| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1524616 | Materials Chemistry and Physics | 2011 | 7 Pages |
Abstract
⺠Al-Al2O3 nanocomposites were formed by in situ phase transformation during consolidation of high purity Al nanopowder. ⺠During HIP process at 550 °C, the native amorphous layer on the initial powder transformed into nanocrystalline alumina that was dispersed in the Al matrix. ⺠Final microstructure can be characterized as an Al matrix containing both ultrafine and coarse grains as well as embedded nanosized alumina dispersoids. ⺠The coarse grains in the matrix stopped the crack propagation during deformation thereby increasing the toughness of the composite. ⺠Filaments were formed between the fracture surfaces when the sample failed during compression at 200 °C in air, probably as a result of melting of aluminum due to oxidation.
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Authors
G. Dirras, J. Gubicza, D. Tingaud, S. Billard,