TITLE

Structural evolution and property changes in Nd[sub 60]Al[sub 10]Fe[sub 20]Co[sub 10] bulk metallic glass during crystallization

AUTHOR(S)
Zhang, Zhi; Xia, Lei; Wang, Ru Ju; Wei, Bing Chen; Pan, Ming Xiang; Wang, Wei Hua
PUB. DATE
December 2002
SOURCE
Applied Physics Letters;12/2/2002, Vol. 81 Issue 23, p4371
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The structural evolution and property changes in Nd[sub 60]Al[sub 10]Fe[sub 20]Co[sub 10] bulk metallic glass (BMG) upon crystallization are investigated by the ultrasonic method, x-ray diffraction, density measurement, and differential scanning calorimetry. The elastic constants and Debye temperature of the BMG are obtained as a function of annealing temperature. Anomalous changes in ultrasonic velocities, elastic constants, and density are observed between 600-750 K, corresponding to the formation of metastable phases as an intermediate product in the crystallization process. The changes in acoustic velocities, elastic constants, density, and Debye temperature of the BMG relative to its fully crystallized state are much smaller, compared with those of other known BMGs, the differences being attributed to the microstructural feature of the BMG.
ACCESSION #
8563570

 

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