以孔隙规则排列的Al_2O_3多孔陶瓷为骨架,制备了多孔Al_2O_3陶瓷/Al_2O_3超微粉/环氧树脂新型复合材料.研究了三维连通陶瓷骨架对复合材料力学性能和高温尺寸稳定性的影响.研究结果表明,新型复合材料具有更优越的室温和高温力学性能.当陶瓷骨架含量为16.8%时,其室温的抗弯强度、抗弯模量、抗压强度和抗压模量分别为115.5MPa、3.6GPa、170.2MPa、2.4GPa.在120℃压缩时,其抗压强度、抗压模量分别为47.8MPa、0.9GPa.新型复合材料具有良好的高温尺寸稳定性,在180℃尚未发现变形.
Porous Al_2O_3 ceramic/Al-2O_3 ultrafine particle/epoxy new composites were fabricated using the ordered Al_2O_3 porous ceramic as the frame.The effect of 3D interpenetrated Al_2O_3 ceramic on the mechanical property and dimensional stability at high temperature of new composites was studied.The results showed the new composites had better mechanical properties at room temperature and high temperature.At room temperature,flexural strength,flexural modulus,compressive strength and compressive modulus of the composites with the porous Al_2O_3 ceramic frame of 16.8% were 115.5MPa,3.6GPa,170.2MPa,2.4GPa,respectively.At 120℃,compressive strength and modulus of the composites were 47.8MPa and 0.9GPa,respectively.The composites had good dimensional stability at high temperature and no deformation was observed at 180℃.
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