| 摘要 |
An in situ process is provided for producing a composite comprising a refractory material dispersed in a solid matrix. A molten composition comprising a matrix liquid, and at least one refractory carbide-forming component are provided, and a gas is introduced into the molten composition. A reactive component is also provided for reaction with the refractory material-forming component. The refractory material-forming component and reactive component react to form a refractory material dispersed in the matrix liquid, and the liquid composite is cooled to form a solid composite material. In one embodiment, the reactive component is a carbonaceous component in the form of a component of the gas, a solid in the gas or the molten composition, or both. The carbonaceous component is provided for reaction with a refractory carbide-forming component to yield a refractory carbide. In a preferred embodiment, the matrix liquid is molten aluminum and the refractory carbide-forming component is tantalum. In other embodiments, refractory borides or refractory nitrides are formed in situ in the matrix liquid.
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