New application of HIP for carbon materials impregnated with metals
- Toyo Tanso Co., Ltd., Osaka (Japan)
Antimony, antimony-tin alloy and copper were impregnated into a high density isotropic graphite block. Impregnation was carried out by using an autoclave by pressurizing with nitrogen gas after immersing a graphite block into the molten metal. The standard impregnation condition employed was the temperature of 750 C for Sb and 600 C for Sb-Sn alloy under the pressure of 10 MPa for 1 hour, and for Cu, 1,250 C under a pressure of 12 MPa for 1 hour. Mechanical properties became about two times higher than those of the original graphite. Gas permeability of the Sb and Sb-Sn alloy impregnated graphite was reduced to the order of 10{sup {minus}7} cm{sup 2}/s from 10{sup {minus}1} cm{sup 2}/s for the original. Air oxidation rate was reduced by an order of two to one by Sb impregnation at the temperature range from 400 to 550 C. A pronounced improvement in rubbing test was obtained by the impregnation of Sb and Sb-Sn alloy. By Cu impregnation, electrical resistivity was reduced by a factor of four. Cu impregnation is expected to be utilized for the preparation of carbon slider for electric car.
- OSTI ID:
- 442817
- Report Number(s):
- CONF-960515-; ISBN 0-87170-568-0; TRN: IM9712%%242
- Resource Relation:
- Conference: International conference on hot isostatic pressing, Andover, MA (United States), 20-22 May 1996; Other Information: PBD: 1996; Related Information: Is Part Of Hot isostatic pressing: Conference proceedings; Froes, F.H.; Hebeisen, J.; Widmer, R. [eds.]; PB: 312 p.
- Country of Publication:
- United States
- Language:
- English
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