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Index
Cover
Title page
Copyright page
Dedication page
Acknowledgments
Contributors List
1 Introduction
1.1 Background
1.2 Ultra-High Temperature Ceramics
1.3 Description of Contents
References
2 A Historical Perspective on Research Related to Ultra-High Temperature Ceramicsa
2.1 Ultra-High Temperature Ceramics
2.2 Historic Research
2.3 Initial NASA Studies
2.4 Research Funded by the Air Force Materials Laboratory
2.5 Summary
Acknowledgments
References
3 Reactive Processes for Diboride-Based Ultra-High Temperature Ceramics
3.1 Introduction
3.2 Reactive Processes for the Synthesis of Diboride Powders
3.3 Reactive Processes for Oxygen Removing during Sintering
3.4 Reactive Sintering Processes
3.5 Summary
References
4 First-Principles Investigation on the Chemical Bonding and Intrinsic Elastic Properties of Transition Metal Diborides TMB2 (TM=Zr, Hf, Nb, Ta, and Y)
4.1 Introduction
4.2 Calculation Methods
4.3 Results and Discussion
4.4 Conclusion Remarks
Acknowledgment
References
5 Near-Net-Shaping of Ultra-High Temperature Ceramics
5.1 Introduction
5.2 Understanding Colloidal Systems: Interparticle Forces
5.3 Near-Net-Shape Colloidal Processing Techniques
5.4 Summary, Recommendations, and Path Forward
Acknowledgments
References
6 Sintering and Densification Mechanisms of Ultra-High Temperature Ceramics
6.1 Introduction
6.2 MB2 with Metals
6.3 MB2 with Nitrides
6.4 MB2 with Metal Disilicides
6.5 MB2 with Carbon or Carbides
6.6 MB2 with SiC
6.7 MB2–SiC Composites with Third Phases
6.8 Effects of Sintering Aids on High-Temperature Stability
6.9 Transition Metal Carbides
6.10 Conclusions
Acknowledgments
References
7 UHTC Composites for Hypersonic Applications
7.1 Introduction
7.2 Preparation of Continuous-Fiber-Reinforced UHTC Composites
7.3 UHTC Coatings
7.4 Short-Fiber-Reinforced UHTC Composites
7.5 Hybrid UHTC Composites
7.6 Summary and Future Prospects
References
8 Mechanical Properties of Zirconium-Diboride Based UHTCs
8.1 Introduction
8.2 Room Temperature Mechanical Properties
8.3 Elevated-Temperature Mechanical Properties
8.4 Concluding Remarks
References
9 Thermal Conductivity of ZrB2 and HfB2
9.1 Introduction
9.2 Conductivity of ZrB2 and HfB2
9.3 ZrB2 and HfB2 Composites
9.4 Electron and Phonon Contributions to Thermal Conductivity
9.5 Concluding Remarks
References
10 Deformation and Hardness of UHTCs as a Function of Temperature
10.1 Introduction
10.2 Elastic Properties
10.3 Hardness
10.4 Hardness and Yield Strength
10.5 Deformation Mechanism Maps
10.6 Lattice Resistance to Dislocation Glide
10.7 Dislocation Glide Controlled by Other Obstacles
10.8 Deformation by Creep
10.9 Deformation of Carbides versus Borides
10.10 Conclusions
References
11 Modeling and Evaluating the Environmental Degradation of UHTCs under Hypersonic Flow
11.1 Introduction
11.2 Oxidation Modeling
11.3 UHTC Behavior under Simulated Hypersonic Conditions
11.4 Comparing Model Predictions to Leading-Edge Behavior
11.5 Behavior of UHTCs under Other Test Methods
11.6 Summary
References
12 Tantalum Carbides: Their Microstructures and Deformation Behavior
12.1 Crystallography of Tantalum Carbides
12.2 Microstructures of Tantalum Carbides
12.3 Mechanical Properties of Tantalum Carbides
12.4 Summary
Acknowledgments
References
13 Titanium Diboride
13.1 Introduction
13.2 Phase Diagram, Crystal Structure, and Bonding
13.3 Synthesis of Titanium Diboride Powders
13.4 Densification of Transition Metal Borides
13.5 Mechanical Properties at Ambient and Elevated Temperatures
13.6 Physical Properties and Oxidation Resistance
13.7 Oxidation Resistance
13.8 Tribological Properties
13.9 Applications of TiB2
13.10 Conclusions
References
14 The Group IV Carbides and Nitrides
14.1 Background
14.2 Group IV Carbides
14.3 Preparation and Processing
14.4 Mechanical and Physical Properties
14.5 Oxidation of the UHTC Carbides and Nitrides
14.6 Oxidation of the UHTC Carbides
14.7 UHTC Nitrides
14.8 Preparation, Diffusion, and Phase Formation
14.9 Mechanical and Physical Properties
14.10 Oxidation of Nitrides
14.11 Conclusions and Future Research
Acknowledgments
References
15 Nuclear Applications for Ultra-High Temperature Ceramics and MAX Phases
15.1 Future Nuclear Reactors
15.2 Current Nuclear Ceramics
15.3 Future Nuclear Ceramics
15.4 Non-Oxide Nuclear Fuels
15.5 Other Possible Future Fission and Fusion Applications
15.6 Thermodynamics of Nuclear Systems
15.7 Conclusions
References
16 UHTC-Based Hot Structures
16.1 Introduction
16.2 TPS: Test Articles and Prototypes
16.3 Plasma Tests of Nose Test Articles
16.4 Expert Project: Computational Fluid Dynamics Computations and Plasma Tests
16.5 In-Fling Testing of the Capsule “SHARK”
16.6 Future Work
References
Index
End User License Agreement
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