Paper Title:
Structural Properties and Stability of Metastable Phases in the Zr-Nb System
  Abstract

The lattice parameters of the bcc (b) and omega (W) phases occurring metastably in a series of Zr-rich Zr-Nb alloys have been determined at and above room temperature (TR) using neutron diffraction techniques. In the first place, the effect of temperature changes upon the lattice parameters of the b and W phases in alloys with 10 and 18 at.% Nb was monitored using neutron thermodiffraction. A method of analysis is applied to the data which involves a confrontation between the observed structural properties and an idealised -or ``reference'- behaviour (RB) which admits a simple mathematical description. A generalised form of Vegard's law is adopted as RB for the b phase, whereas a specific RB is proposed for the W structure. The experimental data are well accounted for by this interpretation scheme, leading to a picture of the isothermal reactions occurring at high temperature which involves the transfer of Nb from the W to the b phase. Finally, the neutron diffraction data on the W phase are combined with an electron microscopy study for the alloy with 10 at.% Nb aged at 773 K, which provides information on the composition of this phase and its evolution towards thermodynamic equilibrium.

  Info
Periodical
Materials Science Forum (Volumes 480-481)
Edited by
A. Méndez-Vilas
Pages
565-572
DOI
10.4028/www.scientific.net/MSF.480-481.565
Citation
G. Aurelio, A. Fernández Guillermet, G.J. Cuello, P.B. Bozzano, "Structural Properties and Stability of Metastable Phases in the Zr-Nb System", Materials Science Forum, Vols. 480-481, pp. 565-572, 2005
Online since
March 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: David Fuks, Simon Dorfman, Vlad Liubich, Larisa Kutsenko, Helmut Mehrer
Abstract:Nonempirical study of the site preference occupation for Ni and V substituting in Fe3Al has been carried out in the framework of the coherent...
81
Authors: Hi Won Jeong, Seung Eon Kim, Chang Yong Jo, Yong Tae Lee, Joong Kuen Park
Abstract:The titanium alloys containing the Nb transition elements have been investigated as the Ni-free shape memory and the biomedical alloys with...
1669
Authors: Kinichi Masuda-Jindo, Vu Van Hung, P.E.A. Turchi
Abstract:The thermodynamic properties of high temperature metals and alloys are studied using the statistical moment method, going beyond the...
205
Authors: Qiong Wu, Chang Sheng Li, Hua Tang, Xiao Hui Yu, Ke Sheng Cao, Jing Hai Yang
Abstract:Face centered cubic Ti3Si nanoparticles were synthesized by mechanical alloying process and the structural and compositional evolutions...
177
Authors: H. Kaffash, Ali Shokuhfar, Hamid Reza Rezaie, Ehsan Mostaed, Ali Mostaed
Abstract:Fabrication of alloys in the solid state via mechanical alloying (MA) process has been studied by earlier researchers. The effects of milling...
1262