Effect of H2 flow rate on electrical conductivity of APS TiO2 coatings
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Abstract
TiO2 coatings were produced by atmospheric plasma spraying system.H2 flow rate was adjusted to investigate its effect on the microstructure, phase and electrical conductivity of TiO2 coatings.The results show that TiO2 coating is mainly composed of rutile, anatase and deoxidization phases Magneli(TinO2n-1, n=4-10), and the contents of them depend on H2 flow rate.With the increasing of H2 flow rate, porosity decreases, deoxidization phase Magneli and the electrical conductivity of coatings increase.The electrical conductivity of TiO2 coatings also increases with temperature.
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