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Microstructure, str...
Microstructure, stress and mechanical properties of arc-evaporated Cr-C-N coatings
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- Almer, J (författare)
- Linköpings universitet,Konstruktionsmaterial,Tekniska högskolan
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- Odén, Magnus, 1965- (författare)
- Linköpings universitet,Tekniska högskolan,Konstruktionsmaterial
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- Håkansson, G (författare)
- Bodycote Värmebehandling AB Linköping
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(creator_code:org_t)
- 2001
- 2001
- Engelska.
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Ingår i: Thin Solid Films. - 0040-6090 .- 1879-2731. ; 385:1-2, s. 190-197
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The relationships between coating microstructure and properties in the Cr-C-N system have been investigated as a function of composition and post-deposition annealing. Coatings of varying compositions were grown using arc-evaporation, by varying the reactive gas flow ratio fR = f(C2H4)/f(N2) from 0 to 0.2, and were found to consist primarily of the cubic d-Cr(C,N) phase. Changes in both the unstressed lattice parameter, ao, and X-ray diffraction background intensity indicate that both the carbon concentration within the d-phase and amorphous/crystalline content increases with fR. Increasing fR also decreases the magnitude of the compressive biaxial residual stress, from approximately 6 to 1 GPa, while increasing both the inhomogeneous stress and thermal stability. The elastic modulus and hardness of as-deposited coatings were determined from nanoindentation to be 320 and 23 GPa, respectively, for moderate carbon concentrations (fR=0.05). Concurrent variations in microstructure and hardness with post-deposition annealing indicate that the as-deposited hardness is significantly enhanced by the microstructure, primarily by lattice defects and related stresses (microstresses) rather than average stresses (macrostresses).
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- TEKNIKVETENSKAP
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