Aluminum Perlite Syntactic Foams
Abstract
:1. Introduction
2. Materials and Methods
3. Results and Discussions
3.1. The Sintered Samples
3.2. Samples 3D Structure
3.3. Compression Test Results
4. Conclusions
- Metallic foams are attracting increasing interest due to the unique combination of physical and mechanical properties such as low density and high specific strength.
- Syntactic metallic foams were successfully produced by Spark Plasma Sintering using aluminum and expanded perlite.
- The particle size of expanded perlite in the sintered samples measured by SEM is in accordance with those resulted by image reconstruction of structures based on μCT. The results confirm that the pressure applied during the Spark Plasma Sintering was enough for good sinterability, preserving at the same time the filler particles.
- Samples with a content of 70, 80 vol% show the specific behavior of syntactic foams to compressive loadings, while those having 60 vol% behave similarly to the bulk aluminum.
- Compression and plateau strengths are in the range reported in literature for this type of materials.
- The best results were obtained for a fraction of 70 vol% expanded perlite, with a value of absorbed energy of 7.49 MJ/m3 and an efficiency of 90%.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Perlite Amount (%vol.) | Density (g/cm3) | Porosity (%) |
---|---|---|
60 | 1.73 | 35.9 |
70 | 1.23 | 54.4 |
80 | 1.16 | 57.0 |
Perlite Amount (%vol.) | Compression Strength (MPa) | Plateau Strength (MPa) | Absorbed Energy (MJ/m3) | Energy Absorption Efficiency (%) |
---|---|---|---|---|
70 | 18 | 18 | 7.49 | 90 |
80 | 12 | 12.5 | 3.22 | 70 |
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Thalmaier, G.; Sechel, N.A.; Csapai, A.; Popa, C.O.; Batin, G.; Gábora, A.; Mankovits, T.; Vida-Simiti, I. Aluminum Perlite Syntactic Foams. Materials 2022, 15, 5446. https://doi.org/10.3390/ma15155446
Thalmaier G, Sechel NA, Csapai A, Popa CO, Batin G, Gábora A, Mankovits T, Vida-Simiti I. Aluminum Perlite Syntactic Foams. Materials. 2022; 15(15):5446. https://doi.org/10.3390/ma15155446
Chicago/Turabian StyleThalmaier, György, Niculina Argentina Sechel, Alexandra Csapai, Catalin Ovidiu Popa, Gabriel Batin, Andras Gábora, Tamas Mankovits, and Ioan Vida-Simiti. 2022. "Aluminum Perlite Syntactic Foams" Materials 15, no. 15: 5446. https://doi.org/10.3390/ma15155446