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High-temperature cyclic oxidation

High-temperature cyclic oxidation of Pt-rich γ-γ’ bond-coatings. Part II: Effect of Pt and Al on TBC system lifetime

High-temperature cyclic oxidation of Pt-rich γ-γ’ bond-coatings. Part II: Effect of Pt and Al on TBC system lifetime

... at 1100 °C. Contrary to the results obtained for the same systems without top coat, aluminium addition during the bond-coating fabri- cation did not improve the durability of the TBCs with a Pt-rich γ-γ’ coating. This ...

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High-temperature cyclic oxidation behaviour of Pt-rich γ-γ’ coatings. Part I: Oxidation kinetics of coated AM1 systems after very long-term exposure at 1100 °C

High-temperature cyclic oxidation behaviour of Pt-rich γ-γ’ coatings. Part I: Oxidation kinetics of coated AM1 systems after very long-term exposure at 1100 °C

... consumption, which is due to cyclic oxidation at the metal/oxide in- terface, but also to interdiffusion with the substrate in case of a coating. For example, in this study after 3000 cycles at 1100 °C, a ...

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High-temperature cyclic oxidation of Pt-rich γ-γ’ bond-coatings. Part II: Effect of Pt and Al on TBC system lifetime

High-temperature cyclic oxidation of Pt-rich γ-γ’ bond-coatings. Part II: Effect of Pt and Al on TBC system lifetime

... The usual aluminizing temperature and time of the APVS® are re- spectively 1100 °C ± 50 °C and between 4 h and 6 h [ 15 ]. In this study, the aluminizing treatment depended on two main factors: the activator ...

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High-temperature cyclic oxidation behaviour of Pt-rich γ-γ’ coatings. Part I: Oxidation kinetics of coated AM1 systems after very long-term exposure at 1100 °C

High-temperature cyclic oxidation behaviour of Pt-rich γ-γ’ coatings. Part I: Oxidation kinetics of coated AM1 systems after very long-term exposure at 1100 °C

... After longer exposure, for instance 2000 and 5000 cycles at 1100 °C, the specimen mass change curves evidenced the excellent behaviour of the uncoated AM1. A good behaviour was also obtained for the re- ference β system ...

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Reinforced sol–gel thermal barrier coatings and their cyclic oxidation life

Reinforced sol–gel thermal barrier coatings and their cyclic oxidation life

... 3. Results and discussion 3.1. Reinforcement of thermal barriers synthesized by sol–gel route The principle of TBC reinforcement is based on the deliberate establishment of a controlled micro-crack network throughout the ...

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Modelling the high temperature oxidation of titanium alloys: Development of a new numerical tool PyTiOx

Modelling the high temperature oxidation of titanium alloys: Development of a new numerical tool PyTiOx

... very high temperatures due to their behaviour in such oxidizing con­ ...to high-temperature oxidation and oxygen embrittlement, while limiting the deterioration of their specific mechanical ...

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High-Temperature Oxidation of a High Silicon SiMo Spheroidal Cast Iron in Air with In Situ Change in H2O Content

High-Temperature Oxidation of a High Silicon SiMo Spheroidal Cast Iron in Air with In Situ Change in H2O Content

... at high air/fuel ratio, combustion gas also presents large amounts of oxygen ...studied oxidation of SiMo SGI in diesel exhaust gases and demonstrated the key role of water vapor in the oxidation ...

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Modelling the high temperature oxidation of titanium alloys: Development of a new numerical tool PyTiOx

Modelling the high temperature oxidation of titanium alloys: Development of a new numerical tool PyTiOx

... Ti-6Al-2Sn-4Zr-2Mo-Si (Ti6242s) alloy matrix, were calculated from micro-hardness profiles performed on oxidized samples [ 12 ]. They are therefore relative to a diffusion process in a two-phase a+ � matrix. In theory, ...

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Substrate Effect on the High Temperature Oxidation
Behavior of a Pt-modified Aluminide Coating. Part II:
Long-term Cyclic-oxidation Tests at 1,050 C

Substrate Effect on the High Temperature Oxidation Behavior of a Pt-modified Aluminide Coating. Part II: Long-term Cyclic-oxidation Tests at 1,050 C

... long oxidation times, and affects the phase ...better cyclic-oxidation behavior of RT22/IN792 is due to the chemical composition of the coating system that depends on the superalloy ...

