The effect of Pt on Ni3Al surface oxidation at low-pressures

F. Qin; J. W. Anderegg; C. J. Jenks; B. Gleeson; D. J. Sordelet; P. A. Thiel

doi:10.1016/j.susc.2006.09.014

The effect of Pt on Ni₃Al surface oxidation at low-pressures

F. Qin, J. W. Anderegg, C. J. Jenks, B. Gleeson, D. J. Sordelet, P. A. Thiel

Physical Sciences Directorate

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

18 Scopus citations

Abstract

The fully-oxidized surface that forms on (1 1 1) oriented Ni₃Al single crystals, with and without Pt addition, at 300-900 K under oxygen pressures of ca. 10^-7 Torr was studied using XPS, AES, and LEIS. Two main types of surfaces form, depending upon oxidation temperature. At low-temperature, the predominant oxide is NiO, capped by a thin layer of aluminum oxide, which we refer to generically as Al_xO_y. At high-temperature (i.e., 700-800 K), NiO is replaced by a thick layer of Al_xO_y. By comparing samples that contain 0, 10 and 20 at.% Pt in the bulk, we find that the effect of Pt is to: (1) reduce the maximum amount of both NiO and Al_xO_y; and (2) shift the establishment of the thick Al_xO_y layer to lower temperatures. Platinum also decreases the adsorption probability of oxygen on the clean surface.

Original language	English
Pages (from-to)	146-154
Number of pages	9
Journal	Surface Science
Volume	601
Issue number	1
DOIs	https://doi.org/10.1016/j.susc.2006.09.014
State	Published - Jan 1 2007

Funding

This work was supported by the Director, Ames Laboratory, U.S. Department of Energy, Contract No. W-405-Eng-82.

Keywords

Aluminum oxide
Auger electron spectroscopy
Low-energy ion scattering (LEIS)
Nickel aluminide
Nickel oxides
Oxidation
Platinum
X-ray photoelectron spectroscopy

Access to Document

10.1016/j.susc.2006.09.014

Cite this

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title = "The effect of Pt on Ni3Al surface oxidation at low-pressures",

abstract = "The fully-oxidized surface that forms on (1 1 1) oriented Ni3Al single crystals, with and without Pt addition, at 300-900 K under oxygen pressures of ca. 10-7 Torr was studied using XPS, AES, and LEIS. Two main types of surfaces form, depending upon oxidation temperature. At low-temperature, the predominant oxide is NiO, capped by a thin layer of aluminum oxide, which we refer to generically as AlxOy. At high-temperature (i.e., 700-800 K), NiO is replaced by a thick layer of AlxOy. By comparing samples that contain 0, 10 and 20 at.\% Pt in the bulk, we find that the effect of Pt is to: (1) reduce the maximum amount of both NiO and AlxOy; and (2) shift the establishment of the thick AlxOy layer to lower temperatures. Platinum also decreases the adsorption probability of oxygen on the clean surface.",

keywords = "Aluminum oxide, Auger electron spectroscopy, Low-energy ion scattering (LEIS), Nickel aluminide, Nickel oxides, Oxidation, Platinum, X-ray photoelectron spectroscopy",

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T1 - The effect of Pt on Ni3Al surface oxidation at low-pressures

AU - Qin, F.

AU - Anderegg, J. W.

AU - Jenks, C. J.

AU - Gleeson, B.

AU - Sordelet, D. J.

AU - Thiel, P. A.

PY - 2007/1/1

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N2 - The fully-oxidized surface that forms on (1 1 1) oriented Ni3Al single crystals, with and without Pt addition, at 300-900 K under oxygen pressures of ca. 10-7 Torr was studied using XPS, AES, and LEIS. Two main types of surfaces form, depending upon oxidation temperature. At low-temperature, the predominant oxide is NiO, capped by a thin layer of aluminum oxide, which we refer to generically as AlxOy. At high-temperature (i.e., 700-800 K), NiO is replaced by a thick layer of AlxOy. By comparing samples that contain 0, 10 and 20 at.% Pt in the bulk, we find that the effect of Pt is to: (1) reduce the maximum amount of both NiO and AlxOy; and (2) shift the establishment of the thick AlxOy layer to lower temperatures. Platinum also decreases the adsorption probability of oxygen on the clean surface.

AB - The fully-oxidized surface that forms on (1 1 1) oriented Ni3Al single crystals, with and without Pt addition, at 300-900 K under oxygen pressures of ca. 10-7 Torr was studied using XPS, AES, and LEIS. Two main types of surfaces form, depending upon oxidation temperature. At low-temperature, the predominant oxide is NiO, capped by a thin layer of aluminum oxide, which we refer to generically as AlxOy. At high-temperature (i.e., 700-800 K), NiO is replaced by a thick layer of AlxOy. By comparing samples that contain 0, 10 and 20 at.% Pt in the bulk, we find that the effect of Pt is to: (1) reduce the maximum amount of both NiO and AlxOy; and (2) shift the establishment of the thick AlxOy layer to lower temperatures. Platinum also decreases the adsorption probability of oxygen on the clean surface.

KW - Aluminum oxide

KW - Auger electron spectroscopy

KW - Low-energy ion scattering (LEIS)

KW - Nickel aluminide

KW - Nickel oxides

KW - Oxidation

KW - Platinum

KW - X-ray photoelectron spectroscopy

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