Abstract
Fe-aluminide and alumina reinforced in-situ aluminium based metal matrix composite was prepared by spark plasma sintering (SPS) of aluminium and nanosized Fe2O3 powder mixture. In-situ reinforcements were formed during SPS by exothermal reaction between aluminium and nano-size Fe2O3 particle. The thermal characteristics of the in-situ reaction were studied by differential scanning calorimetry (DSC). Field Emission Scanning Electron Microscopy (FESEM) along with the Energy Dispersive Spectroscopy (EDS) and X-ray diffraction (XRD) techniques were used to study the microstructural architecture of the composites as a function of SPS temperature and the volume fraction of reinforcement. Microhardness measurement of the composite shows significant increase in hardness with increase in SPS temperature and volume fraction of secondary phase.
Highlights
During the last two decades, metal matrix composites (MMC) have emerged as an important class of materials for structural, wear, thermal, transportation and electrical applications
This suggests that the in-situ reaction between nanometric iron oxide particles and molten aluminum is more favorable than the solid-state reaction due to better and intimate contact of Fe2O3 particles with molten Al
We conclude that the in-situ reaction between nanosize Fe2O3 and Al will lead to the evolution of Fealuminide particles in the Al matrix
Summary
During the last two decades, metal matrix composites (MMC) have emerged as an important class of materials for structural, wear, thermal, transportation and electrical applications. It has been reported that the properties of the MMCs are influenced to a great extent by the nature of the reinforcements and their distribution in the host metal matrix (Tjong & Ma, 2000; Everett, & Arsenault, 1991; Ibrahim, Mohamed, & Lavernia, 1991) These composites were prepared by powder metallurgy and diverse melting and casting routes (Chawla, 2012; El Baradie, 1990). The technique of reinforcing metal matrices by in-situ reaction has gained considerable attention (Kuruvilla, Prasad, Bhanuprasad, & Mahajan, 1990; Laksmi, Lu, & Gupta, 1998) In this technique, the reinforcing phase(s) is (are) formed in the host matrix via in-situ chemical reaction between the matrix and the precursor element(s)/compound(s) during the composite fabrication. The present investigation aims at developing a mechanically stiffer and stronger in-situ Al matrix composite containing finely dispersed Al2O3 and Fe-aluminide reinforcements by spark plasma sintering of Al powder and nanosized Fe2O3 powder
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
