发明名称 |
Apparatus and method for forming densified, carbon-carbon composites |
摘要 |
An apparatus and method for forming a densified carbon-carbon composite. The apparatus includes: a green part molding station for forming a green part; a carbonization station for carbonizing the green part; and an impregnation station for impregnating the carbonized part with a substantially curing by-product free, high carbon yield resin. The impregnation station includes a mold forming a sealed enclosure configured in the shape of the carbonized part for receiving the carbonized part and a vacuum source for evacuating the mold. At least one resin injection port is in the mold and a supply of substantially curing by-product free, high carbon yield resin is connected to the resin injection port for injection into the mold. In the preferred embodiment, the substantially curing by-product free, high carbon yield resin is a cyanate ester having a viscosity of less than about 100 cps at 250° F. and a carbon yield value of greater than about 60 wt. %. The combination of a high carbon yield resin and a pressurized impregnation station configured to the shape of the composite part for use with a curing by-product free resin provides for a substantial reduction in the number of carbonization cycles required to reach final density while, at the same time avoids the environmental and safety problems of a solvent-based system.
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申请公布号 |
US6325608(B1) |
申请公布日期 |
2001.12.04 |
申请号 |
US19990313232 |
申请日期 |
1999.05.17 |
申请人 |
NORTH CAROLINA A&T STATE UNIVERSITY |
发明人 |
SHIVAKUMAR KUNIGAL N.;AVVA VISHNU SARMA;SUNDARESAN MANNUR J.;ABALI FELIX;CUNNINGHAM ANTHONY;SADLER ROBERT L. |
分类号 |
C04B35/83;F16D69/02;(IPC1-7):B29C70/36 |
主分类号 |
C04B35/83 |
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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