Effect of Si addition on the oxidation resistance of Co–Re–Cr-alloys: Recent attainments in the development of novel alloys
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Bronislava Gorr
, Steffen Burk , Timo Depka , C. Somsen , Hisham Abu-Samra , H.-J. Christ und G. Eggeler
Abstract
The influence of silicon on the oxidation behaviour of Co—Re—Cr-alloys has been studied at 1 000°C and 1 100°C. Consideration was given to the synergetic effects between chromium and silicon with respect to the development of a protective Cr2O3 layer. The Si addition to the Co—Re-alloys produces a significant decrease in the evaporation rate of Re oxides. Moreover, the beneficial influence in the transient oxidation period results in a rapid formation of Cr2O3 scale. While the addition of 1 and 2 at.% Si to the ternary Co-17Re-23Cr alloy was insufficient to form a continuous Cr2O3 scale, the addition of 3 at.% silicon caused a change in the oxidation mode resulting in the formation of a nearly continuous Cr2O3 scale. On the oxide/alloy interface of the alloy Co-17Re-30Cr-2Si, a continuous and dense Cr2O3 scale was observed, which remained stable after 100 h exposure protecting the metallic substrate.
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© 2012, Carl Hanser Verlag, München
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- Editorial January 2012
- Original Contributions
- High-strength aluminum-based light-weight materials for safety components – recent progress by microstructural refinement and particle reinforcement
- Microstructure – deformation relationships in fine grained high manganese TWIP steel – the role of local texture
- Microstructure of a eutectic NiAl—Mo alloy directionally solidified using an industrial scale and a laboratory scale Bridgman furnace
- Effect of Si addition on the oxidation resistance of Co–Re–Cr-alloys: Recent attainments in the development of novel alloys
- Corrosion behavior of silicon oxycarbide-based ceramic nanocomposites under hydrothermal conditions
- Thermal cycling damage evolution of a thermal barrier coating and the influence of substrate creep, interface roughness and pre-oxidation
- Influence of creep and cyclic oxidation in thermal barrier coatings
- Residual stress states as a result of bending and straightening processes of steels in different heat treatment conditions
- Residual stresses under quasi-static and cyclic loading in shot peened Inconel 718
- Investigation of the surface residual stresses in spray cooled induction hardened gearwheels
- Stress-gradient induced fatigue at ultra high frequencies in sub micron thin metal films
- Influence of graphite spherical size on fatigue behaviour and fracture toughness of ductile cast iron EN-GJS-400-18LT
- Failure behaviour of the superalloy MAR-M247 LC under LCF, HCF and combined LCF/HCF loading
- Measuring techniques for the very high cycle fatigue behaviour of high strength steel at ultrasonic frequencies
- Failure limits of continuous carbon fibre reinforced plastics loaded with fibre parallel compression
- Development of an integrative simulation method to predict the microstructural influence on the mechanical behaviour of semi-crystalline thermoplastic parts
- DGM News
- DGM News
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- Editorial January 2012
- Original Contributions
- High-strength aluminum-based light-weight materials for safety components – recent progress by microstructural refinement and particle reinforcement
- Microstructure – deformation relationships in fine grained high manganese TWIP steel – the role of local texture
- Microstructure of a eutectic NiAl—Mo alloy directionally solidified using an industrial scale and a laboratory scale Bridgman furnace
- Effect of Si addition on the oxidation resistance of Co–Re–Cr-alloys: Recent attainments in the development of novel alloys
- Corrosion behavior of silicon oxycarbide-based ceramic nanocomposites under hydrothermal conditions
- Thermal cycling damage evolution of a thermal barrier coating and the influence of substrate creep, interface roughness and pre-oxidation
- Influence of creep and cyclic oxidation in thermal barrier coatings
- Residual stress states as a result of bending and straightening processes of steels in different heat treatment conditions
- Residual stresses under quasi-static and cyclic loading in shot peened Inconel 718
- Investigation of the surface residual stresses in spray cooled induction hardened gearwheels
- Stress-gradient induced fatigue at ultra high frequencies in sub micron thin metal films
- Influence of graphite spherical size on fatigue behaviour and fracture toughness of ductile cast iron EN-GJS-400-18LT
- Failure behaviour of the superalloy MAR-M247 LC under LCF, HCF and combined LCF/HCF loading
- Measuring techniques for the very high cycle fatigue behaviour of high strength steel at ultrasonic frequencies
- Failure limits of continuous carbon fibre reinforced plastics loaded with fibre parallel compression
- Development of an integrative simulation method to predict the microstructural influence on the mechanical behaviour of semi-crystalline thermoplastic parts
- DGM News
- DGM News