【摘要】 研究了闭孔泡沫铝合金孔结构参数对其超声衰减性能的影响。结果表明:闭孔泡沫铝合金在1-10 MHz范围內是一种具有良好超声衰减性能的轻质材料。其超声衰减系数α随孔径d的减小、孔隙率Ps的增加和比表面积Sv的增加而增大。更多还原

【Abstract】 Ultrasonic attenuation capacity of cellular Al alloy foam were studied. The results show that it is a light material that have good ultrasonic attenuation capacity between 1 MHz and 10 MHz. Ultrasonic attenuation coefficientαof cellular Al alloy foam increases with decreasing pore diameter d, with increasing porosity P and with increasing specific surface Sv.更多还原