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Cyclic deformation of TiAl generic microstructures at room and high temperature: Bauschinger effect & strain rate sensitivity

Cyclic deformation of TiAl generic microstructures at room and high temperature: Bauschinger effect & strain rate sensitivity

... [57] H Inui, MH Oh, A Nakamura, and M Yamaguchi. Room-temperature tensile deformation of polysynthetically twinned (PST) crystals of TiAl. Acta Metallurgica et Materialia, 40(11):3095–3104, 1992. [58] Thomas ...

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High temperature oxidation of two- and three-dimensional hafnium carbide and silicon carbide coatings

High temperature oxidation of two- and three-dimensional hafnium carbide and silicon carbide coatings

... against oxidation at very high temperature composed of hafnium and silicon carbides was realized by two synthesis ...under oxidation was studied with an arc image furnace. After ...

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Multi-Sample Thermobalance for Rapid Cyclic Oxidation Under
Controlled Atmosphere

Multi-Sample Thermobalance for Rapid Cyclic Oxidation Under Controlled Atmosphere

... Keywords: Cyclic Oxidation, Thermogravimetric Apparatus, Lamp ...to oxidation of high temperature materials, the cyclic oxidation test is used as a reference because it ...

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Reinforced sol-gel thermal barrier coatings and their cyclic oxidation life

Reinforced sol-gel thermal barrier coatings and their cyclic oxidation life

... gel; Oxidation; Reinforcement; Thermal barrier coating ...the high temperature imposed to modern engines without thermal protection and internal ...long-term high temperature ...

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Modeling Two- and Three-Stage Oxygen Tracer Experiments during High-Temperature Oxidation of Metals with a High Oxygen Solubility

Modeling Two- and Three-Stage Oxygen Tracer Experiments during High-Temperature Oxidation of Metals with a High Oxygen Solubility

... By using the Wagner model of oxidation see [8], with the hypotheses of a semiconducting oxide in which the electronic defects diffuse much faster than the anions and with the assumption [r] ...

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Modeling Two- and Three-Stage Oxygen Tracer Experiments during High-Temperature Oxidation of Metals with a High Oxygen Solubility

Modeling Two- and Three-Stage Oxygen Tracer Experiments during High-Temperature Oxidation of Metals with a High Oxygen Solubility

... of symbols Chemical activity of the specie i Universal gas constant Oxygen concentration Volume ratio of the mix gas 18O2/16O2 Oxygen diffusion coefficient in the metal Temperature Oxyge[r] ...

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Effect of H2O and CO2 on the Oxidation Behavior and Durability at High Temperature of ODS-FeCrAl

Effect of H2O and CO2 on the Oxidation Behavior and Durability at High Temperature of ODS-FeCrAl

... Creep Testing Incremental creep testing, where the stress is increased at regular intervals, is a convenient way to estimate the stress threshold in ODS alloys. Figure 9 a shows the 1,100 °C creep results for MA956 with ...

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Effect of mechanical surface treatments on the high temperature oxidation of pure titanium: the role of nitrogen

Effect of mechanical surface treatments on the high temperature oxidation of pure titanium: the role of nitrogen

... 4 CD-LASMIS, UMR CNRS 6281, Université de Technologie de Troyes, France Abstract The mechanically treated high temperature (700°C) oxidation of commercially pure titanium was studied for long ...

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Structural evolutions and internal stresses in Zr alloys during oxidation at high temperature and subsequent cooling

Structural evolutions and internal stresses in Zr alloys during oxidation at high temperature and subsequent cooling

... the oxidation temperature on the oxide structure (tetragonal and monoclinic phases of zirconia) and the internal stresses within the oxide during oxidation and subsequent cooling  First results ...

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Experimental study and numerical simulation of high temperature (1100–1250 °C) oxidation of prior-oxidized zirconium alloy

Experimental study and numerical simulation of high temperature (1100–1250 °C) oxidation of prior-oxidized zirconium alloy

... . High temperature and low temperature zirconia scales are clearly identified on our samples by the difference of microstruc- ...low temperature oxide is composed of equiaxed grains whereas the ...

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Effect of H2O and CO2 on the Oxidation Behavior and Durability at High Temperature of ODS-FeCrAl

Effect of H2O and CO2 on the Oxidation Behavior and Durability at High Temperature of ODS-FeCrAl

... the oxidation kinetics, d is the thickness of the specimen, q is the alloy density, C 0 is the initial Al content (in wt%), C b is the Al content at the onset of breakaway oxidation and t b is the time to ...

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