8) A method as claimed in claim 8, in which the sheet deforms to make contact with a mold surface complementary to the at least one region of curvature. ### Claim 11 (depends on 8) A method as claimed in claim 8, in which the article comprising a curved surface is a brazing metal preform and the amorphous metal alloy is an amorphous metal brazing alloy. ### Claim 12 (depends on 8) A method as claimed in claim 8, in which at said at least one point from which the surface curves in more than one direction, the radius of curvature is at least 3 mm in each said direction. ### Claim 13 (depends on 12) A method as claimed in claim 12, in which at said at least one point from which the surface curves in more than one direction, the radius of curvature is at least 50 mm in each said direction. ### Claim 14 (depends on 8) A method as claimed in claim 8, in which the article has dimensions in two orthogonal directions of greater than 100 mm. ### Claim 15 A brazing metal preform comprising a sheet of an amorphous metal brazing alloy comprising a surface having at least one region of curvature comprising at least one point from which the surface curves in more than one direction with a radius of curvature in each said direction of at least 3 mm. ### Claim 16 (depends on 15) A brazing metal preform as claimed in claim 15, comprising a part cylindrical section and a part conical section. ### Claim 17 (depends on 15) A brazing metal preform as claimed in claim 15, comprising a cylindrical section and a conical section. ### Claim 18 (depends on 15) A brazing metal preform as claimed in claim 15, comprising a domed section and a flat section. ### Claim 19 (depends on 15) A brazing metal preform as claimed in claim 15, in which at said at least one point from which the surface curves in more than one direction, the radius of curvature is at least 50 mm in each said direction. ### Claim 20 (depends on 15) A brazing metal preform as claimed in claim 15, in which the amorphous brazing alloy preform has dimensions in two orthogonal directions of greater than 100 mm. ### Claim 21 (depends on 15) A brazing metal preform as claimed in claim 15, mounted to a support. ### Claim 22 (depends on 1) A product formed at least in part using the method of claim 1. ### Claim 23 (depends on 8) A product formed at least in part using the method of claim 8.