2. Selection of the Matrix Material
3. Materials and Methods
3.1. Composite Manufacturing
3.2. Characterization Methods
4.1. Microstructure of an Al-Sn Matrix Alloy
4.2. Conditional Yield Stress, Microhardness, Shear Modulus, and Young’s Modulus of the Matrix Alloy
4.3. Fracture Surfaces of A CF/Al-Sn Wire
4.4. Strength of a CF/Al-Sn Wire and Effective Fiber Strength
4.5. Microstructure of a CF/Al-Sn Wire
5.1. Matrix Alloy
5.2. Composite CF/Al-Sn-Wire
- The effect of tin content in the Al-Sn alloy in the range from 0 to 100 at.% on its mechanical properties was studied. An increase in the tin content leads to a monotonic decrease in the microhardness and conditional yield stress of the Al-Sn alloy from 305 to 63 MPa and from 32 to 5 MPa, respectively. In addition, Young’s modulus and the shear modulus of the Al-Sn alloy decrease from 65 to 52 GPa and from 24 to 20 GPa, respectively. The change in these mechanical properties is almost linear, which is most likely due to an almost complete absence of mutual solubility and interaction between aluminum and tin.
- The effect of tin content in the Al-Sn matrix alloy in the range from 0 to 50 at.% on the strength of the CF/Al-Sn composite subjected to three-point bending was also investigated. Increasing tin content up to 50 at.% leads to a linear increase in the composite strength from 1450 to 2365 MPa, which is due to an increase in the effective fiber strength from 65 to 89%.
- The addition of tin up to 50 at.% to the matrix alloy leads to the formation of weak boundaries between the matrix and the fiber. This is most likely due to the suppression of the chemical reaction between aluminum and carbon and the fact that, in the composite structure, tin is predominantly located in the spaces between the fiber and aluminum grains. An increase in the composite strength is accompanied by an increase in the average length of the fibers pulled out at the fracture surface.
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
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