In situ transmission electron microscopy studies of the kinetics of Pt-Mo alloy diffusion in ZrB2 thin films
2013 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 103, no 12Article in journal (Refereed) Published
Using in situ high-temperature (1073–1173 K) transmission electron microscopy, we investigated the thermal stability of Pt and Mo in contact with polycrystalline ZrB2 thin films deposited on Al 2O3(0001). During annealing, we observed the diffusion of cubic-structured Pt1− x Mo x (with x = 0.2 ± 0.1) along the length of the ZrB2 layer. From the time-dependent increase in diffusion lengths, we determined that the Pt1− x Mo x does not react with ZrB2, but diffuses along the surface with a constant temperature-dependent velocity. We identify the rate-limiting step controlling the observed phenomenon as the flux of Mo atoms with an associated activation barrier of 3.8 ± 0.5 eV.
Place, publisher, year, edition, pages
American Institute of Physics (AIP) , 2013. Vol. 103, no 12
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-100316DOI: 10.1063/1.4820581ISI: 000324826000015OAI: oai:DiVA.org:liu-100316DiVA: diva2:661479
Funding Agencies|AFOSR|FA9550-10-1-0496|STINT||Swedish Foundation for International Cooperation in Research and Higher Education||Swedish Research Council||Austrian Science Fund FWF||START Project|Y371|Knut and Alice Wallenberg Foundation for the Ultra Electron Microscopy Laboratory in Linkoping||2013-11-042013-11-042016-08-31