NMR-STUDY OF NANOPHASE AL AL-OXIDE POWDER AND CONSOLIDATED COMPOSITES/

Al-27 Nuclear Magnetic Resonance (NMR) measurements from aluminum powd ers and consolidated nanophase aluminum made from those powders are pr esented. The signals from the metal and surface oxidation are easily s eparated and are compared before and after consolidation. The results presented indicate that the oxide coating becomes the interface region within the nanophase composite material and that during consolidation the metal has undergone a deformation equivalent to that seen for bul k material under a compressive strain of between 4% and 8%.