Properties assessment of nickel particulate-reinforced aluminum composites produced by hot pressing. (February 2016)

• Record Type: Journal Article
• Authors: Miranda, G; Carvalho, O; Soares, D; Silva, FS
• Is Part Of: Journal of composite materials. Volume 50:Number 4(2016)
• Page Start: 523
• Page End: 531
• Publication Date: 2016-02
• Subjects: Aluminum matrix composites -- nickel particle -- ultimate tensile strength -- ductility -- fractography -- interface; Composite materials -- Periodicals; Composites -- Périodiques; 620.118
• DOI: 10.1177/0021998315577148
• Languages: English
• ISSNs: 0021-9983

Abstract

Nickel particulate-reinforced aluminum-silicon composites, with 5, 12.5 and 20 wt%Nickel were produced by a hot pressing route. Microstructural characterization showed a uniform distribution of the Nickel particulates in the aluminum-silicon matrix. Ultimate tensile strength and hardness of the composites were found higher than for the aluminum-silicon alloy, while ductility suffered a decrease. Fracture surface analysis showed evidences of load transfer from the matrix to the reinforcement indicating the development of an effective interfacial bonding between Nickel particulates and aluminum-silicon matrix. Energy dispersive spectrometer and X-ray diffraction analyses performed in the particle/matrix interface revealed that it was formed by Al3 Ni intermetallic. It was found that the amount of Al3 Ni intermetallic has a paramount influence in the composites properties.