Micro-crystalline C14 Laves phase in melt-spun AB(2) type Zr-based alloy

The single phase of micro-crystalline C14 Laves of Zr0.7Ti0.3(NiVMnCr)(2.1) alloy was successfully prepared by melt-spinning processing with a certain cooling rate. The investigation with XRD Rietveld analysis and TEM showed that micro-crystalline C14 Lavas phase had a unique microsructure, the grai n was composed of staked c-axis textured thin plates which contained a lot of crystallites with the mean size of about 3.1x3.1X1 nm(3). The electroche mical measurement showed that it had longer cycle life, more activation cyc les and lower discharge capacity than those of conventional mixture C14+C15 Laves phase. (C) 2000 Elsevier Science S.A. All rights reserved.