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Questions and Answers
What are the most used composites in aerospace applications?
What are the most used composites in aerospace applications?
- Metal-Matrix Composites (MMCs)
- Polymer-Matrix Composites (PMCs) (correct)
- Hybrid Metal/Polymeric Composites
- Ceramic-Matrix Composite (CMCs)
What type of reinforcement is used in Metal-Matrix Composites (MMCs)?
What type of reinforcement is used in Metal-Matrix Composites (MMCs)?
- Metallic particles (correct)
- Boron fibers
- Carbon fibers
- Aluminum fibers
What are the main applications of Metal-Matrix Composites (MMCs) in aerospace?
What are the main applications of Metal-Matrix Composites (MMCs) in aerospace?
- High-temperature airframe structures
- Engine components such as fan and compressor blades (correct)
- Undercarriage components such as struts and tubes
- Spacecraft components
For what temperature range are Ceramic-Matrix Composites (CMCs) mainly used?
For what temperature range are Ceramic-Matrix Composites (CMCs) mainly used?
What properties do Ceramic-Matrix Composites (CMCs) combine?
What properties do Ceramic-Matrix Composites (CMCs) combine?
Which type of composite material is mainly used for high-temperature applications in gas turbine engines and spacecrafts?
Which type of composite material is mainly used for high-temperature applications in gas turbine engines and spacecrafts?
What are the limitations of Metal-Matrix Composites (MMCs)?
What are the limitations of Metal-Matrix Composites (MMCs)?
What type of fibers are commonly used for reinforcement in Metal-Matrix Composites (MMCs)?
What type of fibers are commonly used for reinforcement in Metal-Matrix Composites (MMCs)?
What are the main applications of Metal-Matrix Composites (MMCs) in aerospace?
What are the main applications of Metal-Matrix Composites (MMCs) in aerospace?
Which composite material combines the high-temperature properties of ceramics with the strength of fiber reinforcement?
Which composite material combines the high-temperature properties of ceramics with the strength of fiber reinforcement?
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Study Notes
Aerospace Composites
- The most used composites in aerospace applications include Ceramic-Matrix Composites (CMCs) and Metal-Matrix Composites (MMCs).
Metal-Matrix Composites (MMCs)
- Reinforcement in MMCs is typically fiber-based, using materials like silicon carbide (SiC), alumina (Al2O3), and carbon fibers.
- Main applications of MMCs in aerospace include:
- High-performance components (e.g., turbine blades, engine components)
- Advanced structural components (e.g., rocket motor cases, high-stress fasteners)
Ceramic-Matrix Composites (CMCs)
- CMCs are mainly used for high-temperature applications (up to 1000°C) in gas turbine engines and spacecraft.
- CMCs combine the high-temperature properties of ceramics with the strength of fiber reinforcement.
- Properties of CMCs include:
- High thermal shock resistance
- High mechanical strength
- Low thermal conductivity
Limitations and Applications
- Limitations of MMCs include:
- High production costs
- Difficulty in fabricating complex shapes
- Main applications of MMCs in aerospace include:
- High-performance components
- Advanced structural components
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