| 摘要 |
A carbon or carbonizable fibrous structure (1) is disclosed such as is particularly, though not exclusively, applicable to the manufacture of preforms for use in the production of friction products and to hollow, heat-resistant structures. The structure (1) comprises a layered tube including an innermost layer (2), an outer layer (3) and at least one intermediate layer (4). The intermediate layer (4) is formed from a material (5) comprising carbon yarn or precursor carbon yarn in the form of a substrate (6) with a pile (7; 10) projecting from at least one side thereof. Preferably, the substrate (6) is woven and has piles (7, 10) projecting from both sides thereof. Preferably also, the pile (7; 10) has been raised from the substrate (6) by fracturing the yarns making up the substrate (6), for example by needling, carding or abrading the substrate (6). A method of manufacturing such a structure (1) is also disclosed. |
