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:
In this study, rod type Cu54Ni6Zr22Ti18 bulk amorphous alloy fabricated by warmextrusion of amorphous powders was investigated. To get bulk type amorphous alloy, theCu54Ni6Zr22Ti18 amorphous powders which has a particle size below 63( and wide supercooledliquid region of 53K were prepared by a high-pressure gas atomization method. The powders werefilled in a Cu can with an inner dimension 20×2×50mm in air, evacuated, sealed and then precompactedin the press. Before extrusion, the billet was heated with heating rate of 50K/min andthe holding time was about 5min. The extrusion temperature was 723K and the extrusion ratio wasincreased from 2 to 5. By warm extrusion of amorphous powders, a fully amorphousCu54Ni6Zr22Ti18 bulk type alloys were successfully synthesized. The conditions for extrusion weredecided based on the time-temperature-transformation curve and DSC analysis. Phase analysis wasperformed by XRD. The result of the phase analysis indicated that Cu54Ni6Zr22Ti18 bulk rod typesamples having fully amorphous phase could be obtained until extrusion ratio of 4 at extrusiontemperature of 723K, but partial crystalline phase would be observed in the bulk rod type alloyfabricated at extrusion ratio of 5
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.534-536.281.pdf
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