Author： Grylls R. J. Bewlay B. P. Lipsitt H. A. Fraser H. L.
Publisher： Taylor & Francis Ltd
ISSN： 0141-8610
Source： Philosophical Magazine. A. Physics of Condensed Matter. Defects and Mechanical Properties, Vol.81, Iss.8, 2001-08, pp. : 1967-1978
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
The present paper describes the morphology, chemistry and crystallography of silicide precipitates that were observed in Nb-Si and Nb-Ti-Si solid solutions. Although the stable structure of Nb3Si is tetragonal (tP 32), within the bcc Nb solid solution, fine-scale Nb3Si precipitates were observed with a metastable orthorhombic crystal structure. These precipitates were observed with an acicular morphology, and with sizes ranging from 2nm to 1m in the assolidified condition. The orientation relationship between these precipitates and the Nb matrix is (100)//(100) and [010]//[010]. It is suggested that the metastable orthorhombic structure forms owing to ease of nucleation of this structure in the bcc Nb matrix. The crystallography of these precipitates is described, and these findings are compared with previous data on the Nb-Si system.
Related content
Access to resources
Recommend
Interdiffusion in compositionally modulated amorphous Nb/Si multilayers
By Zhang M. Yu W. Wang W.H. Wang W.K.
Thin Solid Films, Vol. 287, Iss. 1, 1996-10 ,pp. :
Structural and electrical properties of superconducting Nb/Si multilayers
By Vavra I. Lobotka P. Derer J. Wallenberg L.R.
Vacuum, Vol. 50, Iss. 1, 1998-05 ,pp. :