Reactively Synthesized Nanostructured PM Aluminium Composite – Microstructure Stability and Elevated Temperature Hardness Response

Authors

  • S. Kleiner,

    1. Laboratory for Materials Technology Thun, Empa Materials Science and Technology, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland
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  • F. Bertocco,

    1. Laboratory for Materials Technology Thun, Empa Materials Science and Technology, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland
    2. On leave from Universidade Federal de Santa Catarina, 88040-900 Florianopolis, SC, Brasil
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  • F. A. Khalid,

    1. Laboratory for Materials Technology Thun, Empa Materials Science and Technology, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland
    2. On sabbatical leave from GIK Insitute of Engineering Sciences and Technology, Topi 2346, NWFP, Pakistan
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  • O. Beffort

    1. Laboratory for Materials Technology Thun, Empa Materials Science and Technology, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland
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Abstract

Reactive synthesis by mechanical alloying and subsequent hot consolidation is an appropriate way to produce an Al-Al3Ti-Al2O3 nanocomposite from readily available and inexpensive aluminium powder and nanosized TiO2. This processing route provides a fine grained and thermally stable microstructure with a controllable amount of dispersoids. The respective material shows a high hardness at room and elevated temperature and does not suffer from softening during long-term annealing at 250°C. It is therefore considered to be a promising light-weight material for elevated temperature applications.

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