Study of wire fabrication of aluminum treated with diboride particles

dc.contributor.advisor Suárez, O. Marcelo Florián-Algarín, David J. College of Engineering en_US
dc.contributor.committee Quintero, Pedro
dc.contributor.committee Valentín, Ricky
dc.contributor.department Department of Mechanical Engineering en_US
dc.contributor.representative Hernández Rivera, Samuel P. 2018-03-26T15:51:28Z 2018-03-26T15:51:28Z 2014
dc.description.abstract The present thesis focuses on the fabrication of aluminum wires by adding XB2 nanoparticles into an aluminum matrix, where X is a transition metal: Nb, Mg and Zr. The incorporation of aluminum in the XB2 particles is normally a complex process due to lack of enough affinity between the components. Liquid aluminum has a high surface tension, combined with the unavoidable oxide layer that is formed externally on the diboride prevents proper contact between the particle and liquid aluminum at the fabrication temperatures. An alternative process is then needed for proper inoculation of Al with the diborides. Diboride nanoparticles were obtained by fragmentation in a high energy ball mill and then mechanically alloyed with pure aluminum powder to form nanocomposite pellets. High energy ball milling was selected as the key process to achieve appropriate mixing and homogenization between components. The XB2/Al pellets were then sintered in a reduced vacuum atmosphere in order to increase the homogenization of the pellets and enhance the strength of diboride/ aluminum interface. The pellets of XB2/Al were added into the molten aluminum and mixed. The treated melt was then poured into a cylindrical mold to produce cylindrical ingots, which were subsequently cold-rolled to obtain wires with 1 mm diameter with a cross area reduction of 91%. The wire specimens were mechanically characterized and their electrical resistivity was measured and compared with pure aluminum. The results obtained in this thesis clearly demonstrated the feasibility of improving the mechanical properties of the material without significantly affecting its electrical resistivity of the wires. en_US
dc.description.graduationSemester Summer en_US
dc.description.graduationYear 2014 en_US
dc.description.sponsorship Nanotechnology Center (National Science Foundation grant HRD 0833112) en_US
dc.language.iso en en_US
dc.rights.holder (c) 2014 David Javier Florián Algarín en_US
dc.rights.license All rights reserved en_US
dc.subject Nanotechnology en_US
dc.subject Diboride particles en_US
dc.subject.lcsh Aluminum wire. en_US
dc.subject.lcsh Liquid aluminum -- Properties. en_US
dc.subject.lcsh Nanoparticles. en_US
dc.title Study of wire fabrication of aluminum treated with diboride particles en_US
dc.type Thesis en_US
dspace.entity.type Publication Mechanical Engineering en_US M.S. en_US
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