مشخصات پژوهش

عنوان	A comparison of electrochemical behavior of coated nanostructured Ta on Ti substrate with pure uncoated Ta in Ringer's physiological solution
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	pure Ta; magnetron sputtering technique; nanostructured; Mott–Schottky analysis; Ringer's physiological solution.
چکیده	In the current investigation, direct current magnetron sputtering (DCMS) provided nanostructured (NS) α-Ta coating on pure Ti substrate as an effective coating technique. Microstructural observations revealed that a dense and homogeneous coating exhibiting (110) preferred orientation could be achieved. Different electrochemical experiments were performed to study the electrochemical and passive behaviors of α-Ta coating and uncoated commercially pure Ta in the Ringer’s physiological electrolyte at 37 °C. Interestingly, the electrochemical response and semiconducting behavior of α-Ta coating and pure Ta were different in several aspects. α-Ta coating showed a superior passive behavior and higher level of protection in Ringer’s physiological electrolyte at 37 °C compared to pure Ta. Mott–Schottky (M–S) analysis clearly showed that a less defective passive film forms on α-Ta coating due to its lower levels of donor densities compared to what could be estimated for the case of pure Ta. α-Ta coating offered a considerably improved corrosion resistance in the aforementioned physiological environment, owing to its nano-scale features that have facilitated the formation of less defective and thicker protective passive films.
پژوهشگران	آرش فتاح الحسینی (نفر اول)، حسن علم خواه (نفر دوم)، غزاله انصاری (نفر سوم)، فرید رضا عطارزاده (نفر چهارم)، امید ایمان طلب (نفر پنجم)