TEM phase analysis of NiTi shape memory alloy prepared by self-propagating high-temperature synthesis

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F17%3A00337250" target="_blank" >RIV/68407700:21340/17:00337250 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/17:00470162 RIV/61389005:_____/17:00470162
Result on the web
<a href="https://doi.org/10.1080/2374068X.2016.1247338" target="_blank" >https://doi.org/10.1080/2374068X.2016.1247338</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1080/2374068X.2016.1247338" target="_blank" >10.1080/2374068X.2016.1247338</a>

Result language
angličtina
Original language name
TEM phase analysis of NiTi shape memory alloy prepared by self-propagating high-temperature synthesis
Original language description
The effect of annealing a Ni–48at.%Ti alloy prepared by selfpropagation high-temperature synthesis (SHS) by means of transmission electron microscopy (TEM) was studied. The alloy in the as-sintered condition shows the presence of B2 NiTi matrix, relatively large particles (2–100 μm) of cubic NiTi2 phase and very fine densely distributed particles of rhombohedral Ni4Ti3 phase. The phase fractions were determined by the Rietveld refinement of neutron diffraction. Twelve-hour annealing at 1000 °C leads to coarsening of Ni4Ti3 particles. Slow furnace cooling from the annealing temperature results in a transformation of the rhombohedral Ni4Ti3 phase to a metastable Ni3Ti2 phase with cubic symmetry. Its particles, coherent with the B2 matrix, have the form of thin oval platelets with lenticular cross-section. The orientation relation is either cube-to-cube or [115]B2 || [111]P and (552)B2 || (121)P. An additional isothermal annealing of the water cooled samples at 720 °C for 3 and 10 h was carried out. According to the scanning and transmission electron microscopy observation of the sample annealed for 3 h, the cubic Ni3Ti2 phase transforms to the high-temperature tetragonal Ni3Ti2–H variant (space group I4/mmm).
Czech name
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Czech description
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Type
J<sub>SC</sub> - Article in a specialist periodical, which is included in the SCOPUS database
CEP classification
—
OECD FORD branch
20501 - Materials engineering

Project
<a href="/en/project/GA14-03044S" target="_blank" >GA14-03044S: Preparation of NiTi shape memory alloys by reactive sintering</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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