- Title
- Miscibility gap alloys with a ceramic matrix for thermal energy storage
- Creator
- Reed, Samuel; Kisi, Erich
- Relation
- SN Applied Sciences Vol. 2, Issue 12, no. 2148
- Publisher Link
- http://dx.doi.org/10.1007/s42452-020-03942-1
- Publisher
- Springer
- Resource Type
- journal article
- Date
- 2020
- Description
- New miscibility gap alloys with a ceramic matrix have been explored in the ZrO2–Al, AlN–Al, AlN-(Al–Si), Al2O3–Al and MgO–Al systems with a view to creating oxidation-resistant macroscopically solid, phase change-enhanced, thermal energy storage materials. Materials were manufactured by mixing the components, pressing and firing at 700 °C under argon. Oxidation tests at 700 °C in air for up to 72 h showed a mix of responses. Despite favourable thermodynamic properties of some published Ellingham diagrams, samples in the ZrO2–Al system underwent a strong exchange reaction, which did not result in a useful material. In the AlN–Al, AlN–(Al–Si) systems, viable MGA-type materials with encapsulated Al particles providing latent heat storage within a solid matrix were formed. There was no degradation of the materials after 24 h of oxidation testing; however, severe oxidation of the Al or Al–Si was observed after 72 h. The Al2O3–Al and MgO–Al systems not only formed a viable ceramic matrix material after firing, but also showed no signs of Al oxidation after 72 h in air at 700 °C. These results open up a promising new series of thermal energy storage materials, some of which appear to have very good oxidation resistance under the test conditions.
- Subject
- thermal energy storage; miscibility gap alloys; phase change materials; high thermal conductivity; differential thermal analysis; x-ray diffraction
- Identifier
- http://hdl.handle.net/1959.13/1497899
- Identifier
- uon:54466
- Identifier
- ISSN:2523-3971
- Language
- eng
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