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MCrAlY型涂层合金成分对合金相变和高温氧化寿命的影响

摘要第3-4页
Abstract第4-5页
Chapter 1 Introduction第10-36页
    1.1 Overview第10-12页
    1.2 Thermal barrier coatings (TBCs)第12-19页
        1.2.1 Top coat第13-14页
            1.2.1.1 Materials used第13-14页
            1.2.1.2 Deposition techniques第14页
        1.2.2 Bond coat第14-19页
            1.2.2.1 Diffusion coatings第14-15页
            1.2.2.2 Overlay coatings第15-19页
                1.2.2.2.1 Role of alloying constituents第17-18页
                1.2.2.2.2 Typical application method第18-19页
    1.3 High-temperature oxidation of metals and alloys第19-28页
        1.3.1 Oxidation mechanism第19-20页
        1.3.2 Thermodynamics of oxidation第20-22页
        1.3.3 Protectiveness of oxide scale第22页
        1.3.4 Oxidation kinetics第22-23页
            1.3.4.1 Linear growth law第23页
            1.3.4.2 Parabolic growth law第23页
            1.3.4.3 Logarithmic growth law第23页
        1.3.5 Oxidation of alloys第23-26页
            1.3.5.1 Noble A and reactive B第24-25页
            1.3.5.2 Reactive A and reactive B第25-26页
        1.3.6 Oxidation in multicomponent systems第26-28页
            1.3.6.1 Oxidation of complex Ni-rich coating alloys第27页
            1.3.6.2 Oxidation of complex Co-rich coating alloys第27-28页
            1.3.6.3 Selective oxidation of Al in complex Co-rich and Ni-rich alloys第28页
    1.4 High-temperature coating degradation第28-32页
        1.4.1 Thermal aging failure第31页
        1.4.2 Thermal fatigue failure第31页
        1.4.3 Aluminum depletion failure第31-32页
    1.5 Coating life assessment第32-33页
    1.6 Research goals and outline of dissertation第33-36页
        1.6.1 Thermodynamic modelling of bond coat microstructures第34页
        1.6.2 Subscale depletion analysis and modelling of the high-temperature oxidationprocesses第34页
        1.6.3 Influence of bond coat composition on chemical life of MCrAlY alloys第34-35页
        1.6.4 Thermochemical modelling of the subscale phase accumulation processes第35-36页
Chapter 2 Experimental Method第36-45页
    2.1 Alloy melting第36页
    2.2 Heat-treatments第36-37页
    2.3 Isothermal oxidation第37-38页
        2.3.1 Weight gain measurments第38页
    2.4 Characterization techniques第38-42页
        2.4.1 Hardness measurements第38页
        2.4.2 Composition analysis第38-39页
        2.4.3 Microstructural investigation第39页
        2.4.4 Phase identification第39页
        2.4.5 Subscale concentration analysis第39-40页
        2.4.6 Quantitative phase analysis第40-42页
    2.5 Modelling procedure第42-45页
Chapter 3 Thermodynamic modelling of bond coat microstructures第45-58页
    3.1 Alloy compositions and experimental conditions第46页
    3.2 Experimental Microstructural Evolution第46-50页
    3.3 Thermodynamic Modeling of Phase Equilibria第50-54页
    3.4 Microstructural Influence on Alloy Hardness第54-56页
    3.5 Conclusions第56-58页
Chapter 4 Subscale depletion analysis and modelling of the high-temperature oxidationprocesses第58-70页
    4.1 Alloy compositions and experimental conditions第59-60页
    4.2 High-temperature oxidation第60-62页
    4.3 Modelling of high-temperature oxidation behavior第62-66页
    4.4 Hardness prediction in alloy’s cross-section第66-68页
    4.5 Conclusions第68-70页
Chapter 5 Influence of bond coat composition on chemical life of the alloys第70-94页
    5.1 Alloy compositions and experimental conditions第71页
    5.2 Microstructural characteristics第71-75页
    5.3 High-temperature oxidation第75-81页
        5.3.1 Isothermal oxidation kinetics第75-78页
        5.3.2 Scale morphology第78-81页
    5.4 Alloy diffusion第81-84页
    5.5 Lifetime prediction第84-92页
        5.5.1 Surface oxidation第84-87页
        5.5.2 Surface oxidation and substrate interdiffusion第87-90页
        5.5.3 Compositional effects on lifetime第90-92页
    5.6 Conclusions第92-94页
Chapter 6 Thermochemical modelling of the subscale phase accumulation processes第94-113页
    6.1 Alloy compositions and experimental conditions第94-95页
    6.2 Microstructural characteristics of starting alloys第95-98页
    6.3 Microstructural characteristics of oxidized alloy第98-101页
    6.4 Oxidation kinetics of the alloys第101-103页
    6.5 Subscale accumulation第103-106页
    6.6 Accumulation mechanism and kinetics第106-111页
    6.7 Conclusions第111-113页
Chapter 7 Conclusions第113-115页
References第115-125页
Acknowledgements第125-127页
Curriculum Vitae第127-128页
List of Publications第128-129页
Conference Presentations第129页

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