Abstract :

Functionally Graded Metal Matrix Composites (FGMMCs) Have Emerged As An Advanced Class Of Engineered Materials Capable Of Overcoming The Limitations Of Conventional Homogeneous Composites By Providing A Gradual Variation In Composition, Microstructure, And Mechanical Properties Across The Material Thickness. Unlike Traditional Metal Matrix Composites That Possess Uniform Reinforcement Distribution, Functionally Graded Composites Exhibit Continuously Varying Reinforcement Concentrations, Enabling Simultaneous Optimization Of Surface Hardness, Wear Resistance, Thermal Stability, Fracture Toughness, And Structural Strength. These Unique Characteristics Make FGMMCs Highly Attractive For Demanding Aerospace, Automotive, Defense, Marine, Nuclear, And Energy Applications Where Structural Components Are Exposed To Severe Thermal Gradients, Cyclic Mechanical Loading, Oxidation, And Abrasive Wear. High-temperature Components Such As Turbine Blades, Combustion Liners, Brake Discs, Heat Shields, Rocket Nozzles, And Thermal Barrier Structures Particularly Benefit From Functionally Graded Architectures Because Stress Concentrations Caused By Abrupt Material Interfaces Are Significantly Minimized. The Present Investigation Focuses On The Development Of Functionally Graded Metal Matrix Composites Through Powder Metallurgy For High-Temperature Structural Applications Using Aluminum Alloy Reinforced With Silicon Carbide Particles Exhibiting A Controlled Reinforcement Gradient Across The Composite Thickness. Various Reinforcement Volume Fractions Are Arranged Through Sequential Powder Layering, Followed By Cold Compaction And Controlled Sintering Under Optimized Processing Conditions. Advanced Characterization Techniques Including Optical Microscopy (OM), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDS), Electron Backscatter Diffraction (EBSD), And X-ray Diffraction (XRD) Are Employed To Investigate Microstructural Evolution, Reinforcement Distribution, Grain Refinement, Interfacial Bonding, And Phase Stability. Mechanical Evaluation Is Performed Through Hardness Testing, Tensile Testing, Compression Testing, Wear Analysis, And High-temperature Oxidation Studies. The Results Demonstrate That Optimized Functionally Graded Structures Exhibit Superior Hardness, Improved Thermal Stability, Enhanced Wear Resistance, And Excellent Mechanical Integrity Owing To Gradual Compositional Transitions And Refined Microstructures. The Findings Contribute Toward The Development Of Next-generation Lightweight Structural Materials For High-temperature Engineering Applications.

Published:

21-4-2025

Issue:

Vol. 25 No. 4 (2025)

Page Nos:

408-424

Section:

Articles

License:

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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