Micromechanics of Ceramic-Matrix Composites at Elevated Temperatures (Advanced Ceramics and Composites, 6)

✍ Scribed by Longbiao Li

• Publisher: Springer
• Year: 2024
• Tongue: English
• Leaves: 139
• Category: Library

✦ Synopsis

Ceramic-matrix composites (CMCs) possess high specific strength and modulus at elevated temperature, and have already been applied in hot-section components in aero-engines. To ensure the operation reliability and safety of CMCs components, it is necessary to understand the micro damage mechanisms and internal damage state in the composites. This book focuses on the micromechanics of CMCs at elevated temperatures, including, the stress-strain behavior, proportional limit stress, residual strength, mechanical hysteresis, interface damage, strain response, and lifetime of CMCs at elevated temperatures. This book can help the material scientists and engineering designers to better understand and master the micromechanics of CMCs at elevated temperatures.

✦ Table of Contents

Preface
Contents
1 Introduction
1.1 Background
1.2 Damage, Fracture and Lifetime of Ceramic-Matrix Composites at Elevated Temperatures
1.2.1 Damage Behavior
1.2.2 Fracture Behavior
1.2.3 Fatigue Hysteresis Behavior
1.2.4 Interface Damage
1.2.5 Lifetime
1.2.6 Strain Response Under Creep Loading
1.3 Summary and Conclusions
References
2 Micromechanics Stress–Strain Behavior of Ceramic-Matrix Composites Under Monotonic Tensile Loading at Room and Elevated Temperatures
2.1 Introduction
2.2 Micromechanics of Damage Models
2.2.1 Damage Model of Multiple Matrix Cracking
2.2.2 Damage Model of Interface Debonding
2.2.3 Damage Model of Fiber Failure
2.3 Micromechanics of Constitutive Models
2.4 Experimental Comparisons
2.4.1 Micromechanical Tensile Stress–Strain Curve of Hi-Nicalon™ Type S SiC/SiC Minicomposite at Room Temperature
2.4.2 Micromechanical Tensile Stress–Strain Curve of Tyranno™ SA3 SiC/SiC Minicomposite at Room Temperature
2.4.3 Micromechanical Tensile Stress–Strain Curve of Tyranno™ ZMI SiC/SiC Minicomposite at Elevated Temperature
2.4.4 Micromechanical Tensile Stress–Strain Curve of Unidirectional and Cross-ply SiC/SiC Composite at Room Temperature
2.4.5 Micromechanical Tensile Stress–Strain Curve of 2D Plain Woven SiC/SiC Composite at Room Temperature
2.5 Results and Discussions
2.5.1 Effect of Fiber Volume on Time-Dependent Tensile Stress–Strain Curves
2.5.2 Effect of Saturation Matrix Crack Spacing on Time-Dependent Tensile Stress–Strain Curves
2.5.3 Effect of Interface Debonding Energy on Time-Dependent Tensile Stress–Strain Curves
2.5.4 Effect of Fiber Weibull Modulus on Time-Dependent Tensile Stress–Strain Curves
2.6 Summary and Conclusions
References
3 Micromechanics Proportional Limit Stress of Ceramic-Matrix Composites Under Monotonic Tensile Loading at Elevated Temperatures
3.1 Introduction
3.2 Micromechanics of Damage Models
3.2.1 Damage Model of Interface Oxidation
3.2.2 Damage Model of Interface Debonding
3.3 Micromechanics of Proportional Limit Stress Model
3.4 Experimental Comparisons
3.4.1 Temperature-Dependent PLS of 2D SiC/SiC Composite
3.4.2 Time-Dependent PLS of 2D SiC/SiC Composite
3.5 Results and Discussions
3.5.1 Effect of Fiber Volume on PLS
3.5.2 Effect of Interface Debonding Energy on PLS
3.5.3 Effect of Matrix Fracture Energy on PLS
3.6 Summary and Conclusions
References
