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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/24650

Title: Nanocrystalline Metal Enabled Conductors for Enhanced Strength-to-weight Aerospace Electrical Wiring
Authors: Winfield, Ian
Advisor: Erb, Uwe
Department: Materials Science and Engineering
Keywords: Nanocrystalline
Strength-to-Weight
Aerospace
Conductors
Electrodeposition
Composite
Wire
Issue Date: 28-Jul-2010
Abstract: High strength-to-weight nanocrystalline alloy enabled conductor (NEC) prototypes were successfully developed by reinforcing an oxygen-free copper core material with electrodeposited cobalt phosphorus (CoP) coatings. A rule of mixtures approach was utilized to design the NEC prototypes to meet materials performance indices. Three unique NEC prototypes were produced with CoP coatings composed of alternating nanocrystalline (11 nm) and coarse-grained layers. The tensile properties were dependant on the coating microstructures, with tensile strengths of 1000 MPa, 970 MPa, and 900 MPa, respectively, and corresponding tensile elongations of 4.6%, 6.1%, and 10%, respectively. The electrical conductivity of the NEC prototypes was ~58 %IACS (resistivity of ~2.96 µΩ-cm). The rule of mixtures approach effectively predicted the tensile strength and conductivity. The NEC samples were significantly stronger than the incumbent high-strength aerospace conductor material, Be-Cu alloy CS95, which exhibits a tensile strength of only 655 MPa and conductivity of 63 %IACS.
URI: http://hdl.handle.net/1807/24650
Appears in Collections:Master
Department of Materials Science & Engineering - Master theses

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