Hypereutectic heat storage alloy: Final report, Silicon shell integrity in molten Al-Si eutectic

Technical Report · Wed Jun 01 00:00:00 EDT 1988

OSTI ID:6928390

Bennett, M R; Braunstein, J

As a part of a program to evaluate the feasibility of using silicon encapsulated spheres of aluminum--silicon eutectic for thermal energy storage at temperatures near 650/degree/C, experiments were done to test the dimensional stability of the interface between silicon and the eutectic to thermal cycling. Cycled samples were sectioned and examined by optical micrography and by electron microscopy (SEM/EDX) techniques. Little or no degradation of the interface was observed at 600/degree/C (eutectic temperature 577/degree/C) while catastrophic degradation occurred at 700/degree/C. AT 650/degree/C interpenetration of 0.1/endash/0.2 mm was observed between the silicon and the eutectic alloys, with occasional larger (3/endash/4 mm) intrusions. 11 refs., 15 figs., 3 tabs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6928390
• Report Number(s): ORNL/TM-10380; ON: DE88013352
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
ALUMINIUM ALLOYS
SPHERES
SILICON
HEAT STORAGE
ELECTRON MICROSCOPY
ENCAPSULATION
EXPERIMENTAL DATA
FLOWSHEETS
FREEZING
LABORATORY EQUIPMENT
MELTING
PHASE DIAGRAMS
PROGRESS REPORT
ALLOYS
DATA
DIAGRAMS
DOCUMENT TYPES
ELEMENTS
ENERGY STORAGE
EQUIPMENT
INFORMATION
MICROSCOPY
NUMERICAL DATA
PHASE TRANSFORMATIONS
SEMIMETALS
STORAGE
250600* - Energy Storage- Thermal