Transmission-electron-microscopy study of alumina-fiber-reinforced magnesium composite. Final report
A detailed microstructral analysis of alumina (FP) fiber-reinforced ZE41A magnesium composite was performed by means of transmission electron microscopy (TEM). Fifty-five vol.% FP fiber-reinforced ZE41A magnesium composite thin foils were prepared by methods of mechanical polishing and ion thinning. Three major areas of interest in the composite microstructure were studied; the filaments, the interface (fiber/matrix reaction zone), and the matrix. In addition, the effects of heat treatments at 450 C on the composite microstructure were investigated. It was found that the alumina/magnesium interface consisted of a thin layer of magnesium aluminum oxide spinel and relatively large magnesium oxide (MgO) particles. A concentric layer of magnesium alloy grains encircling the alumina the magnesium matrix microstructures. Upon heat treatment at 450 C for 95 hours, polygonization of the magnesium matrix occurred while the spinel interfacial layer grew with decreasing magnesium oxide particle size.
- Research Organization:
- Army Materials Research Agency, Watertown, MA (USA). Materials Technology Lab.
- OSTI ID:
- 6417128
- Report Number(s):
- AD-A-179912/1/XAB; MTL-TR-87-7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360602* -- Other Materials-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
COMPOSITE MATERIALS
CRYSTAL STRUCTURE
ELECTRON MICROSCOPY
ELEMENTS
FIBERS
FILAMENTS
HEAT TREATMENTS
INTERFACES
LAYERS
MAGNESIUM
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATERIALS
METALS
MICROSCOPY
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PARTICLES
POLISHING
REINFORCED MATERIALS
SIZE
SURFACE FINISHING