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The impact of La 2 Zr 2 O 7 ͑LZO͒ on interfacial resistance ͑R p ͒ at the La 0.78 Sr 0.20 MnO 3−␦ /yttria-stabilized zirconia interface was studied upon isothermal sintering at 1200°C for 2-25 h. Quantification of triple phase boundary length was performed by applying focused ion beam/scanning electron microscopy ͑FIB/SEM͒ serial-sectioning techniques and classical stereology. Electrochemical impedance spectroscopy was used to characterize the R p . The effect of LZO formation on microstructural models for R p was analyzed with respect to previous works that did not include this effect. LZO formation modifies the TPB length, rapidly increases R p , and needs to be controlled in analytical microstructural R p models.

No abstract

Extended abstract of a paper presented at Microscopy and Microanalysis 2008 in Albuquerque, New Mexico, USA, August 3 – August 7, 2008

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