发明名称 |
HERSTELLUNG VON GEGENSTÄNDEN DURCH VERBUNDBILDUNG VON VORBEHANDELTEN PULVERN |
摘要 |
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. |
申请公布号 |
AT171099(T) |
申请公布日期 |
1998.10.15 |
申请号 |
AT19920902653T |
申请日期 |
1991.12.06 |
申请人 |
BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM |
发明人 |
BOURELL, DAVID, L.;MARCUS, HARRIS, L.;WEISS, WENDY, L. |
分类号 |
B22F3/00;B22F3/10;B22F3/105;B22F3/23;B23K26/34;B28B11/24;B29C67/00;C04B35/64 |
主分类号 |
B22F3/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|