Amorphous and nanocrystalline Al82Ni10Y8 alloy powder prepared by gas atomization
Artikel i vetenskaplig tidskrift, 2005

An Al-10Ni-8Y (at.%) alloy was atomized by Ar gas and the morphology, microstructure, thermal stability, phase composition and microhardness of the as-atomized powder were investigated. Most of the powders are spherical in shape, but the surface morphology was different for powder of different size. The cross-section microstructure of powder with size below 15 Pro in diameter showed no detailed feature, indicating existence of amorphous phase or nanocrystalline structure. The as-atomized powder showed four distinct exothermic peaks when heated at 296, 340, 366 and 456 degrees C. The glass transition temperature T-g, crystallization temperature T-x, and the temperature interval of the supercooled liquid region Delta T-x(=T-x-T-g) were detected to be about 266, 288 and 22 degrees C. The Al82Ni10Y8 alloy powder exhibits a high Vickers hardness of 230.6, and shows great potential for structural application. (c) 2004 Elsevier Ltd. All rights reserved.

Författare

Y. Liu

Z. M. Liu

Y. Du

B. Y. Huang

J. S. Huang

S. Q. Chen

F. X. Liu

Intermetallics

0966-9795 (ISSN)

Vol. 13 393-398

Ämneskategorier

Metallurgi och metalliska material

DOI

10.1016/j.intermet.2004.07.026