Attention was drawn to an article which had discussed the benefits of conducting liquid-metal diffusion experiments in space by using the Canadian micro-gravity vibration isolation mount. Here, 2 main problems with this article were identified. On the basis of experimental results, it had been claimed that the diffusion coefficients of Au in Pb, measured on Earth, were much higher than those obtained under micro-gravity conditions. Close examination of the problems encountered during the processing of capillary diffusion couples in space revealed that this claim could not be justified. It was also concluded that there was a linear relationship between the diffusion coefficient and temperature when g-jitter was suppressed. This conclusion was questioned because the methodology used to determine the processing times and temperatures in space did not seem to be scientific.

Remarks Concerning the Validity of the Measured Diffusion Coefficients in Liquid Metal Systems on the Russian MIR Space Station. M.Shirkhanzadeh: Acta Astronautica, 2008, 62[4-5], 338-40