Comparison of corrosion behavior of Ti 3 SiC 2 and Ti 3 AlC 2 in NaCl solutions with Ti
Source abstract
Abstract
Abstract Corrosion behavior of self-sintered, ternary-layered titanium silicon carbide (Ti 3 SiC 2 ) and titanium aluminum carbide (Ti 3 AlC 2 ) fabricated by an in-situ solid-liquid reaction/hot pressing process was investigated by potentiodynamic polarization, potentiostatic polarization and electrochemical impedance spectroscopy in a 3.5% NaCl solution. Commercially pure titanium (Ti) was selected for comparison through XRD, XPS, SEM and EDS examinations for elucidating both the passivation behavior and corrosion mechanism of the alloys. Both Ti 3 SiC 2 and Ti 3 AlC 2 exhibited significantly superior passivation characteristics compared to Ti; Ti 3 SiC 2 also showed better corrosion resistance. The silicon/aluminum site is prone to attack, and the difference in the diffusion rate between the A-site atoms and titanium decreases the passivation ability of the MAX phase. CP titanium exhibited a lower passivation current density and did not undergo breakdown in the test potential region while two MAX phases are destroyed. Nevertheless, the corrosion resistances of Ti 3 SiC 2 and Ti 3 AlC 2 are comparable to that of CP titanium.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: MXene and MAX Phase Materials · Aluminum Alloys Composites Properties · Advanced ceramic materials synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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