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摘要
In this paper, a novel aluminum matrix composites reinforced with 3D orthogonal woven fabric/ Al composite (3DOW/Al) is fabricated by gas pressure assisted liquid infiltration (GPI) method. The metal flow behaviors of inter-yarns and intra-yarn are investigated by multiscale simulations and experiments. The infiltration pressure and preheat temperature are the critical processing parameters in the forming of continuous carbon fiber-reinforced aluminum composites (CF/Al) composites. The threshold infiltration pressure is around 3 MPa, while the preheat temperature of fabric should be above the solidus of the matrix. The melt penetrates the interstices among yarns firstly due to the less flow resistance, then the internal fiber interstices in the yarns are filled gradually. The forming mechanism of microscopic intra-yarn voids and mesoscopic inter-yarns defects are clarified by the simulation in the mesoscopic and microscopic scale.
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单位南昌航空大学
