نوع مقاله : مقاله پژوهشی
عنوان مقاله English
نویسندگان English
In this research, the microstructure, distribution of elements and constituent phases, of SPSed Ti-10Mo alloy were evaluated and their effect on its corrosion resistance were investigated. To prepare Ti-10Mo alloy by spark plasma sintering, 90 wt.% of powder titanium was mixed with 10 wt.% of molybdenum powder in a ball mill for 10 hours. The ratio of ball to powder were 1:10. The powder mixture were sintered at 1250˚C at pressure of 50 MPa for 6 min in a vacuum of 0.1 Pa. In the microstructure β phase and α/β structure, in which acicular α phase have grown in the grain boundaries, are seen. Analysis of open circuit potential indicated that a passive film formed spontaneously on the alloy, and due the wide passive region that can be seen on the polarization curve, would another evidence to formation of the passive film. The EIS results also confirm that the passive oxide film formed on the alloy is a bi-layer structure consisted of an outer porous layer and an inner barrier layer, in which the inner barrier layer ensures the alloy a good corrosion resistance.
کلیدواژهها English
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