Towards large area deposition of Cr2AlC on steel

Cr2AlC belongs to the MAX phases, which are promising materials for protective coatings on steel due to their unique combination of properties like corrosion and oxidation resistance, good electrical conductivity, low friction coefficient, damage tolerance, and high temperature stability. Here the d...

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Bibliographic Details
Published in:Thin solid films 2006-10, Vol.515 (2), p.389-393
Main Authors: WALTER, C, SIGUMONRONG, D. P, EL-RAGHY, T, SCHNEIDER, J. M
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Deposition by sputtering
Electrical properties of specific thin films
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Exact sciences and technology
Materials science
Methods of deposition of films and coatings
film growth and epitaxy
Physics
Structure and morphology
thickness
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
Thin film structure and morphology
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Summary:Cr2AlC belongs to the MAX phases, which are promising materials for protective coatings on steel due to their unique combination of properties like corrosion and oxidation resistance, good electrical conductivity, low friction coefficient, damage tolerance, and high temperature stability. Here the deposition of Cr2AlC thin films has been carried out by magnetron sputtering of a Cr2AlC compound target. The effect of the substrate temperature on the constitution was investigated. It was found that the MAX phase structure is stable in a substrate temperature range between 1123 K and 723 K. At lower substrate temperatures, the structure of the film is X-ray amorphous. A temperature of approximately 870 K was determined for the transition from amorphous to crystalline Cr2AlC using differential scanning calorimetry. A phase purity of more than 90% MAX phase in the films was reached and the equilibrium volume is in excellent agreement with our ab initio calculations. The here presented deposition method provides a pathway towards large area deposition of MAX phase Cr2AlC coatings on steel.
ISSN:0040-6090
1879-2731
DOI:10.1016/j.tsf.2005.12.219