Browsing by Author "Carrizo, Patricia"

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    An exploration of historic metals in South America
    (2021-03-03) Carrizo, Patricia
    A study of metal artifacts from the Mendoza region of Argentina reveals the influences of native migration and European conquest.
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    Archaeometallurgical study of Argentinian railway parts
    (2023-05-01) Carrizo, Patricia
    Analysis of two historical railway parts reveals the techniques and treatments used on these metals that helped them endure centuries of use
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    Archaeometallurgical and Comparative Study of Material characterization and qualities of two profles of historical Argentine railways of diferent gauges and their fixing elements
    (2023-03-10) Carrizo, Patricia
    In the historical railway issue, few studies have been carried out, both nationally and internationally, to investigate the quality of railway material such as rails and fxings. The historical pieces of this research applied to the study of qualities of railway rail profles are two Vignole type rails: one is the P50 wide gauge rail (1520 mm of Russian origin) that is part of the Godoy Cruz Railway Museum (Mendoza province) and the other is a narrow gauge rail (750 mm) that belongs to the Museum of the Old Patagonian Express “La Trochita” (Chubut province), and they were donated for this research. It is proposed to make a comparison of these railway and historical elements in terms of raw material, hardness, chemical composition by means of argon plasma spectrometer, analysis of macrographs and microstructures by means of binocular stereomicroscope and metallographic microscope, respectively. Through the study of these railway rails, it is possible to know the characteristics of the quality of the material, rolling or forging lines, sinks, blowholes, dendritic structures
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    Archaeometallurgical and numismatic studies of a 5-peseta silver coin from 1870
    (2024-01-01) Carrizo, Patricia
    This article describes a metallographic and SEM study of a Spanish silver coin. The study verified the coin's authenticity and determined its alloy composition. The investigation is an example of a unique archaeometallurgical collaboration between a university and a museum
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    Archaeometallurgical Study of Two Ancient Copper Coins
    (2022-04-01) Carrizo, Patricia
    A scientific study of two copper coins from 1851 and 1853 reveals well-preserved symbols of a growing, newly independent Chile nation.
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    Archaeometalurgical and manufacturing procedures. Studies of two ancient copper coins 1851 and 1853
    (2022-03-03) Carrizo, Patricia
    The coins presented in this study belong to the Republic of Chile, Independence stage, and their values are One cent (1851) and Half cent (1853). The 1851 coin belongs to a private collector and the 1853 coin was rescued from the archaeological site "Historical Fort May 25 Village" and is currently exhibited in the Narciso Sosa Morales Museum in front of the actual site. Numismatic studies support the observation of the relationship between money and nations. Coins are a material testimony of the identity of a people, of an era and of the monetary policies that have animated the economy. Engravers and craftsmen have shaped in metal many of the most significant characteristics of the history of a nation, as well as its artistic development. The rich iconographic heritage allows us to read the historical symbols of our societies and recognise the identity of young American nations following their Bicentennial celebration.
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    Extracto orujo de uva Malbec como inhibidor natural de la corrosión de materiales metálicos
    (2020-10-07) Carrizo, Patricia
    La corrosión es un proceso de deterioro o destrucción de metales que, aunque inevitable, es factible de ser controlado. Debido a la toxicidad de las sustancias tradicionalmente utilizadas como inhibidoras del proceso corrosivo, hay un creciente interés en explorar inhibidores eficientes, económicos y amigables con el medio ambiente. El objetivo de este trabajo es evaluar la eficiencia anticorrosiva del extracto de orujo de uva Malbec (Vitis vinífera) frente a la corrosión de acero SAE 1010 en medio cloruro de sodio. El extracto fue obtenido mediante 2 métodos de extracción y se seleccionó aquel de mayor contenido de fenoles totales con método de Folin-Ciccolteau y el de mayor capacidad antioxidante mediante (2,2-azino-bis-(3-etilbenzotiazolin-6-sulfonato de amonio) ABTS. Para evaluar la eficiencia anticorrosiva se realizaron la evaluación del potencial de corrosión y ensayos de polarización del sustrato en suspensión de extracto orujo de uva en NaCl. Como blancos se utilizaron soluciones de cloruro de sodio 0,5M, respectivamente. Los resultados obtenidos mostraron que la presencia de orujo puede inhibir la corrosión del acero SAE 1010 inmerso en ClNa al disminuir la velocidad de corrosión
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    Modelo para evaluar la resistencia a la cavitación en aceros austeníticos
    (Grupo IEMI. Universidad Tecnológica Nacional. Facultad Regional Mendoza, 2012-01-31) Bello Morte, Carlos; Carrizo, Patricia
    Dentro del Departamento de Electromecánica, FRM UTN existe una línea de I+D referida al estudio de los procesos asociados al daño por cavitación. Esta temática tiene relevancia en el ámbito del diseño y en las pautas de operación de las máquinas hidráulicas ya que las reparaciones debidas a este daño pueden ser muy costosas. El propósito de esta línea de I+D es determinar un nuevo modelo semi-empírico para la evaluación de materiales, que permita conocer su resistencia a la cavitación, dando lugar a mejores diseños de materiales resistentes a este fenómeno. Se denota como de vital importancia realizar transferencia de los conocimientos adquiridos esta investigación en cátedra Ciencia de los Materiales, ya que este trabajo tiene una gran relación con los capítulos de Materiales especialmente aceros y con los procesos de Corrosión que también forman parte de esa asignatura, además de la importancia de realizar investigación y transferencia.
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    Reverse engineering of ancient metals
    (Carrizo, Patricia, 2021-12-01) Carrizo, Patricia
    Discusses how reverse engineering can be used in the preservation of cultural heritage Covers preservation and reconstruction methods for ancient materials Provides a useful resource on archaeometallurgy for everyone from museum curators to field researchers on material science and academic teachers This book examines archaeometallurgy and the preservation of ancient materials for cultural heritage. Through understanding the internal structures of relevant ancient materials, their chemical composition, resistance, hardness, etc., their conservation can be more effectively addressed. Preserving cultural artifacts, such as those from border sites, funerary contexts (burials), railway lines, ceremonial sites and road infrastructure, is necessary to provide perspective to a culture's trajectory. This book addresses how Reverse Engineering can disseminate knowledge of a culture's heritage by offering technology that can help restore artifacts so they may be displayed and utilized as educational objects.