Effect of inclusions on cratering behavior in TiNi shape memory alloys irradiated with a low-energy, high-current electron beam

Meisner, L. L.; Markov, A. B.; Proskurovsky, D.I.; Ротштейн, В. П.; Ozur, G. E.; Meisner, S. N.; Yakovlev, E. V.; Poletika, T. M.; Girsova, S. L.; Semin, V.O.

doi:10.1016/j.surfcoat.2016.06.036

Cited by 49 publications

(11 citation statements)

References 52 publications

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“…Its chemical composition was as follows (wt%): 55.08 Ti, 0.051 Ni, 0.03 C, 0.002 O; and the transformation temperature As = 303 K. The methods for preparing TiNi substrates as well as their microstructural characterization are given in [13]. To prevent the local delamination of a Ti-Ta film due to cratering during the pulsed melting [13], the substrate was preirradiated with LEHCEB in the following mode: pulse duration of 2−2.5 μs, maximum electron energy of 25 keV, energy density Es = 3.8±0.7 J/cm 2 ; beam diameter of ~60 mm, number of pulses n = 32, and repetition rate of 1 pulse/5 s. After this pre-treatment, TiNi substrate was installed by manipulator alternately along the magnetron unit axis for сo-deposition of 50-nm-thick Ti70Ta30 film, and along the LEHCEB axis for pulsed melting of film/substrate system. Pulsed melting was performed in the following mode: maximum electron energy of 15 keV, Es = 2±0.2 J/cm 2 ; n = 5.…”

Section: Methodsmentioning

confidence: 99%

Formation of Ti-Ta-based surface alloy on TiNi SMA substrate from thin films by pulsed electron-beam melting

Meisner

Markov

Ozur

et al. 2017

J. Phys.: Conf. Ser.

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Abstract. TiNi shape memory alloys (SMAs) are unique metallic biomaterials due to combination of superelastisity and high corrosion resistance. Important factors limiting biomedical applications of TiNi SMAs are a danger of toxic Ni release into the adjacent tissues, as well as insufficient level of X-ray visibility. In this paper, the method for fabrication of protective Ni-free surface alloy of thickness ~1 μm of near Ti70Ta30 composition on TiNi SMA substrate has been successfully realized. The method is based on multiple alternation of magnetron co-deposition of Ti70Ta30 thin (50 nm) films and their liquid-phase mixing with the TiNi substrate by microsecond low-energy, high current electron beam (≤15 keV, ~2 J/cm 2 ) using setup RITM-SP (Microsplav, Russia). It was found by AES, XRD, SEM/EDS and HRTEM/EDS examinations, that Ti-Ta surface alloy has an increased X-ray visibility and gradient multiphase amorphous-nanocrystalline structure containing nanopores.

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Section: Methodsmentioning

confidence: 99%

Formation of Ti-Ta-based surface alloy on TiNi SMA substrate from thin films by pulsed electron-beam melting

Meisner

Markov

Ozur

et al. 2017

J. Phys.: Conf. Ser.

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“…Кроме того, видно, что градиент температуры вдоль облучаемой поверхности для SS 316L/MnS превышает более чем в 20 раз значение градиента для образца NiTi/NiTi 2 . Наличие градиентов температуры приводит к термокапиллярной конвекции, что, в свою очередь, является наиболее вероятной причиной возникновения кратеров на поверхности материалов [4][5][6][7]. Из литературы известно, что в результате облучения на поверхности образца из нержавеющей стали 316L доля образующихся кратеров составляет 0.25, это означает, что четыре включения дают один кра-тер [2].…”

Section: да шепель аб марковunclassified

Распределение Температуры В Образце С Микроскопическим Включением Второй Фазы При Облучении Низкоэнергетическим Импульсным Сильноточным Электронным Пучком

Шепель¹,

Марков²

2017

Письма В Журнал Технической Физики

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С помощью методов численного моделирования рассчитано температурное поле, возникающее в поверхностном слое мишени из никелида титана, содержащей включения интерметаллида NiTi2, облучаемой низкоэнергетическим сильноточным электронным пучком микросекундной длительности. Полученное температурное поле сравнивалось с температурным полем, рассчитанным ранее для мишени из нержавеющей стали 316L, содержащей включение из сульфида марганца (MnS). Обнаружено, что, как и в случае с нержавеющей сталью, в области расположения включения существует перегрев. Однако величина перегрева в случае никелида титана (12 K) существенно ниже, чем в случае нержавеющей стали 316L (283 K). Также существенно отличается динамика плавления двух систем. DOI: 10.21883/PJTF.2017.03.44221.16301

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“…Ti6Al4V alloy plays an important role for orthopaedic applications [21][22][23][24][25]. Nickel-titanium alloy (Nitinol, shape memory alloy) has been used in the treatment of cardiovascular implants [26][27][28][29][30]. The combination of the high corrosion resistance, the tensile strength, the flexibility, and the biocompatibility, is the reason of widespread and successful application of titianium and its alloys in modern implantology [31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

1D Titania Nanoarchitecture as Bioactive and Photoactive Coatings for Modern Implants: A Review

Radtke¹

2017

Application of Titanium Dioxide

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The research efforts in understanding the influence of TiO 2 1D nanoarchitecture structure and morphology on its biological and photocatalytic activity absorbed a lot of attention during last few years. Nowadays, the application of TiO 2 coatings in biomedical technologies (e.g., in modern implantology) requires the material of strictly defined structure and morphology, possessing both high biocompatibility, as well as antimicrobial properties. The presented review is a compilation of interdisciplinary knowledge about the application of 1D TiO 2 nanostructural coatings (nanotubes, nanofibres, nanowires) in biomedical technologies. The methods and parameters of their synthesis, and the physicochemical techniques used in the characterization of their structure and morphology, are discussed. Moreover, their ability to be applied as innovative coatings for modern implants is presented.

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Effect of inclusions on cratering behavior in TiNi shape memory alloys irradiated with a low-energy, high-current electron beam

Cited by 49 publications

References 52 publications

Formation of Ti-Ta-based surface alloy on TiNi SMA substrate from thin films by pulsed electron-beam melting

Formation of Ti-Ta-based surface alloy on TiNi SMA substrate from thin films by pulsed electron-beam melting

Распределение Температуры В Образце С Микроскопическим Включением Второй Фазы При Облучении Низкоэнергетическим Импульсным Сильноточным Электронным Пучком

1D Titania Nanoarchitecture as Bioactive and Photoactive Coatings for Modern Implants: A Review

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