Kinetics of Nitridation of Magnesium and Aluminum

Abstract

The kinetics of nitridation of magnesium and aluminum has been studied as a function of time, temperature, pressure and surface preparation. A manometric apparatus was employed for all of the measurements. Nitridation of magnesium is quite appreciable at 415°and higher where the rate is found to follow a linear rate law closely. The relatively high vapor pressure of magnesium in the temperature range studied interferes with the measurements, and sets a high temperature

Fermi Level Depinning Failure for Al/GeO2/Ge Contacts

“…3 demonstrate that the 1 nm thick GeO x N y layer can effectively block Al in-diffusion, minimizing the MIGS caused by the electron wave function of Al penetrating into the Ge bandgap. Actually, Al will not react with nitrogen below 475 • C. 27 Nitrogen atoms in the top surface region of the GeO x N y layer may form a diffusion barrier to avoid the direct contact between Al and oxygen atoms within the GeO x N y layer. Thus, the integrity of GeO x N y layer will be kept and the oxygen and nitrogen atoms within the GeO x N y layer can still effectively passivate the Ge surface, realizing FL depinning and resulting in an ohmic Al/GeO x N y /n-Ge contact.…”

Aluminum powder metallurgy processing

“…The dominant physical barrier to nitridation was oxidation [18], both from a 31 thermodynamic argument, i.e., the nitrogen and oxygen Ellingham diagrams [64,65], and from kinetic evidence [66].…”

High-temperature ion-molecule chemistry. A kinetic study of gas-phase reactions of magnesium atoms with D3+, methanium, ammonium, and tert-C4H9+ ions

“…23 and later by Smith and Futrell.24 Sefcik et al proposed that the observed chemical equivalency of the hydrons in the presumed Cs structure of the methanium ion was due to internal rearrangement of the ion via a C2V intermediate 25. This barrier for rearrangement has been calculated to be about6 kcal/ Po, Porter / High-Temperature Ion-Molecule Chemistry i v i d u a l n o t d i r e c t l y a s s o c i a t e d w i t h s c i t e i s p r o h i b i t e d .…”