Ion assisted growth of B4C diffusion barrier layers in Mo/Si multilayered structures
We investigated the thermal stability of e-beam deposited Mo/B 4C/Si/B 4C layered systems, with and without ion assistance during the growth of the B 4C diffusion barrier layers. The thermal stability was investigated by in situ thermal annealing during grazing incidence X-ray reflection. By studying partially treated B 4C barrier layers, we found that the improvement in thermal stability is caused by an enhanced density of the B 4C layer. © 2012 American Institute of Physics.
Abstract : Methane-Air mixture in Argon heat bath is ignited by shock, reflected from the endwall of shock tube. Experiments are compared with numerical prediction based on Bowman's reaction scheme including Zel'dovich mechanism. Agreement between experimental density profiles and numerical prediction is very good. Methane absorption outside the boundary layer agrees well with computation based on isobaric combustion. Measurements in the boundary layer, albeit with insufficient space resolution, are in accord with the predicted trends.