Formation of transition metal silicides by solid–gas reactions: thermodynamic and kinetic considerations

Autor:	Klaus Bohmhammel, R Otto, I. Röver, Jörg Acker, Gerhard Roewer
Rok vydání:	2001
Předmět:	Chemistry Kinetics Halide Mineralogy chemistry.chemical_element General Chemistry Condensed Matter Physics Isothermal process chemistry.chemical_compound Nickel Transition metal Electrical resistance and conductance Silicide Physical chemistry General Materials Science Powder diffraction
Zdroj:	Solid State Ionics. :583-591
ISSN:	0167-2738
DOI:	10.1016/s0167-2738(01)00768-8
Popis:	Alternative synthesis routes to nickel silicides are discussed. Results of the reactions of Ni with a SiCl4/H2 gas mixture (1), of NiSi with NiCl2 (2) as well as of Si with nickel halides (3) are presented. Kinetics of the reactions (1) and (2) were studied in detail by in situ electrical resistance measurements and isothermal X-ray powder diffraction, respectively. Kinetic evaluation of the electrical resistance measurement data points to island and layered silicide growth in process (1). XRD data analysis leads to the conclusion that process (2) proceeds via transient metastable nickel silicide phases, which are interrelated with the thermodynamically stable silicide phases Ni2Si, Ni3Si2 and NiSi.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dff4b90b8ebf87d18d6d78dec3357d93 https://doi.org/10.1016/s0167-2738(01)00768-8 Zobrazit plný text záznamu Full Text from ScienceDirect