| 摘要 |
<p>A fibre reinforced metal is made by introducing an array of fibres into a die, charging the die with molten metal by vacuum infiltration and then applying pressure by means of an inert gas to improve the penetration of the molten metal into the fibre array. Apparatus for producing a reinforced metal cylinder comprises a cylindrical former (2) onto which a composite fibre (3) of boron, silicon and carbon is wound. The former (2) forms an inner closure member for the die defining a cylindrical die cavity (8) with an outer die body (4). A central cavity (15) within the former (2) is for insertion of a heating element to facilitate the flow of metal through the cavity (8). The die cavity is evacuated via conduit (16) and molten metal is then drawn into the cavity via the passage (7). After charging the die with molten metal the conduit (16) is connected to a source of high pressure nitrogen. The die is then cooled while maintaining the pressure in the die cavity making use of a cooling stalk which replaced the heating element inside the spool.</p> |
