Selective surface oxidation and nitridation of NiTi shape memory alloys by reduction annealing

Lakshman Neelakantan; Srinivasan Swaminathan; Michael Spiegel; Gunther Eggeler; Achim Walter Hassel

doi:10.1016/j.corsci.2008.12.018

Selective surface oxidation and nitridation of NiTi shape memory alloys by reduction annealing

Lakshman Neelakantan, Srinivasan Swaminathan, Michael Spiegel, Gunther Eggeler, Achim Walter Hassel (Editor)

Institute of Chemical Technology of Inorganic Materials

Research output: Contribution to journal › Article › peer-review

Abstract

The current investigation aims in understanding the effect of short-term (300 s) annealing of NiTi shape memory alloys (SMAs) in a reducing atmosphere of N2-10% H2. The influence of temperature on the resulting surface morphology and chemistry is elucidated. On annealing at 600 °C, the surface is covered with a thin layer of titanium oxide, which is 7.5 nm thick, while at 800 °C, the surface is covered with a golden-yellow layer of TiN of thickness more than 100 nm. The surface analysis carried out by XPS on the specimen annealed at 800 °C confirms the formation of TiN and more notably, the surface is devoid of Ni.

Original language	English
Pages (from-to)	635-641
Number of pages	7
Journal	Corrosion Science
Volume	51
Issue number	3
DOIs	https://doi.org/10.1016/j.corsci.2008.12.018
Publication status	Published - Mar 2009

Fields of science

104005 Electrochemistry
104006 Solid state chemistry
104014 Surface chemistry
104017 Physical chemistry
105113 Crystallography
105116 Mineralogy
503013 Subject didactics of natural sciences
204 Chemical Process Engineering
204001 Inorganic chemical technology
205016 Materials testing
210006 Nanotechnology
211104 Metallurgy

JKU Focus areas

Engineering and Natural Sciences (in general)

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10.1016/j.corsci.2008.12.018

Cite this

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title = "Selective surface oxidation and nitridation of NiTi shape memory alloys by reduction annealing",

abstract = "The current investigation aims in understanding the effect of short-term (300 s) annealing of NiTi shape memory alloys (SMAs) in a reducing atmosphere of N2-10\% H2. The influence of temperature on the resulting surface morphology and chemistry is elucidated. On annealing at 600 °C, the surface is covered with a thin layer of titanium oxide, which is 7.5 nm thick, while at 800 °C, the surface is covered with a golden-yellow layer of TiN of thickness more than 100 nm. The surface analysis carried out by XPS on the specimen annealed at 800 °C confirms the formation of TiN and more notably, the surface is devoid of Ni.",

author = "Lakshman Neelakantan and Srinivasan Swaminathan and Michael Spiegel and Gunther Eggeler and Hassel, \{Achim Walter\}",

year = "2009",

month = mar,

doi = "10.1016/j.corsci.2008.12.018",

language = "English",

volume = "51",

pages = "635--641",

journal = "Corrosion Science",

issn = "1879-0496",

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T1 - Selective surface oxidation and nitridation of NiTi shape memory alloys by reduction annealing

AU - Neelakantan, Lakshman

AU - Swaminathan, Srinivasan

AU - Spiegel, Michael

AU - Eggeler, Gunther

A2 - Hassel, Achim Walter

PY - 2009/3

Y1 - 2009/3

N2 - The current investigation aims in understanding the effect of short-term (300 s) annealing of NiTi shape memory alloys (SMAs) in a reducing atmosphere of N2-10% H2. The influence of temperature on the resulting surface morphology and chemistry is elucidated. On annealing at 600 °C, the surface is covered with a thin layer of titanium oxide, which is 7.5 nm thick, while at 800 °C, the surface is covered with a golden-yellow layer of TiN of thickness more than 100 nm. The surface analysis carried out by XPS on the specimen annealed at 800 °C confirms the formation of TiN and more notably, the surface is devoid of Ni.

AB - The current investigation aims in understanding the effect of short-term (300 s) annealing of NiTi shape memory alloys (SMAs) in a reducing atmosphere of N2-10% H2. The influence of temperature on the resulting surface morphology and chemistry is elucidated. On annealing at 600 °C, the surface is covered with a thin layer of titanium oxide, which is 7.5 nm thick, while at 800 °C, the surface is covered with a golden-yellow layer of TiN of thickness more than 100 nm. The surface analysis carried out by XPS on the specimen annealed at 800 °C confirms the formation of TiN and more notably, the surface is devoid of Ni.

UR - https://www.scopus.com/pages/publications/60549112987

U2 - 10.1016/j.corsci.2008.12.018

DO - 10.1016/j.corsci.2008.12.018

M3 - Article

SN - 1879-0496

VL - 51

SP - 635

EP - 641

JO - Corrosion Science

JF - Corrosion Science

IS - 3

ER -

Selective surface oxidation and nitridation of NiTi shape memory alloys by reduction annealing

Abstract

Fields of science

JKU Focus areas

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