发明名称 |
Fiber-reinforced Al-Li compressor airfoil and method of fabricating |
摘要 |
A metal matrix composite lightweight compressor airfoil. The airfoil comprises a braided fabric embedded in a lightweight aluminum-lithium alloy. The airfoils are fabricated by forming a plurality of fiber tows by twisting filaments or fibers. The tows are then braided into a fabric. The fabric may be impregnated with an optional fugitive polymer that temporarily occupies interstices of the fabric to facilitate handling of the pre-formed braided fabric, but which is subsequently removed. The airfoil may then be formed as a MMC by one of two separate methods. In the first method, aluminum-lithium alloy is pressure augmented casting into a die that includes a preform of fabric impregnated with fugitive polymer. In a second method, a preform is formed using a tool and mandrel by impregnating fabric with aluminum-lithium alloy. Then aluminum-lithium alloy is pressure augmented cast into a die that includes the alloy-impregnated preform. |
申请公布号 |
EP2474638(A2) |
申请公布日期 |
2012.07.11 |
申请号 |
EP20110194758 |
申请日期 |
2011.12.21 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
CAIRO, RONALD RALPH;CHEN, JIANQIANG |
分类号 |
C22C47/12;B22D19/14;C22C47/06;C22C47/20;C22C49/06;F04D29/02;F04D29/38 |
主分类号 |
C22C47/12 |
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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