发明名称 |
PRODUCING PARTS BY COMPOUND FORMATION OF PRECURSOR POWDERS |
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 |
KR100225021(B1) |
申请公布日期 |
1999.10.15 |
申请号 |
KR19937001678 |
申请日期 |
1993.06.04 |
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;(IPC1-7):B29C67/00 |
主分类号 |
B22F3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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