Carbon Fiber Reinforced Magnesium Matrix (Cf/Mg) Composites

Carbon Fiber Reinforced Magnesium Matrix (Cf/Mg) Composites: A High-Performance Metal Matrix Composite

Carbon fiber reinforced magnesium matrix (Cf/Mg) composites are high-performance materials widely applied in various advanced technology fields due to their excellent properties. Below is a detailed summary of the key aspects of this material:

1. Fabrication Processes

Pressure Infiltration Method: Optimizes the densification and mechanical properties of composites by adjusting preheating and casting temperatures.

Solid-State Synthesis: Combined with extrusion processes, it enables the production of composites with refined grains and uniform microstructures.

Powder Metallurgy with Hot Extrusion: Suitable for manufacturing high-strength composites while significantly improving material consistency.

Case Study: Vacuum pressure infiltration technology optimizes preheating and pressure parameters for short carbon fiber composites, enhancing overall performance.

2. Microstructure and Properties

Grain Refinement: Higher extrusion temperatures facilitate the formation of uniform and fine microstructures.

High-Temperature Microstructural Evolution: Research has revealed the dynamic microstructural changes in composites under high-temperature conditions, providing theoretical guidance for performance improvement.

3. Interface Bonding and Properties

Interface Reactions: Increased aluminum content in the magnesium matrix may intensify interfacial reactions, directly affecting the quality of bonding.

Reinforcement Mechanism: Interface bonding plays a critical role in enhancing the composite’s overall performance.

4. Corrosion Resistance

Rare Earth Surface Modification: Significantly improves corrosion resistance through the application of rare earth elements.

Chemical Plating Technology: Nickel-phosphorus (Ni-P) alloy plating layers effectively enhance corrosion resistance, particularly in harsh environments.

5. Multiscale Simulation and Prediction

Modeling and Prediction: Multiscale modeling methods predict the elastic modulus of carbon fiber reinforced magnesium matrix composites, providing guidance for optimizing laminate design.

6. High-Temperature Deformation Behavior

Experimental Studies: Reveal dynamic recrystallization behavior of composites at high temperatures.

Computational Simulations: Simulate microstructural evolution in high-temperature environments, offering theoretical insights into deformation mechanisms.

7. Novel Composites and Applications

Exploration in Construction: Mineral-impregnated carbon fiber composites show potential for architectural applications.

High-Temperature Applications: Micro/nanoscale reinforcement strategies provide theoretical and technical support for use in extreme high-temperature conditions.

8. Typical Types and Specifications

Material Models:

T300/AZ91D and T700/AZ91D: Represent different grades of carbon fiber and magnesium alloys.

T300/AZ31D and T700/AZ31D: Feature low density and high strength.

Performance Characteristics: These combinations cater to the diverse requirements of fields such as aerospace and electronics.

Conclusion

Cf/Mg composites have made significant progress in areas such as fabrication processes, microstructural control, interface optimization, corrosion resistance, and high-temperature deformation studies. Multiscale simulation and novel reinforcement strategies further expand the potential applications of these materials. Future research should aim to refine fabrication techniques and enhance material stability and applicability under extreme conditions.