4 Micromechanics Residual Strength of Ceramic-Matrix Composites Under Cyclic Fatigue Loading at Elevated Temperatures
4.1 Introduction
4.2 Micromechanics Residual Strength Model
4.3 Experimental Comparisons
4.3.1 Residual Strength of 2D SiC/[Si–N–C] Composite
4.3.2 Residual Strength of 2D SiC/SiC Composite
4.3.3 Residual Strength of 2D Nextel™ 720/Alumina
4.4 Discussions
4.4.1 Effect of Peak Stress on Residual Strength
4.4.2 Effect of Interface Shear Stress on Residual Strength
4.4.3 Effect of Fiber Weibull Modulus on Residual Strength
4.4.4 Effect of Fiber Strength on Residual Strength
4.4.5 Effect of Temperature on Residual Strength
4.5 Summary and Conclusions
References
5 Micromechanics Mechanical Hysteresis of Ceramic-Matrix Composites Under Cyclic Fatigue at Elevated Temperature
5.1 Introduction
5.2 Micromechanics of Mechanical Hysteresis Models
5.3 Experimental Comparisons
5.4 Summary and Conclusions
References
6 Micromechanics Interface Damage of Ceramic-Matrix Composites Under Cyclic Fatigue at Elevated Temperature
6.1 Introduction
6.2 Micromechanics of Interface Damage Models
6.3 Experimental Results
6.3.1 Interface Damage of 2D SiC/SiC Under Cyclic Fatigue Loading at 600, 800 and 1000 °C in Inert Atmosphere
6.3.2 Interface Damage of 2D SiC/SiC Composite Under Cyclic Fatigue Loading at 1000 °C in Air and Steam Conditions
6.3.3 Interface Damage of 2D SiC/SiC Composite Under Cyclic Fatigue Loading at 1200 °C in Air and Steam Conditions
6.3.4 Interface Damage of 2D SiC/SiC Composite Under Cyclic Fatigue Loading at 1300 °C in Air Condition
6.3.5 Interface Damage of 3D SiC/SiC Composite Under Cyclic Fatigue Loading at 1300 °C in Air Condition
6.4 Discussions
6.5 Summary and Conclusions
References
7 Micromechanics Lifetime of Ceramic-Matrix Composites Under Cyclic Fatigue Loading at Elevated Temperatures
7.1 Introduction
7.2 Micromechanics of Lifetime Models
7.3 Experimental Comparisons
7.3.1 Lifetime of 3D C/SiC at 1300 °C in Vacuum Atmosphere
7.3.2 Lifetime of 2D C/SiC at 1300 °C in Inert and Oxidative Atmospheres
7.3.3 Lifetime of 2D SiC/SiC at 1300 °C in Air and Argon Atmospheres
7.3.4 Lifetime of 3D SiC/SiC at 1300 °C in Air Atmosphere
7.4 Discussions
7.5 Summary and Conclusions
References
8 Micromechanics Strain Response of Ceramic-Matrix Composites Under Creep Loading at Elevated Temperature
8.1 Introduction
8.2 Micromechanics of Strain Response Models
8.3 Experimental Comparisons
8.4 Discussions
8.4.1 Effect of Fiber Volume on Creep Strain
8.4.2 Effect of Stress Level on Creep Strain
8.4.3 Effect of Matrix Crack Spacing on Creep Strain
8.4.4 Effect of Interface Shear Stress on Creep Strain
8.4.5 Effect of Fiber Weibull Modulus on Creep Strain
8.5 Summary and Conclusions
References
9 Micromechanics Strain Response of Ceramic-Matrix Composites Under Creep-Fatigue Loading at Elevated Temperature
9.1 Introduction
9.2 Micromechanics of Strain Response Models
9.3 Experimental Comparisons
9.4 Discussions
9.4.1 Effect of Fiber Volume Fraction on Creep-Fatigue Damage Evolution in C/SiC Composite
9.4.2 Effect of Peak Stress on Creep-Fatigue Damage Evolution in C/SiC Composite
9.4.3 Effect of Matrix Crack Spacing on Time-Dependent Creep-Fatigue Damage Evolution in C/SiC Composite
9.4.4 Effect of Temperature on Time-Dependent Creep-Fatigue Damage Evolution in C/SiC Composite
9.5 Summary and Conclusions
References