Phase Transitions and Electrochemical Corrosion Behaviors of Ti50Ni50-xCux Shape Memory Alloys for Metallic Biomaterials

• Autorzy: Lee Kwangmin , Rho Sanghyun

Identyfikatory

DOI

10.24425/amm.2020.133689

• Języki publikacji: EN

Abstrakty

EN

TiNi alloys have excellent shape memory properties and corrosion resistance as well as high biocompatibility. This study investigated the effects of copper addition on the phase transitions and electrochemical corrosion behaviors of Ti₅₀Ni_50-xCu_x alloys. TiNi, Ti₅₀Ni₄₇Cu₃, Ti₅₀Ni₄₄Cu₆, and Ti₅₀Ni₄₁Cu₉ alloys were prepared using vacuum arc remelting followed by 4 h homogenization at 950°C. Differential scanning calorimetry and X-ray diffraction analyses were conducted. The corrosion behaviors of the alloys were evaluated using potentiodynamic polarization test in Hank’s balanced salt solution at a temperature of 36.5 ± 1°C. The TiNi alloy showed phase transitions from the cubic B2 phase to the monoclinic B19’ phase when the alloy was thermally cycled. The addition of copper to the TiNi alloy played a major role in stabilizing the orthorhombic B19 phases during the phase transitions of Ti₅₀Ni_50-xCu_x alloys. The shifts in the corrosion potential toward the positive zone and the low corrosion current density were affected by the amount of Cu added. The corrosion resistance of the TiNi alloy increased with increasing copper content.

Słowa kluczowe

EN

Ti50Ni50-xCux; phase transition; electrochemical corrosion behavior; DSC; PDP

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2020
• Tom: Vol. 65, iss. 4
• Strony: 1303--1306
• Opis fizyczny: Bibliogr. 12 poz., rys., tab.

Twórcy

autor

Lee Kwangmin

• Honnam National University, School of Materials Science & Engineering, Gwangju, Republic of Korea

autor

Rho Sanghyun

• LG Hausys R&D Center, LG Hausys, Seoul 07796, Republic of Korea

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).