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Effect of manufacturing process on the properties of carbon fiber-aluminium composites

Bartłomiej Przybyszewski

Abstract

In this work the effect of manufacturing process on the properties of carbon fiber/aluminium composites, produced by high pressure die casting and gas pressure infilitration, is presented. It was also investigated how these properties are affected by a nickel-phosphorous coating fabricated on the carbon fiber surface by electroless metallization. The composites were made in the form of 3D fabric from high tensile strength (HTS) fibers from the Toho Tenax company and the 226D aluminium-silicon alloy (AlSi9Cu3). The accuracy of the samples was assessed by computed axial tomography (CT) scan, whereas their microstructure was observed by scanning electron microscopy (SEM). Selected mechanical properties of the obtained materials were examined, including tensile and bending strengths, as well as hardness, which helped evaluate the effectiveness of carbon fiber as a reinforcement. Furthermore, the studies allowed an evaluation of the effectiveness of the nickel-phosphorous coating as an intermediate layer. The results of the studies proved the purposefulness of research on carbon fiber/aluminium composites. Several problems occurring in their production have been revealed, such as the low wettability of fibers by the liquid alloy, high reactivity of the components and differences in their thermal expansion. The CT scans have demonstrated that while the carbon fabrics were fully infiltrated by the aluminium alloy, pores and non-infiltrated spaces between fibers occurred in the composite structure. Based on the resistance measurement results, the bonding between the components was found to be imperfect. The use of nickel-coating fibers partly eliminates the problems associated with the production and improve resistance of the composites. This is evidenced from better resistance results for composites with nickel-coated fibers compared to composites with non-coated fibers.
Record ID
WUT1aaae09bb75b43b4b3d1625855f58de4
Diploma type
Master of Science
Author
Bartłomiej Przybyszewski (FMSE/DSMP) Bartłomiej Przybyszewski,, Division of Ceramic Materials and Polymers (FMSE/DSMP)Faculty of Materials Science and Engineering (FMSE)
Title in Polish
Wpływ technologii wytwarzania na właściwości kompozytów aluminium-włókno weglowe
Supervisor
Anna Boczkowska (FMSE/DSMP) Anna Boczkowska,, Division of Ceramic Materials and Polymers (FMSE/DSMP)Faculty of Materials Science and Engineering (FMSE)
Certifying unit
Faculty of Materials Science and Engineering (FMSE)
Affiliation unit
Division of Ceramic Materials and Polymers (FMSE/DSMP)
Study subject / specialization
, Nowoczesne Materiały Konstrukcyjne
Language
(pl) Polish
Status
Finished
Defense Date
10-07-2012
Issue date (year)
2012
Internal identifier
IM-001613
Reviewers
Marcin Leonowicz (FMSE/DCFM) Marcin Leonowicz,, Division of Construction and Functional Materials (FMSE/DCFM)Faculty of Materials Science and Engineering (FMSE) Dariusz Oleszak (FMSE/DCFM) Dariusz Oleszak,, Division of Construction and Functional Materials (FMSE/DCFM)Faculty of Materials Science and Engineering (FMSE)
Keywords in Polish
KOMPOZYTY O OSNOWIE METALICZNEJ
Abstract in Polish
urn:pw-repo:WUT1aaae09bb75b43b4b3d1625855f58de4