Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 505, Issue 1-2, Pages 151-156Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2008.12.045
Keywords
Nanocomposites; Nanocrystalline microstructure; Arc plasma; Hot-press; Mechanical properties
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Funding
- National Natural Science Foundation of China [50371083]
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To improve the specific strength and stiffness of Al-based composites, AlN/Al nanoparticles were in-situ synthesized by arc plasma evaporation of Al in nitrogen atmosphere and consolidated by hot-pressing to fabricate AlN nanoparticle-reinforced nanocrystalline Al composites (0-39 vol.% AlN). Microstructure characterization shows that AIN nanoparticles homogeneously distribute in the matrix of Al nanocrystalline, which forms atomically bonded interfaces of AlN/Al. The hardness and the elastic modulus of the nanocomposite have been improved dramatically, up to 3.48 GPa and 142 GPa, respectively. Such improvement is believed to result from the grain refinement strengthening and the interface strengthening (load transfer) between the Al matrix and AlN nanoparticles. (C) 2008 Elsevier B.V. All rights reserved.
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