Influence of carbon support microstructure on the polarization behavior of a polymer electrolyte membrane fuel cell membrane electrode assemblies
Guha, A; Zawodzinski, TA, Jr; Schiraldi, DA
| HERO ID | 2616173 |
|---|---|
| In Press | No |
| Year | 2010 |
| Title | Influence of carbon support microstructure on the polarization behavior of a polymer electrolyte membrane fuel cell membrane electrode assemblies |
| Authors | Guha, A; Zawodzinski, TA, Jr; Schiraldi, DA |
| Journal | Journal of Power Sources |
| Volume | 195 |
| Issue | 16 |
| Page Numbers | 5167-5175 |
| Abstract | The influence of Cr3C2 and VC addition on the microstructure and mechanical properties of WC-Mg composites hot-pressed at 1650 degrees C for 90 min was comprehensively investigated. The grain growth of WC was significantly retarded and the homogeneity of MgO particulate dispersion was effectively improved with the addition of 0.5 wt.% Cr3C2 or 0.5 wt.% VC. The indentation size effect (ISE) on hardness was restrained and the load-independent hardness was increased by doping grain growth inhibitors. Improvements on fracture toughness of hot-pressed samples were also observed due to the refined WC grains and uniformly dispersed MgO particulates. In addition, experimental results demonstrated that Niihara's equation was preferable for estimating the indentation fracture toughness, by comparing the fracture toughness evaluated using the single-edge V-notch beam (SEVNB) method with the values estimated through the Vickers indentation technique. (C) 2013 Elsevier Ltd. All rights reserved. |
| Doi | 10.1016/j.jpowsour.2010.03.006 |
| Wosid | WOS:000277868600002 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | Carbon nanofibers; Vulcan XC-72 carbon; Catalyst support; Support morphology; Membrane electrode assembly |