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XPS characterisation of surface modified Ni-Ti shape memory alloy

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XPS characterisation of surface modified Ni-Ti shape memory alloy. / Green, S. M.; Grant, D. M.; Wood, J. V.
In: Materials Science and Engineering: A, Vol. 224, No. 1–2, 31.03.1997, p. 21-26.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Green, SM, Grant, DM & Wood, JV 1997, 'XPS characterisation of surface modified Ni-Ti shape memory alloy', Materials Science and Engineering: A, vol. 224, no. 1–2, pp. 21-26. https://doi.org/10.1016/S0921-5093(96)10563-3

APA

Green, S. M., Grant, D. M., & Wood, J. V. (1997). XPS characterisation of surface modified Ni-Ti shape memory alloy. Materials Science and Engineering: A, 224(1–2), 21-26. https://doi.org/10.1016/S0921-5093(96)10563-3

Vancouver

Green SM, Grant DM, Wood JV. XPS characterisation of surface modified Ni-Ti shape memory alloy. Materials Science and Engineering: A. 1997 Mar 31;224(1–2):21-26. doi: 10.1016/S0921-5093(96)10563-3

Author

Green, S. M. ; Grant, D. M. ; Wood, J. V. / XPS characterisation of surface modified Ni-Ti shape memory alloy. In: Materials Science and Engineering: A. 1997 ; Vol. 224, No. 1–2. pp. 21-26.

Bibtex

@article{2646574664c1487eab0b5dca6d7e8247,
title = "XPS characterisation of surface modified Ni-Ti shape memory alloy",
abstract = "Ni-Ti shape memory alloy has been surface amorphised by N+ ion implantation and by controlled shot peening in order to improve surface mechanical properties. X-ray photoelectron spectroscopy (XPS) and surface wetting measurements have been used to characterise the surface modified Ni-Ti to provide a fuller understanding of the biomaterial potential of such a material. The results of this study show that both the modified and unmodified Ni-Ti surfaces were predominantly covered with TiO2 and the underlying substrate crystallography determined both the affinity for surface OH−/chemisorbed water and ultimately the wetting behaviour of distilled water. Additionally, N+ ion implanted Ni-Ti contained a TiN phase within the surface which reduced wetting, demonstrating a reduced interfacial energy. The surface concentrations of Ni were unaffected by the surface modifications, with all samples containing less than 3 at.% Ni. This study has shown that the surface TiO2 oxide layer was maintained despite the surface amorphisation treatments. It can be assumed that the TiO2 layer is almost identical in unimplanted and implanted surfaces and they will display the same biocompatibility.",
keywords = "Shape memory alloys, X-ray photoelectron spectroscopy , Amorphisation",
author = "Green, {S. M.} and Grant, {D. M.} and Wood, {J. V.}",
year = "1997",
month = mar,
day = "31",
doi = "10.1016/S0921-5093(96)10563-3",
language = "English",
volume = "224",
pages = "21--26",
journal = "Materials Science and Engineering: A",
issn = "0921-5093",
publisher = "Elsevier Ltd",
number = "1–2",

}

RIS

TY - JOUR

T1 - XPS characterisation of surface modified Ni-Ti shape memory alloy

AU - Green, S. M.

AU - Grant, D. M.

AU - Wood, J. V.

PY - 1997/3/31

Y1 - 1997/3/31

N2 - Ni-Ti shape memory alloy has been surface amorphised by N+ ion implantation and by controlled shot peening in order to improve surface mechanical properties. X-ray photoelectron spectroscopy (XPS) and surface wetting measurements have been used to characterise the surface modified Ni-Ti to provide a fuller understanding of the biomaterial potential of such a material. The results of this study show that both the modified and unmodified Ni-Ti surfaces were predominantly covered with TiO2 and the underlying substrate crystallography determined both the affinity for surface OH−/chemisorbed water and ultimately the wetting behaviour of distilled water. Additionally, N+ ion implanted Ni-Ti contained a TiN phase within the surface which reduced wetting, demonstrating a reduced interfacial energy. The surface concentrations of Ni were unaffected by the surface modifications, with all samples containing less than 3 at.% Ni. This study has shown that the surface TiO2 oxide layer was maintained despite the surface amorphisation treatments. It can be assumed that the TiO2 layer is almost identical in unimplanted and implanted surfaces and they will display the same biocompatibility.

AB - Ni-Ti shape memory alloy has been surface amorphised by N+ ion implantation and by controlled shot peening in order to improve surface mechanical properties. X-ray photoelectron spectroscopy (XPS) and surface wetting measurements have been used to characterise the surface modified Ni-Ti to provide a fuller understanding of the biomaterial potential of such a material. The results of this study show that both the modified and unmodified Ni-Ti surfaces were predominantly covered with TiO2 and the underlying substrate crystallography determined both the affinity for surface OH−/chemisorbed water and ultimately the wetting behaviour of distilled water. Additionally, N+ ion implanted Ni-Ti contained a TiN phase within the surface which reduced wetting, demonstrating a reduced interfacial energy. The surface concentrations of Ni were unaffected by the surface modifications, with all samples containing less than 3 at.% Ni. This study has shown that the surface TiO2 oxide layer was maintained despite the surface amorphisation treatments. It can be assumed that the TiO2 layer is almost identical in unimplanted and implanted surfaces and they will display the same biocompatibility.

KW - Shape memory alloys

KW - X-ray photoelectron spectroscopy

KW - Amorphisation

U2 - 10.1016/S0921-5093(96)10563-3

DO - 10.1016/S0921-5093(96)10563-3

M3 - Journal article

VL - 224

SP - 21

EP - 26

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

SN - 0921-5093

IS - 1–2

ER -