3的預(yù)制體。延長熱壓燒結(jié)時間會使開孔泡沫鋁的孔徑從0.48 mm增加到1.16 mm，孔隙率從64%增加到82%。壓縮實驗結(jié)果表明，不同孔隙結(jié)構(gòu)下泡沫體的宏觀變形特征基本相同，均表現(xiàn)出逐層塌陷的變形特征。此外，泡沫鋁的致密化應(yīng)變值、彈性模量、平臺屈服應(yīng)力和能量吸收能力均隨著孔隙率的增加而降低。當孔隙率為64%時，能量吸收能力最大（15.0 MJ·m-3）。;Nearly spherical NaCl particles prepared by a disc granulator were used to produce open-cell aluminum foams via infiltration casting. The average compressive strength of the salt balls is 3.9 MPa, and they can be completely collapsed within 5 min in the ultrasonic cleaner. By controlling the hot-pressure sintering duration as 0.5?2 h and the hot-pressing temperature at 700 °C, the preforms with bulk density of 0.66?0.83 g/cm3 can be prepared. Prolonging the duration of hot-pressure sintering can increase the pore size of the open-cell aluminum foams from 0.48 mm to 1.16 mm, and also increase the porosity from 64% to 82%. Compression test results show that the macroscopic deformation characteristics of the foams with different pore structures are basically the same, and they all exhibit the deformation characteristic of layer-by-layer collapse. In addition, the densification strain value, elastic modulus, plateau yield stress, and energy absorption capacity of open-cell aluminum foams are al decreased with increasing the porosity. The energy absorption capacity is the largest (15.0 MJ·m-3) when the porosity is 64%."/>