Diamond deposition on Fe-Cr-Al alloy substrates: Effect of native oxidation by XPS and XAS investigation

The electronic structures of native oxides formed on Fe-15Cr, Fe-5Al and Fe-15Cr-5Al (all in wt.%) alloys, and the corresponding effects on diamond nucleation and growth in plasma enhanced CH4-H2 atmosphere were investigated. The ambient environment exposure produces a mixed surface oxide layer cont...

Full description

Saved in:
Bibliographic Details
Published in:Journal of alloys and compounds 2018-04, Vol.740, p.887-894
Main Authors: Pan, T.J., Li, Y.S., Yang, Q., Korotin, D.M., Kurmaev, E.Z., Sanchez-Pasten, M., Zhidkov, I.S., Cholakh, S.O.
Format: Article
Language:English
Subjects:
Aluminum
Aluminum oxide
Carburization (corrosion)
Chemical compounds
CVD
Deposition
Diamond
Diamond films
Diamonds
Ferrous alloy
Ferrous alloys
Native oxide
Oxidation
Protective coatings
Substrates
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The electronic structures of native oxides formed on Fe-15Cr, Fe-5Al and Fe-15Cr-5Al (all in wt.%) alloys, and the corresponding effects on diamond nucleation and growth in plasma enhanced CH4-H2 atmosphere were investigated. The ambient environment exposure produces a mixed surface oxide layer containing the oxides of both Fe and Cr or Al on Fe-15Cr or Fe-5Al alloys, respectively. A selective oxidation of Al occurs on Fe-15Cr-5Al and it protects the other two substrate elements from oxidation. The diamond deposition behavior indicates that prior to diamond growth, a graphite intermediate layer preferentially forms on Fe-15Cr and Fe-5Al alloys, along with an internal carburization of the substrates. For Fe-15Cr-5Al, only a single diamond coating with enhanced interfacial adhesion is produced, which is attributed to the effective barrier property of the aluminum oxide passive layer. •Alloying elements affect diamond nucleation and growth.•The native oxides on alloyed ferrous alloys are characterized.•The correlation between diamond deposition and surface native oxide is elucidated.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2018.01.096