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XRD and TEM Heating of Large Period Ni/Al Multilayer Coatings

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Świątek Z., Gradys A., Maj Ł., Morgiel J., Marszałek K., Mania R., Szlezynger M.
Acta Physica Polonica A
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2016
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vol. 130
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issue 4
880-883
EN
The Ni/Al multilayer coating of λ ≈100 nm was deposited onto (001)-oriented monocrystalline silicon substrate using double target magnetron sputtering system equipped with rotating sample holder. The thicknesses of alternating layers were adjusted in the way to preserve the chemical composition ratio close to 50%Al:50%Ni (at.%). The in situ X-ray diffraction and in situ transmission electron microscopy heating experiments were carried out at relatively low heating rates (20°C/min) in order to study the phase transformation sequence. The investigations revealed that the reaction between Ni and Al multilayers starts at ≈200°C with precipitation of Al₃Ni phase, while above 300°C dominates precipitation of Ni₃Al and NiAl intermetallic phases. Both the X-ray and electron diffractions acquired at 450°C confirmed presence of the Ni₃Al and NiAl intermetallics, but the former pointed at still lasting traces of Ni(Al) solid solution.
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Influence of process-material conditions on the structure and biological properties of electrospun polyvinylidene fluoride fibers

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Zaszczyńska A., Sajkiewicz P. Ł., Gradys A., Tymkiewicz R., Urbanek O., Kołbuk D., Zaszczyńska A., Sajkiewicz P. Ł., Gradys A., Tymkiewicz R., Urbanek O., Kołbuk D.
Bulletin of the Polish Academy of Sciences: Technical Sciences
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2020
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issue 3
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