| [Wang Zhaoming,Liu Yuan,Xu Fating,Wan Tan and Jin Yunxue.Pore Structure and Compressive Properties of Open-Cell Aluminum Foams Prepared by Infiltration Casting Based on NaCl Space-Holder[J].Rare Metal Materials and Engineering,2023,52(1):119~124.] |
| Pore Structure and Compressive Properties of Open-Cell Aluminum Foams Prepared by Infiltration Casting Based on NaCl Space-Holder |
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| Received:April 28, 2022 Revised:May 21, 2022 |
| DOI： |
| Key words: NaCl beads open-cell aluminum foams hot-pressure sintering compressive properties |
| Foundation item:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| Abstract: |
| 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%. |
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