Microscratch Analysis and Interfacial Toughness of Catalyst Coating on Electrolyte Polymer in Micro Fuel Cells
This study combined microscratch test and fracture-mechanical analysis to assess the interfacial reliability of Nafion and Pt/Ru catalyst layers in micro fuel cells. Scratch test was used to determine the critical load for interfacial failure, while fracture-mechanical analysis was used to quantify the adhesion between Nafion (the electrolyte polymer substrate) and Pt/Ru alloy (catalyst coating). We also proposed a key of solving ambiguous problems in indentation cracking test by determining geometric information from crack propagation and critical points, as for a hard porous coating on a soft substrate. A comparative analysis of three coating methods, spray, decalcomania and their mixed process, was done to assess the validity of our new method.
Byung Tae Ahn, Hyeongtag Jeon, Bo Young Hur, Kibae Kim and Jong Wan Park
G. J. Lee et al., "Microscratch Analysis and Interfacial Toughness of Catalyst Coating on Electrolyte Polymer in Micro Fuel Cells", Solid State Phenomena, Vols. 124-126, pp. 1633-1636, 2007