Open AccessFunctional properties of NiTi nanofilm/Kapton composite
Author(s) -
A. Sibirev,
Matvei Alchibaev,
I. A. Palani,
S. Arul Jayachandran,
Anshu Sahu,
Sergey Belyaev,
Natalia Resnina
Publication year - 2022
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1213/1/012001
Subject(s) - kapton , materials science , nickel titanium , shape memory alloy , composite material , layer (electronics) , amorphous solid , composite number , vacuum chamber , martensite , deposition (geology) , metallurgy , microstructure , polyimide , crystallography , chemistry , paleontology , sediment , biology
The aim of the paper was to study the one-way and two-way shape memory effects in the NiTi nanofilm/Kapton composite. 500 nm film of the Ni 50 Ti 50 alloy was deposited to Kapton by flash evaporation. After deposition, the NiTi layer was amorphous and the sample was held at a temperature of 350 - 400 °C for two hours in vacuum to crystallize the NiTi layer. As deposited sample as well as samples after heat treatment were bent around the mandrel with various diameters at room temperature and subjected to heating – cooling – heating through a temperature range of the martensitic transformations. It was shown that as-deposited sample did not demonstrate the recoverable stain variation. At the same time, the heat treated sample demonstrated the one-way shape memory effect on heating and a maximum recoverable strain was found to be 2 %. The two-way shape memory effect was not observed on further cooling and heating.