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Development of Lightweight Magnesium/Glass Micro Balloon Syntactic Foams Using Microwave Approach with Superior Thermal and Mechanical Properties
- Source :
- Metals; Volume 11; Issue 5; Pages: 827, Metals, Vol 11, Iss 827, p 827 (2021)
- Publication Year :
- 2021
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2021.
-
Abstract
- Magnesium matrix syntactic foams (MgMSFs) are emerging lightweight materials with unique capabilities to exhibit remarkable thermal, acoustic, and mechanical properties. In the current study, lightweight glass micro balloon (GMB)-reinforced Mg syntactic foams were synthesized via the powder metallurgy technique using hybrid microwave sintering. The processing employed in the study yielded MgMSFs with refined grain sizes, no secondary phases, and reasonably uniform distributions of hollow reinforcement particles. The developed MgMSFs exhibited densities 8%, 16%, and 26% lower than that of the pure Mg. The coefficient of thermal expansion reduced (up to 20%) while the ignition resistance improved (up to 20 °C) with the amount of GMB in the magnesium matrix. The MgMSFs also exhibited a progressive increase in hardness with the amount of GMB. Although the MgMSFs showed a decrease in the yield strength with the addition of GMB hollow particles, the ultimate compression strength, fracture strain, and energy absorption capabilities increased noticeably. The best ultimate compression strength at 321 MPa, which was ~26% higher than that of the pure Mg, was displayed by the Mg-5GMB composite, while the Mg-20GMB composite showed the best fracture strain and energy absorption capability, which were higher by ~39 and 65%, respectively, when compared to pure Mg. The specific strength of all composites remained superior to that of monolithic magnesium. Particular efforts were made in the present study to interrelate the processing, microstructural features, and properties of MgMSFs.
- Subjects :
- Materials science
Syntactic foam
Composite number
chemistry.chemical_element
02 engineering and technology
magnesium
mechanical properties
01 natural sciences
Thermal expansion
Specific strength
Powder metallurgy
0103 physical sciences
glass micro balloon
syntactic foam
powder metallurgy
microwave sintering
General Materials Science
Composite material
010302 applied physics
Mining engineering. Metallurgy
Magnesium
Metals and Alloys
TN1-997
021001 nanoscience & nanotechnology
Compressive strength
chemistry
0210 nano-technology
Microwave
Subjects
Details
- Language :
- English
- ISSN :
- 20754701
- Database :
- OpenAIRE
- Journal :
- Metals; Volume 11; Issue 5; Pages: 827
- Accession number :
- edsair.doi.dedup.....2392e9ce29412ae5076b62405a9540f4
- Full Text :
- https://doi.org/10.3390/met11050827