| Autor: |
Deng, Y. J., Li, L., Zhang, H. W., Huang, X. G., Ye, Z. J., Yao, Y. |
| Zdroj: |
Journal of Materials Engineering & Performance; Dec2024, Vol. 33 Issue 24, p13815-13823, 9p |
| Abstrakt: |
Percolation casting technology is used to produce alumina ceramic hollow spheres of different sizes that are neatly and tightly arranged according to certain rules. Then, aluminum metal melt infiltrates the gap of adjacent ceramic hollow spheres, forming a sphere-reinforced aluminum metal matrix syntactic foam (MMSF). To compare the mechanical properties between aluminum foam and MMSF, the same base material and pore size were used. Based on quasi-static testing, split Hopkinson pressure bar experiments were conducted on the MMSF and aluminum foam at different strain rates using pulse-shaping and high-speed photography techniques. The influence of alumina ceramic hollow spheres on the MMSF (including compressive strength, failure process, and energy absorption performance) was analyzed. Results indicate that the addition of alumina ceramic hollow spheres significantly enhances the compressive strength and energy absorption capacity of MMSFs. It also improves the strain rate sensitivity to some extent, rendering the composite formed by aluminum foam and ceramic hollow sphere to be strain rate-sensitive. Furthermore, the energy utilization efficiency and absorbed energy per unit volume of the MMSF were higher than those of the aluminum foam. The MMSF exhibited better strain rate sensitivity in terms of impact resistance than the aluminum foam; the higher the strain rate, the higher the absorbed impact energy. The MMSF has significant application prospects to aerospace engineering and explosion protection in the military. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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