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Local-probe based electrical characterization of a multiphase intermetallic γ-TiAl based alloy

机译：基于局部探针的多相金属间金属间γ-TiAL合金的电学特性

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摘要

The requirements for high performance and low energy consumption call for novel light-weight high-temperature structural materials. A possible answer can be intermetallic γ-TiAl-based alloys, which-in terms of weight-clearly outperform the classical Ni based alloys. However, not only their mechanical properties, such as high specific strength and high creep resistance, are important for device design and use, but also their electrical behavior is of significant importance. In order to correctly interpret the results of electrical material testing techniques, such as eddy current testing, a profound knowledge on the electrical properties is essential. In this study, local-probe techniques, such as conductive atomic force microscopy (CAFM) and micro four-point probe (μ4PP) measurements, were used to determine the specific resistivity of the constituent phases of a Ti-43.5Al-4Nb-lMo-0.1B (at. %) TNM γ-TiAl based alloy. It turned out that the different phases exhibit noticeably different resistivity values, which vary over two orders of magnitude, whereas the β_o phase has the smallest resistivity and the α_2 phase the highest. CAFM and μ4PP results were in rather good agreement for the α_2 and γ phases with resistivity values of ρ_(α2,CAFM) = (l.0±0.7) × 10~(-5)Ωm and ρ_(α2,4pp) = (1.5 + 1.5) × 10~(-5)Ωm for the α_2-phase, and ρ_(γ,cafm) = (6.5 ±2.1) × 10~(-6)Ω m, and ρ_(γ,4PP)= (1.4± 1.2) × 10~(-6)Ωm for the γ-phase. For the β_o phase, μ4PP measurements resulted in ρ_(βo,4PP) = (9.0 ± 5.0) × 10~(-7)Ωm. In this case, CAFM values are not reliable due to the formation of a contact barrier that deteriorates the measurements.
机译：用于高性能和低能量消耗呼叫新型轻质高温结构材料的要求。一种可能的答案可以是金属间基于γ-TiAl基合金，其中，在以下方面重清楚地胜过经典的Ni基合金。然而，不仅其机械性能，如高的比强度和高抗蠕变性，对于设备的设计和使用的重要，而且其电行为是显著的重要性。为了正确地解释的电材料测试技术，如涡流探伤的结果，对电特性渊博的知识是至关重要的。在这项研究中，局部探测技术，诸如导电原子力显微镜（CAFM）和微四点探针（μ4PP）的测量，被用来确定一个Ti- 43.5Al-4NB-LMO的构成相的比电阻-0.1B（原子％）TNMγ-TiAl基合金。原来，在不同阶段表现出显着不同的电阻率值，其变化超过两个数量级，而β_o相具有最小电阻率和相位α_2最高。 CAFM和μ4PP结果均用于与ρ_的电阻率值（α2，CAFM）=（的1.0±0.7）×10α_2和γ相，而良好的一致性〜（-5）和Ωm的ρ_（α2,4pp）=（ 1.5 + 1.5）×10〜（-5）Ωm的用于α_2相和ρ_（γ，CAFM）=（6.5±2.1）×10〜（-6）Ωm和ρ_（γ，4PP）=（ 1.4±1.2）×10〜（-6）Ωm的为γ相。对于β_o相，μ4PP测量导致ρ_（β0，4PP）=（9.0±5.0）×10〜（-7）Ωm的。在这种情况下，CAFM值不旨在该劣化测量的接触阻挡层的形成可靠所致。

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  • 来源
    《Journal of Applied Physics》 |2021年第20期|205107.1-205107.9|共9页
  • 作者

    M. Kratzer; M. Huszar; L. Tengg; T. Billovits; B. Kaufmann; P. Supancic; H.Clemens; S.Mayer; C. Teichert;

  • 作者单位

    Institute of Physics Montanuniversitaet Leoben Franz-Josef-Str. 18 A-8700 Leoben Austria;

    Institute of Physics Montanuniversitaet Leoben Franz-Josef-Str. 18 A-8700 Leoben Austria;

    Department of Materials Science Montanuniversitaet Leoben Franz-Josef-Str. 18 A-8700 Leoben Austria;

    Institute of Structural and Functional Ceramics Montanuniversitaet Leoben Peter-Tunner-Str. 5 A-8700 Leoben Austria;

    Institute of Structural and Functional Ceramics Montanuniversitaet Leoben Peter-Tunner-Str. 5 A-8700 Leoben Austria;

    Institute of Structural and Functional Ceramics Montanuniversitaet Leoben Peter-Tunner-Str. 5 A-8700 Leoben Austria;

    Department of Materials Science Montanuniversitaet Leoben Franz-Josef-Str. 18 A-8700 Leoben Austria;

    Department of Materials Science Montanuniversitaet Leoben Franz-Josef-Str. 18 A-8700 Leoben Austria;

    Institute of Physics Montanuniversitaet Leoben Franz-Josef-Str. 18 A-8700 Leoben Austria;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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