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RESEARCH PRODUCT
ChemInform Abstract: Electrical and Mechanical Breakdown of Anodic Films on Tungsten in Aqueous Electrolytes.
Carmelo SunseriF. Di QuartoSalvatore Piazzasubject
chemistryElectrical resistivity and conductivityAnodizingIonizationElectrical breakdownOxygen evolutionchemistry.chemical_elementGeneral MedicineElectrolyteComposite materialTungstenAnodedescription
Abstract Different types of breakdown are reported to occur during the galvanostatic growth of WO3 films in different aqueous electrolytes. Stresses inside the growing film cause the occurrence of cracks at a critical thickness which varies with the anodizing solution. The electrical breakdown is caused by avalanche ionization of the electronic current inside the film. The influence of the different experimental parameters on both the mechanical and the electrical breakdown voltages is discussed. For the electrical breakdown a model is proposed which explains the dependence of the sparking voltage on the electrolyte resistivity by assuming a double layer effect on the oxygen evolution reaction.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1988-09-13 | ChemInform |