Abstract Mercury intrusion porosimetry has been conducted on a range of non-rigid, porous carbon fibre structures. Comparison with data from gas pressure infiltration experiments in a molten Al-Si alloy shows it to be a useful tool in determining the pressure required to produce Al metal matrix composites with low levels of porosity. Whilst for non-rigid fibre preforms, as studied here, it is difficult to pin-point every aspect of the infiltration process, the method does give an indication of critical aspects of the infiltration behaviour. Preforms made from loose and spread tow can be fully infiltrated at relatively low pressures (12 bar) and although metal can fill the spaces between fibre bundles within textile-based preforms at low pressures, densely-packed bundles are only infiltrated at higher pressures, usually in excess of 50 bar. Mercury intrusion porosimetry could provide a valuable and simple tool in the design of fibre-reinforced metal matrix composites with optimised structures that are easy to manufacture.

中文翻译：

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熔融金属压力辅助渗透到非刚性多孔碳纤维结构中

摘要 已经对一系列非刚性多孔碳纤维结构进行了压汞孔隙率测定。与熔融铝硅合金中气压渗透实验数据的比较表明，它是确定生产低孔隙率铝金属基复合材料所需压力的有用工具。虽然对于非刚性纤维预制件，正如这里所研究的，很难确定渗透过程的每个方面，但该方法确实给出了渗透行为的关键方面的指示。由松散和散布丝束制成的预制件可以在相对较低的压力 (12 bar) 下完全渗透，尽管金属可以在低压下填充基于纺织品的预制件内纤维束之间的空间，但密集的束只能在较高压力下渗透，通常超过 50 巴。