Microstructural evolution of Al-Ni-Y powders an with different sizes
Artikel i vetenskaplig tidskrift, 2005

An Al-10Ni-8Y (at.%) alloy was atomized by Ar gas atomization in a close-coupled nozzle atomizer. The microstructure, phase composition, and thermal stability of the as-atomized powder were investigated by scanning electron microscopy, transmission electron microscopy, X-ray diffraction analysis and differential scanning calorimetry. Activation energies for different crystallization reactions were calculated using both Kissinger and Ozawa methods. The supercooled liquid region DeltaT(x) (= T(x) - T(g), where T(x) and T(g) are crystallization onset temperature and glass transition temperature, respectively) was detected to be in the range of 14-24 K. Also presented were attempts to determine the critical particle size for amorphous structure.

Författare

Y. Liu

Z. M. Liu

Y. Du

B. Y. Huang

J. S. Huang

S. Q. Chen

F. X. Liu

Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques

0044-3093 (ISSN)

Vol. 96 83-88

Ämneskategorier

Metallurgi och metalliska material