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- Benjamin M. DeKoven
- The Dow Chemical Company, Central Research Catalysis Laboratory, 1776 Building, Midland, Michigan 48674
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- Patrick L. Hagans
- The Dow Chemical Company, Central Research Catalysis Laboratory, 1776 Building, Midland, Michigan 48674
抄録
<jats:p>The coefficient of friction for both clean and oxygen exposed contacting polycrystalline Fe surfaces was measured in ultrahigh vacuum (UHV) using a pin on flat device. This system was chosen in order to examine the influence of very thin oxide films (≤20 Å) on friction. The surfaces were then examined in situ in the same UHV chamber using both x-ray photoelectron spectroscopy (XPS) and scanning Auger microprobe (SAM). The oxide thickness was determined using O (1s) XPS intensities. The loads used were 0.12–0.16 N. The Fe pin (radius=0.005 m) motion was linear over 0.004 m at a speed of 5×10−6 m/s. The friction coefficient measured for the ‘‘clean’’ (∼0.2–1.0 Å oxide) surfaces was 3.0–5.8. Large stick slips were seen during these measurements. The friction dropped monotonically for increasing oxide thickness (≤25 Å) to 1.7–2.0. Auger line scan studies of the O/Fe ratio in several scars showed a large depletion of O in the contacted area. Even though the Fe flat surface is deformed up to depths of 3 μm during sliding and loading, the presence of the very thin oxide layer (≤25 Å) moderates the friction.</jats:p>
収録刊行物
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- Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films
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Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films 8 (3), 2393-2400, 1990-05-01
American Vacuum Society
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詳細情報 詳細情報について
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- CRID
- 1360011143769157760
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- NII論文ID
- 80005357539
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- DOI
- 10.1116/1.576704
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- ISSN
- 15208559
- 07342101
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- データソース種別
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- Crossref
- CiNii Articles