ISSN:
1662-8985
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:
A crystallization process in an amorphous state under isothermal condition is examinedfor binary alloys ZrNi and ZrNi2 by differential thermal analysis (DTA). Time dependence of DTAcurves is measured at several constant temperatures just below crystallization temperature. Thefraction of crystallized volume in amorphous state and its time evolution during isothermalannealing are measured. These data are analyzed by the Johnson-Mehl–Avrami formula. TheAvrami exponent is 2.4±0.1 for ZrNi and 3~4 depending on the set temperature for ZrNi2. Theactivation energy for crystallization of amorphous ZrNi and ZrNi2 was estimated by plots of lnt1/2vs. 1/T
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.675.pdf
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