Diamond coating of steel at high temperatures in hot filament chemical vapour deposition (HFCVD) employing chromium interlayers

Bareiss C, Perle M, Rosiwal S, Singer R (2006)

Publication Language: English

Publication Status: Published

Publication Type: Journal article

Publication year: 2006

Journal

Diamond and Related Materials Elsevier

Publisher: ELSEVIER SCIENCE SA

Book Volume: 15

Pages Range: 754-760

Journal Issue: 4-8

DOI: 10.1016/j.diamond.2005.10.053

Abstract

Since diamond coating via hot filament chemical vapour deposition (HFCVD) processes is possible, the coating of steel substrates is in the focus of research programs. As the direct deposition onto steel is not possible yet, the role of interlayers is of extraordinary importance. In this work, we deposited diamond onto steel samples with chromium carbide interlayers at temperatures above 800 degrees C without film delamination after deposition. Further advantages of this process are an improved chemical activation of the surface at high temperatures, a higher growth rate and a higher quality (sp(3)-ratio) of the diamond film. The mismatch in thermal expansion of diamond, interlayer and steel leads to high residual compressive stresses in the diamond layer, but about 30% less than theoretically expected. We ascribe this stress reduction to the specific thermal expansion characteristics of a certain class of steels, which show a alpha-gamma phase transformation during cooling down from 850 degrees C. This transformation from closer packed gamma-phase (fcc-structure, austenite) to alpha-phase (bcc-structure, ferrite) comes along with a volume expansion of approx. 1% and enables the reduction of the high residual compressive stresses in the diamond film, analysed via Raman spectroscopy. (c) 2005 Elsevier B.V. All rights reserved.

Authors with CRIS profile

Stefan Rosiwal Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle) Robert Singer Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)

Related research project(s)

Activity CVD diamond on Steel Jan. 1, 2000 - Jan. 1, 2003 Activity Characterisation of diamond coated steel tools Jan. 1, 2000 - Jan. 1, 2003

How to cite

APA:

Bareiss, C., Perle, M., Rosiwal, S., & Singer, R. (2006). Diamond coating of steel at high temperatures in hot filament chemical vapour deposition (HFCVD) employing chromium interlayers. Diamond and Related Materials, 15(4-8), 754-760. https://dx.doi.org/10.1016/j.diamond.2005.10.053

MLA:

Bareiss, Christian, et al. "Diamond coating of steel at high temperatures in hot filament chemical vapour deposition (HFCVD) employing chromium interlayers." Diamond and Related Materials 15.4-8 (2006): 754-760.

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