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Aluminum matrix composites

High wear resistance, high thermal conductivity, and high modulus
Low expansion, low density, and low cost
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Aluminum matrix composite is a new material with strong vitality invented with the development of modern science. Silicon carbide particle reinforced aluminum matrix composite (SiCp/Al MMC) combines the characteristics of aluminum alloy matrix, such as high thermal conductivity, high specific strength, good plastic workability, low density, high hardness, high wear resistance, high Young's modulus, low thermal expansion coefficient, etc., and is a Metal matrix composite with excellent comprehensive performance

 

Basic Properties of Xiangtou Light Material Aluminum Matrix Composite Materials

Performance indicators Unit Test temperature Low volume fraction aluminum matrix composite (not heat treated) Low volume fraction aluminum matrix composites (after heat treatment) Medium volume fractional aluminum matrix composite (not heat treated) Medium volume fractional aluminum matrix composites (after heat treatment) High volume fraction aluminum matrix composite (not heat treated) High volume fraction aluminum matrix composites (after heat treatment)
≤25vt% ≤25vt% 25~40vt% 25~40vt% ≥40vt% ≥40vt%
Density ρ（g/cm3） RT 2.8~2.85 2.85~2.95 2.95~3.05
Tensile strength Rm/MPa RT 280~450 400~600 260~450 400~600 200~420 300~550
300℃ 100~200 200~300 100~200 200~350 100~200 200~300
Elongation rate A/% RT 3~10 1~5 0.5~2
Young's modulus E/GPa RT 90~120 120~150 150~210
300℃ 80~110 110~130 140~190
Thermal conductivity Δ/[W/(mK)] RT 150~210 140~200 130~190
300℃ 130~190 125~170 100~150
Specific heat capacity J/g/K RT 0.8 0.8 0.7
linear expansion coefficient CTE/ 1E-6 /K 25-100℃ 14~18 10~14 7~10
25-300℃ 16~20 14~17 8~12

 

The main advantages of aluminum matrix composites prepared by powder metallurgy compared with those prepared by traditional processes are as follows:

strong material composition design: Ceramic content can reach 70vt%, which can meet the composition and performance requirements of aluminum matrix composite materials in all application scenarios.

The microstructure is more uniform: each element is evenly distributed in the powder mixing state to avoid particles agglomeration or segregation and other defects.

interface combination: aluminum alloy matrix without melting, low reaction temperature, to avoid Al+SiC=Al4C3(harmful brittle phase)+Si and other negative reactions.

Powder metallurgy near net forming process mature, stable quality: Through the mold design to achieve complex shape products near net forming, reduce the processing amount and processing difficulty of products, suitable for large-scale industrial production, can achieve continuous and stable production.

 

 

Silicon carbide particle reinforced aluminum matrix composite is a revolutionary high-end material with broad application prospects:

Transportation field: Mainly used for automobile/rail transit vehicle brake disc, etc., to meet the application needs of weight reduction, wear resistance and heat resistance. (Ceramic particle content 15~70vt%)

Aviation field: mainly used as key load bearing parts and sub-load bearing parts, such as helicopter automatic tilt ring, rotor system connector, etc., aircraft fuselage fin, fuel port cover, support and support beam, stator blade (blade ring); To meet the needs of weight reduction, vibration reduction or long life applications; (Ceramic particle content 30~70vt%)

Aerospace field: mainly used as secondary load bearing parts and functional parts, such as satellites, rockets of various pillars, supports, platforms, etc., to meet the application needs of weight reduction, vibration reduction, stiffness and dimensional stability; (Ceramic particle content 30~70vt%)

Electronic field: mainly used as functional parts, including electronic package shell, substrate, etc., to meet the application needs of weight reduction and thermal management; (Ceramic particle content 50~70vt%)