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Structure and morphology studies of chromium film at elevated temperature in hypersonic environment

Hegde, GM and Kulkarni, V and Nagaboopathy, M and Reddy, KPJ (2012) Structure and morphology studies of chromium film at elevated temperature in hypersonic environment. In: BULLETIN OF MATERIALS SCIENCE, 35 (3). pp. 341-345.

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Official URL: http://dx.doi.org/10.1007/s12034-012-0287-5

Abstract

This paper presents the after shock heated structural and morphological studies of chromium film coated on hypersonic test model as a passive drag reduction element. The structural changes and the composition of phases of chromium due to shock heating (2850 K) are characterized using X-ray diffraction studies. Surface morphology changes of chromium coating have been studied using scanning electron microscopy (SEM) before and after shock heating. Significant amount of chromium ablation and sublimation from the model surface is noticed from SEM micrographs. Traces of randomly oriented chromium oxides formed along the coated surface confirm surface reaction of chromium with oxygen present behind the shock. Large traces of amorphous chromium oxide phases are also observed.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the Indian Academy of Sciences
Keywords: Cr coating; Cr oxidation; drag reduction; surface morphology
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Other Centres/Units > Centre for Nano Science and Engineering
Date Deposited: 06 Sep 2012 12:47
Last Modified: 06 Sep 2012 12:47
URI: http://eprints.iisc.ernet.in/id/eprint/45006

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