The mechanism of periodic layer formation during solid-state reaction between Mg and SiO2

Microstructure evolution of periodic layers formed during solid state reaction between Zn and Ni3Si

“…substrate A jajbjaj.jbjajbjajbj substrate B). Unfortunately, this assembly type has been proved not in accord with the experimental observations of almost all of the known systems [19], because the periodic-layered structure is actually composed of the two-phase layers of (a þ b) and the single-phase layers of a (i.e. substrate A jaja þ bjaj.ja þ bjaja þ bjaja þ bj substrate B).…”

Feathery structure discovered in the reaction zone of diffusion couple Zn/CuTi2

“…According to the diffusion-induced stresses model [7][8][9], to form the aggregate structure or the periodic-layered structure in the Zn/CuTi 2 diffusion couple is mainly dependent on the interface coefficient of Ti, while the reaction velocity of the system Zn/CuTi 2 relates closely to the interface coefficient of Cu at the reaction front, or the kinetic diffusion coefficient of Zn within the reaction zone. Therefore, corresponding to the crystal planes of CuTi 2 with very small interface coefficients of Ti, it is possible to form the periodic-layered structure during the solid-state reaction.…”

Controlled preparation of silicon and magnesium silicide on silica glass substrate through magnesiothermic reduction

“…The magnesiothermic reduction has also been applied to silica glass substrates and quartz crystals . Gutman et al performed the reduction with magnesium powder via the solid‐state reaction at 500‐640°C and found that an intriguing structure is generated .…”

“…The structure is composed of Mg 2 Si‐rich and MgO‐rich phases with a few micrometers in thickness and periodically arranged parallel to the surface of the silica glass or quartz crystal. Models and mechanisms for forming such periodic structures have been investigated . In these reactions, however, the formation of silicon has not been clearly reported, while a noticeable fact that the nearest neighbor of the unreacted SiO 2 substrates is always the MgO‐rich phase has been described .…”

“…Models and mechanisms for forming such periodic structures have been investigated . In these reactions, however, the formation of silicon has not been clearly reported, while a noticeable fact that the nearest neighbor of the unreacted SiO 2 substrates is always the MgO‐rich phase has been described . After the pioneering works, the magnesiothermic reduction of soda‐lime silicate and silica glass substrates with magnesium deposited on the substrates was reported, in which Raman spectra showed that nanocrystalline silicon was successfully prepared .…”