ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The magnetic, mechanical or chemical properties of nanocrystalline materials stronglydiffer from the ones of their coarse-grained counterparts. Moreover, significant changes of the phasediagrams were already evidenced for nanostructured alloys. Thermal processing with or withoutapplied pressure controls the microstructure development at the nanometer scale and thus essentiallydecides upon the final nanomaterial behaviour and properties. A common route for the synthesis ofmetallic nanomaterials is the devitrification of amorphous precursors obtained via non-equilibriumprocessing, e.g. by rapid solidification or high-energy ball-milling. Time-resolved in-situ X-raydiffraction experiments may nowadays be performed at high-brilliance synchrotron radiationsources for a variety of temperature-pressure conditions. The temperature-time evolution of thegrain-size distribution and microstrain can be monitored in detail at specimen-relevant scales.Together with local information from electron microscopy and chemical analysis, in-situ X-rayexperiments offer a complete set of tools for engineering of the microstructure in nanomaterials.The effect of individual processing steps can be distinguished clearly and further tuned. An exampleis provided, concerning the high-temperature microstructure development in Co-rich soft magneticnanostructured alloys
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.550.607.pdf
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