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Solid state amorphization in the CuTa alloy system

✍ Scribed by K Sakurai; Y Yamada; C.H Lee; T Fukunaga; U Mizutani

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
259 KB
Volume
134
Category
Article
ISSN
0921-5093

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✦ Synopsis

The mechanical alloying (MA) technique was applied to the Cu-Ta system, which has been known to be immiscible and never amorphized by the conventional rapid quenching technique. The possibility of the solid state amorphization of Cu30Ta70 powders was examined and it was found to proceed positively during MA. Experimental evidence that amorphization had taken place was demonstrated through X-ray diffraction, thermal analysis and extended X-ray absorption fine structure (EXAFS) studies. The present results suggest the importance of an energetically up-hill process through ball milling for amorphization of the system with a positive heat of mixing.

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