Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1990-12-07
1992-10-20
Powell, William A.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
1562728, 21912185, 264113, 264125, B27N 300, B32B 3100, B23K 900, B29C 6700
Patent
active
051566974
ABSTRACT:
A method and apparatus for selectively sintering a layer of powder to produce a part comprising a plurality of sintered layers. The apparatus includes a computer controlling a laser to direct the laser energy onto the powder to produce a sintered mass. The computer either determines or is programmed with the boundaries of the desired cross-sectional regions of the part. For each cross-section, the aim of the laser beam is scanned over a layer of powder and the beam is switched on to sinter only the powder within the boundaries of the cross-section. Powder is applied and successive layers sintered until a completed part is formed. Preferably, the powder comprises a plurality of materials having different dissociation or bonding temperatures. The powder preferably comprises blended or coated materials, including precursor materials which are formed into a mass at the irradiated locations, and which either react due to the laser thermal energy or in a later heat treatment to form a compound with properties different than the precursors. Examples are disclosed wherein a compound is formed which has a significantly higher melting point than that of one or more of the precursor powders.
REFERENCES:
patent: 4117302 (1978-09-01), Earle et al.
patent: 4300474 (1981-11-01), Livsey
patent: 4323756 (1982-04-01), Brown et al.
patent: 4474861 (1984-10-01), Ecer
patent: 4575330 (1986-03-01), Hull
patent: 4752352 (1988-06-01), Feygin
patent: 4863538 (1989-09-01), Deckard
patent: 4938816 (1990-07-01), Beaman et al.
patent: 4944817 (1990-07-01), Bourell et al.
Leont'Ev, "Lazernaja Poverhnostja Obrabotka Metallor I Splavor," (1986), pp. 120-123.
Takei, et al., "Rhenium Film Preparation By Laser Melting," J. Appl. Phys. 51(5) (May 1980), pp. 2903-2908.
Magee, et al. "Laser-Induced Convesion of Molecular Precusors To Thin Films and Deposited Layers", Chem. Mater. 1990, 2 (1990), pp. 232-235.
Deckard, "Selective Laser Sintering," Doctoral Thesis (University of Texas, Dec. 1988).
Bourell David L.
Marcus Harris L.
Weiss Wendy L.
Board of Regents , The University of Texas System
Powell William A.
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