کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5437583 1398175 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparison of corrosion behavior of Ti3SiC2 and Ti3AlC2 in NaCl solutions with Ti
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Comparison of corrosion behavior of Ti3SiC2 and Ti3AlC2 in NaCl solutions with Ti
چکیده انگلیسی
Corrosion behavior of self-sintered, ternary-layered titanium silicon carbide (Ti3SiC2) and titanium aluminum carbide (Ti3AlC2) 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 Ti3SiC2 and Ti3AlC2 exhibited significantly superior passivation characteristics compared to Ti; Ti3SiC2 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 Ti3SiC2 and Ti3AlC2 are comparable to that of CP titanium.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 7, May 2017, Pages 5708-5714
نویسندگان
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