Influence of depth resolution on interdiffusion measurements in polycrystalline Cu/Pd multilayers

Bukaluk, A.

doi:10.1002/1096-9918(200008)30:1<597::aid-sia827>3.0.co;2-k

Cited by 5 publications

(2 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Various work on this topic [45][46][47][48][49][50] has shown that significant interdiffusion can occur in Pd-Cu thin films fabricated using deposition techniques such as electrodeposition, thermal evaporation and magnetron sputtering. Bukaluk [50] reports interdiffusion between Pd/Cu multilayers occurring at temperatures as low as 120 °C.…”

Section: Eqmentioning

confidence: 92%

Effects of thin film Pd deposition on the hydrogen permeability of Pd 60 Cu 40 wt% alloy membranes

Al-Mufachi

Nayebossadri

Speight

et al. 2015

Journal of Membrane Science

View full text Add to dashboard Cite

Effects of thin film Pd deposition on the Hydrogen permeability of Pd 60 Cu 40 wt% alloy membranes, Journal of Membrane Science, http://dx. AbstractPd 60 Cu 40 wt% (Pd 47.3 Cu 52.7 at%) membranes were surface modified by depositing Pd thin films of three different thicknesses (~100, 800 and 1,400 nm) on to one side of a range of as-received Pd 60 Cu 40 wt% cold-rolled foils via magnetron sputtering. The hydrogen permeability of the membranes was then measured and compared to uncoated material. The Pd 60 Cu 40 wt% membrane coated with a 1,400 nm thick Pd thin film positioned on the feed side (445 kPa of hydrogen pressure) during hydrogen permeability measurements and cycled between 50 and 450 °C achieved the highest hydrogen permeability of 1.09  10 -8 mol m -1 s -1 Pa -0.5 at 450 °C in the third cycle. This is a 58% increase on the value measured for the as-received Pd 60 Cu 40 wt% under the same conditions. This improvement can be attributed to a Pd-rich Pd-Cu face centred cubic (FCC) phase forming through interdiffusion between the Pd thin film and bulk Pd-Cu membrane as a result of the test conditions used during hydrogen permeability measurements. This introduces a larger concentration gradient across the membrane due to the relatively high hydrogen solubility of the Pd-rich Pd-Cu FCC phase resulting in the observed increase in permeability.The Pd 60 Cu 40 wt% membranes coated with a ~1,400 nm and ~800 nm thick Pd thin film retained an almost pure Pd surface throughout cycling between 50 and 450 °C with a feed and permeate hydrogen pressure of 445 and 100 kPa, respectively. This is possibly due to the clamping effect of the Pd-Cu membrane substrate applied on the Pd thin film which would prevent embrittlement caused by cycling across the critical temperature of 295 °C. 2

show abstract