In-situ thermal evolution of Ni/Ti multilayer thin films

Cavaleiro, A.; Santos, Rita; Ramos, Adriana; Vieira, M.T.

doi:10.1016/j.intermet.2014.02.019

Cited by 30 publications

(22 citation statements)

References 21 publications

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“…The phase composition after the heating cycle is the same for the Ni/Ti multilayer thin films with different L. However, it should be noted that the reaction temperature depend on L. For multilayer thin films with L of 12 and 4 nm, the reaction temperature is 350 and 385 C, respectively. This result was already observed during hot XRD experiments carried out with a laboratory x-ray source (Co radiation) for multilayer thin films grown on stainless steel [10]. However, in that study the presence of the NiTi 2 phase was not detected [10].…”

Section: In-situ Annealed Filmssupporting

confidence: 52%

“…This result was already observed during hot XRD experiments carried out with a laboratory x-ray source (Co radiation) for multilayer thin films grown on stainless steel [10]. However, in that study the presence of the NiTi 2 phase was not detected [10]. Using the Arrhenius plot of diffusivity, R. Gupta et al [18] calculated the activation energy for Ni/Ti multilayers with different bilayer periodicity.…”

Section: In-situ Annealed Filmsmentioning

confidence: 65%

“…According to a previous paper [10], magnetron sputtered Ni/Ti multilayer thin films exhibit a tendency for amorphization as the modulation period (L) decreases. For the smaller periods, amorphization seems to occur during the deposition process, while in Ni/Ti multilayers with higher L an intermediate disordered state is observed during annealing as ascertained by hot stage x-ray diffraction (XRD).…”

Section: Introductionmentioning

confidence: 79%

“…The incident xray beam was monochromatized to 11.5 keV (l ¼ 0.1078 nm). Taking into account previous in-situ XRD experiments the thermal cycle was defined as follows: temperature increase from 50 to 600 C with steps of 25 C [10]. Isothermal qe2q scans (20 < 2q < 35 ) were acquired at each temperature step.…”

Section: Characterisation Techniquesmentioning

confidence: 99%

“…For the smaller periods, amorphization seems to occur during the deposition process, while in Ni/Ti multilayers with higher L an intermediate disordered state is observed during annealing as ascertained by hot stage x-ray diffraction (XRD). By increasing the temperature, crystallization occurs with the formation of the B2eNiTi austenitic phase [10]. Although with a rather low reaction enthalpy, the Ni/Ti films show potential to be used for joining purposes.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Phase transformations in Ni/Ti multilayers investigated by synchrotron radiation-based x-ray diffraction

Cavaleiro

Ramos

Martins

et al. 2015

Journal of Alloys and Compounds

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Section: In-situ Annealed Filmssupporting

confidence: 52%

Section: In-situ Annealed Filmsmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 79%

Section: Characterisation Techniquesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Phase transformations in Ni/Ti multilayers investigated by synchrotron radiation-based x-ray diffraction

Cavaleiro

Ramos

Martins

et al. 2015

Journal of Alloys and Compounds

Self Cite

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Influence of Oxide Formation Following Ultrashort Pulsed Laser Micromachining on Self‐Propagating Reactions in Free‐Standing Ni/Al Reactive Multilayer Foils

Martins,

Schäfer,

Mücklich

et al. 2024

Adv Eng Mater

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Reactive metallic multilayers, renowned for their exothermic self‐propagating reactions, show a distinct ability to achieve minimal thermal influence in processes such as welding and soldering, where minimizing the thermal impact on the material being joined is crucial. Ultrashort pulsed lasers offer precision micromachining with negligible thermal damage, making them ideal for processing such sensitive materials. However, the formation and redeposition of oxide phases is a commonly observed side‐effect, especially when structuring in ambient air. This study investigates the effects of oxide formed after femtosecond laser treatment on self‐propagating properties, including propagation velocity and microstructure of Ni/Al reactive multilayer foils. Samples with varied line spacings between laser‐cut trenches are created. Scanning electron microscopy, high‐speed camera videography, and image analysis are employed to analyze the microstructure and quantify velocities. Thermal simulations enhanced the understanding of the oxide’s role in self‐propagating dynamics. The findings suggest that even a small oxide layer significantly decelerates the self‐propagating reaction. The oxide functions as a thermal ballast by absorbing the thermal energy generated during the reaction, without actively participating in the reaction mechanism.This article is protected by copyright. All rights reserved.

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Temperature and Thickness Dependent Mechanical Properties of Ti/Ni Multilayer Thin Films

Yang

Wang

2016

Micro and Nanomechanics, Volume 5

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In-situ thermal evolution of Ni/Ti multilayer thin films

Cited by 30 publications

References 21 publications

Phase transformations in Ni/Ti multilayers investigated by synchrotron radiation-based x-ray diffraction

Phase transformations in Ni/Ti multilayers investigated by synchrotron radiation-based x-ray diffraction

Influence of Oxide Formation Following Ultrashort Pulsed Laser Micromachining on Self‐Propagating Reactions in Free‐Standing Ni/Al Reactive Multilayer Foils

Temperature and Thickness Dependent Mechanical Properties of Ti/Ni Multilayer Thin Films

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