Nitinol: Tubing versus sputtered film - microcleanliness and corrosion behavior.
Nitinol: Tubing versus sputtered film - microcleanliness and corrosion behavior.
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镍钛诺：管材与溅射薄膜 - 微观清洁度和腐蚀行为。
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
E. Quandt
中科院分区：
文献类型：
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作者：
M. Wohlschlögel;R. Lima de Miranda;A. Schüßler;E. Quandt
比较了不同质量的医疗器械级镍钛合金管材(NixTi1-x，x=0.51；外径7 mm，壁厚0.5 mm)与溅射镍钛膜材料(NixTi1-x，x = 0.51，厚度50µm)的腐蚀行为和微观清洁度。测试了电抛光油管半壳样品和原样的溅射薄膜样品。用定量金相分析了夹杂物的尺寸分布，用动电位极化测试研究了在体温下磷酸盐缓冲盐水中的腐蚀行为。对于溅射的薄膜样品，还利用俄歇电子能谱(AES)成分深度剖析对其表面化学成分进行了分析。结果表明，动电位极化测试中的击穿分数与材料中夹杂物的数量和大小有关。对于溅射的NiTiol薄膜材料，一方面在光学显微镜下没有检测到夹杂物，另一方面在动电位极化测试中也没有发现击穿。对于电抛光的镍钛薄膜材料，用俄歇电子能谱分析表明，溅射的镍钛薄膜材料的表面氧化层出现了镍的贫化，氧钛比为∼2：1。©2015 Wiley期刊，Inc.生物材料资源B部分：应用生物材料，104B：1176-1181,2016。
Corrosion behavior and microcleanliness of medical-device grade Nitinol tubing (Nix Ti1- x , x = 0.51; outer diameter 7 mm, wall thickness 0.5 mm), drawn from various ingot qualities, are compared to the characteristics of sputtered Nitinol film material (Nix Ti1- x , x = 0.51; thickness 50 µm). Electropolished tubing half-shell samples are tested versus as-received sputtered film samples. Inclusion size distributions are assessed using quantitative metallography and corrosion behavior is investigated by potentiodynamic polarization testing in phosphate-buffered saline at body temperature. For the sputtered film samples, the surface chemistry is additionally analyzed employing Auger Electron Spectroscopy (AES) composition-depth profiling. Results show that the fraction of breakdowns in the potentiodynamic polarization test correlates with number and size of the inclusions in the material. For the sputtered Nitinol film material no inclusions were detectable by light microscopy on the one hand and no breakdowns were found in the potentiodynamic polarization test on the other hand. As for electropolished Nitinol, the sputtered Nitinol film material reveals Nickel depletion and an Oxygen-to-Titanium intensity ratio of ∼2:1 in the surface oxide layer, as measured by AES. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 104B: 1176-1181, 2016.
影响因子：
3.6
作者：
de Miranda, Rodrigo Lima;Zamponi, Christiane;Quandt, Eckhard
通讯作者：
Quandt, Eckhard