NDLI: Surface characterization of (111) and (100) textured diamond coatings deposited to silicon

Content Provider	Springer Nature Link
Author	Jackson, M. J. Robinson, G. M. Sein, H. Ahmed, W. Ali, N. Misra, D. S.
Copyright Year	2005
Abstract	The use of diamond for infrared (IR) transmitting applications is of paramount importance to the defense industries. Diamond-coated IR transmitting materials are used on smart weapons and aircraft that use substrate materials such as silicon and germanium. In this investigation, diamond sheets were deposited using chemical vapor deposition. The as-grown diamond sheets were characterized for hydrogen content using detailed IR analysis. The deconvolution of the spectra in a three-phonon region (2700–3150 cm$^{−1}$) showed a number of vibration modes corresponding to the sp $^{ m }$CH$_{ n }$ phase of carbon. The spectra representing (100) and (111) textured diamond sheets, grown under different conditions, were compared. The (100) textured sheets contained two dominant peaks centered at 2860 and 2930 cm$^{−1}$, which correspond to the symmetric and asymmetric stretch bands of the CH$_{2}$ group. However, the sheet with (111) texture displayed multiple CH, CH$_{2}$, and CH$_{3}$ peaks on the spectrum. Using a standard sample called polymethyl methacrylate with known concentration, the hydrogen content associated with various modes was evaluated in the diamond sheets. IR active hydrogen in the chemical vapor deposited diamond sheets was also calculated by evaluating the area of the IR band. A discrepancy of one order of magnitude was found in the calculated and measured value. Using these measurements we suggest that the oscillator strength of the different IR modes varies depending upon the structure and H content of CVD diamond sheets.
Starting Page	666
Ending Page	670
Page Count	5
File Format	PDF
ISSN	10599495
Journal	Journal of Materials Engineering and Performance
Volume Number	14
Issue Number	5
e-ISSN	15441024
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	chemical vapor deposition diamond infrared trans-mitting materials spectroscopy surface engineering Characterization and Evaluation of Materials Materials Science Tribology, Corrosion and Coatings Quality Control, Reliability, Safety and Risk Engineering Design
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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