• Title/Summary/Keyword: air oxidation

Search Result 951, Processing Time 0.036 seconds

Effect of Alloy Addition (Ta, Nb) on Oxidation Behavior of cp-Ti for Biomaterials (생체용 Ti합금의 산화거동에 미치는 Ta 및 Nb 첨가의 영향)

  • Lee Doh-Jae;Oh Tae-Wook;Park Bum-Su;Kim Soo-Hak;Jun Choong-Geug;Yoon Kye-Lim
    • Korean Journal of Materials Research
    • /
    • v.14 no.3
    • /
    • pp.211-217
    • /
    • 2004

  • The oxidation behaviors of Ti-10Ta-10Nb alloy and Ti-6Al-4V alloy were studied in dry air atmosphere. Specimens were melted in consumable vacuum arc furnace and homogenized at $1050^{\circ}C$ for 24 h. Hot rolling was performed at $1000^{\circ}C$. Specimens of the alloys were oxidized as the temperature range $400~650^{\circ}C$ for 30 min. The oxidation behavior of the alloys was analysed by optical microscope, SEM/EDX, XRD, XPS and TGA. Immersion test was performed in 1% Lactic acid. In the microscope observation, oxide layer of Ti-10Ta-10Nb alloy was denser and thinner than Ti-6Al-4V's. The weight gains during the oxidation rapidly increased at the temperature above $600^{\circ}C$ in Ti-6Al-4V's alloy and$ 700^{\circ}C$ in Ti-10Ta-10Nb alloy. According to XRD results, oxide layers were composed of mostly $TiO_2$(rutile) phase. It was analysed that the passive film of the Ti alloys consisted of $TiO_2$ through X-ray photoelectron spectroscopy(XPS) analysis.

  • https://doi.org/10.3740/MRSK.2004.14.3.211 인용 PDF KSCI