| 摘要 |
1490347 Carbon coatings DUNLOP Ltd 23 Jan 1975 [8 Feb 1974] 05791/74 Heading ClA A friction member is prepared by (a) adhering a porous layer of carbon fibrous material or carbonizable fibrous material to a non-porous substrate with a carbonizable resin or pitch which is subsequently cured to effect a bond, (b) subjecting the porous layer to a chemical vapour deposition process whereby carbon is deposited thereon by the cracking of a hydrocarbon gas, the substrate being maintained at a higher temperature than the layer so that the vapour deposition of carbon proceeds progressively outwards from the substrate, through the fibrous layer to the exposed surface of the layer. The substrate is preferably of carbon, and the heating means may be high frequency electrical induction, or electrical resistance heating. |
