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dc.contributor.advisorSundaram, Paul A.
dc.contributor.authorRamos-Sáenz, Carlos R.
dc.description.abstractThe wear properties of oxidized and non-oxidized gamma-TiAl (a potential biomaterial) as well as Ti-6Al-4V and CP-Ti disks were studied and characterized by means of standard wear tests using a Bone pin arrangement. The Ti-base disks were oxidized in air at 500°C and 800°C for one hour. The tribological properties of the oxides formed over the disks were studied using a linear reciprocating wear testing machine under simulated biological conditions. Loss of metal oxide and coefficient of friction values were determined from the wear testing. From the results, abrasion, adhesion and tribomechanical fretting were defined as the primary wear mechanisms of the three alloys and the bone. The contact area of the disks was increased, thus reducing the oxide fracture and removal of material from their surfaces. Specifically, the oxide formed on gamma-TiAl possessed the highest wear resistance of the three materials which were studied. Also, as expected, bone wears down faster than the metal oxide.en_US
dc.description.abstractLa resistencia al desgaste de gamma-TiAl (un potencial biomaterial) oxidado y sin oxidar, como también la de Ti-6Al-4V y Titanio Comercialmente Puro fueron estudiadas y caracterizadas mediante pruebas estándar de desgaste utilizando un arreglo de hueso. Los discos de titanio fueron oxidados en aire a 500°C y 800°C por una hora. Las propiedades tribológicas del oxido formado sobre los discos fue estudiada utilizando una maquina de pruebas de desgaste lineal y reciproca bajo condiciones biológicas simuladas. De las pruebas de desgaste se determino la cantidad de metal removido y los valores de coeficiente de fricción de los óxidos estudiados. De los resultados, abrasión, adhesión y desgaste tribomecánico fueron definidos como los mecanismos de desgaste principales de los tres materiales y el hueso. El área de contacto de los discos aumento, reduciendo así que se fracturara el oxido generado y minimizando la cantidad de material removido de las superficies después de las pruebas. Específicamente, el oxido generado en gamma-TiAl poseía la mayor resistencia al desgaste de los tres materiales estudiados. También como esperado, el hueso se desgasto antes que el oxido de metal.en_US
dc.description.sponsorshipMBRS Score Program and the grant SO6GM-08103 from National Institute of General Medical Sciences (NIGMS).en_US
dc.subject.lcshFretting corrosionen_US
dc.subject.lcshTitanium dioxideen_US
dc.titleDevelopment and characterization of oxide scaffolds on gamma-TiAI surfaces to enhance osseointegrationen_US
dc.rights.licenseAll rights reserveden_US
dc.rights.holder(c) 2009 Carlos R. Ramos Sáenzen_US
dc.contributor.committeeCaceres, Pablo
dc.contributor.committeeBanerjee, Jayanta
dc.contributor.representativeBeauchamp, Gerson Engineeringen_US
dc.contributor.collegeCollege of Engineeringen_US
dc.contributor.departmentDepartment of Mechanical Engineeringen_US

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    Items included under this collection are theses, dissertations, and project reports submitted as a requirement for completing a graduate degree at UPR-Mayagüez.

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