Ultra-high temperature metal matrix composites are to be constructed using a sufficiently strong refractory matrix. Oxide fibres are primary candidates to reinforce molybdenum matrix by the internal crystallisation method. However, strong molybdenum alloys have not been used as the matrix until recently because the matrix preparation requires the alloys in form of foil and wire, which are not available. Hence, a way to strengthen pure molybdenum is now found through introducing reinforcing phases into it on the stage of matrix preparation prior to its reinforcement by oxide fibres. This communication presents the results of first experiments which show that such modification of the matrix yields composites of high strength at temperatures up to 1400°C. The composites are characterized by sufficiently high fracture toughness at room temperature.

超高温金属基复合材料应使用足够坚固的耐火基体制成。氧化物纤维是通过内部结晶法增强钼基体的主要候选材料。但是，直到最近，强钼合金才被用作基体，因为基体的制备需要箔和线材形式的合金，而这种合金尚无法获得。因此，现在发现了一种通过在基质制备阶段通过在氧化物纤维进行增强之前将增强相引入其中来增强纯钼的方法。该信息提供了第一批实验的结果，这些结果表明，对基质的这种改性可在高达1400°C的温度下产生高强度的复合材料。该复合材料的特征在于在室温下足够高的断裂韧性。