Abstract
Reactive direct-current magnetron sputter deposition was applied to produce aluminum-tungsten-nitrogen (Al-W-N) ternary alloys. By this process, nitrogen-containing solid solution alloys were formed through careful regulation of the nitrogen partial pressure. Nitrogen content was controlled such that an intermetallic subnitride material formed, rather than a stoichiometric nitride. Nitrogen addition to the Al-W binary system imparted exceptional resistance to localized corrosion in 0.1 M sodium chloride (NaCl). Surface analysis by x-ray photoelectron spectroscopy (XPS) indicated nitrogen promoted oxidation of tungsten relative to the binary Al-W, as evident from comparison of the native air-formed oxides. The enhanced oxidation of tungsten was believed to result from a reduction in the activity of the aluminum metallic species due to substoichiometric Al-N-type bonding. Nitrogen alloying in the Al-W-N system also was associated with distinct changes in peak shape in the direct Bremsstrahlung excited AlKLL Auger spectrum, which indicated a mixture of Al-Al and Al-N-type bonding. The demonstrated effect of nitrogen alloying on oxidation behavior of tungsten may provide fundamental insight into the "synergistic" effects of nitrogen alloying observed in iron-based systems.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 675-678 |
| Number of pages | 4 |
| Journal | Corrosion |
| Volume | 53 |
| Issue number | 9 |
| DOIs | |
| State | Published - Jan 1 1997 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Chemical Engineering(all)
- Materials Science(all)
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Technical Note : Observations Regarding the Effects of Nitrogen Addition to the Aluminum-Tungsten System by Reactive Sputter Deposition. / Principe, E. L.; Shaw, Barbara.
In: Corrosion, Vol. 53, No. 9, 01.01.1997, p. 675-678.Research output: Contribution to journal › Article
TY - JOUR
T1 - Technical Note
T2 - Observations Regarding the Effects of Nitrogen Addition to the Aluminum-Tungsten System by Reactive Sputter Deposition
AU - Principe, E. L.
AU - Shaw, Barbara
PY - 1997/1/1
Y1 - 1997/1/1
N2 - Reactive direct-current magnetron sputter deposition was applied to produce aluminum-tungsten-nitrogen (Al-W-N) ternary alloys. By this process, nitrogen-containing solid solution alloys were formed through careful regulation of the nitrogen partial pressure. Nitrogen content was controlled such that an intermetallic subnitride material formed, rather than a stoichiometric nitride. Nitrogen addition to the Al-W binary system imparted exceptional resistance to localized corrosion in 0.1 M sodium chloride (NaCl). Surface analysis by x-ray photoelectron spectroscopy (XPS) indicated nitrogen promoted oxidation of tungsten relative to the binary Al-W, as evident from comparison of the native air-formed oxides. The enhanced oxidation of tungsten was believed to result from a reduction in the activity of the aluminum metallic species due to substoichiometric Al-N-type bonding. Nitrogen alloying in the Al-W-N system also was associated with distinct changes in peak shape in the direct Bremsstrahlung excited AlKLL Auger spectrum, which indicated a mixture of Al-Al and Al-N-type bonding. The demonstrated effect of nitrogen alloying on oxidation behavior of tungsten may provide fundamental insight into the "synergistic" effects of nitrogen alloying observed in iron-based systems.
AB - Reactive direct-current magnetron sputter deposition was applied to produce aluminum-tungsten-nitrogen (Al-W-N) ternary alloys. By this process, nitrogen-containing solid solution alloys were formed through careful regulation of the nitrogen partial pressure. Nitrogen content was controlled such that an intermetallic subnitride material formed, rather than a stoichiometric nitride. Nitrogen addition to the Al-W binary system imparted exceptional resistance to localized corrosion in 0.1 M sodium chloride (NaCl). Surface analysis by x-ray photoelectron spectroscopy (XPS) indicated nitrogen promoted oxidation of tungsten relative to the binary Al-W, as evident from comparison of the native air-formed oxides. The enhanced oxidation of tungsten was believed to result from a reduction in the activity of the aluminum metallic species due to substoichiometric Al-N-type bonding. Nitrogen alloying in the Al-W-N system also was associated with distinct changes in peak shape in the direct Bremsstrahlung excited AlKLL Auger spectrum, which indicated a mixture of Al-Al and Al-N-type bonding. The demonstrated effect of nitrogen alloying on oxidation behavior of tungsten may provide fundamental insight into the "synergistic" effects of nitrogen alloying observed in iron-based systems.
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UR - http://www.scopus.com/inward/citedby.url?scp=0037623928&partnerID=8YFLogxK
U2 - 10.5006/1.3290299
DO - 10.5006/1.3290299
M3 - Article
VL - 53
SP - 675
EP - 678
JO - Corrosion
JF - Corrosion
SN - 0010-9312
IS - 9
ER -