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• W2127163615 abstract "espanolEl fin principal de este trabajo es la optimizacion de metodos ultrasonicos en la prueba no destructiva de azulejos sinterizados de porcelana que contienen defectos. Por lo tanto, bolas del nitruro de silicio, negros de carbon y PMMA (polimetilmetacrilato) fueron encajados en granulos del azulejo de porcelana antes de presionar para hacer defectos especiales en azulejos. Despues de sinterizado en 1220˚C, el tiempo de vuelo de las ondas ultrasonicas fue medido a traves del azulejo sinterizado de la porcelana. El tiempo del vuelo de ondas ultrasonicas fue medido por un transductor de contacto ultrasonico operando en modo eco-pulso. Este metodo puede permitir la deteccion de defectos usando escaneo-A. Los resultados de la prueba demostraron que la amplitud del pico recibido por partes defectuosas es mas pequeno que la parte que no tiene defectos. Dependiendo del tamano, de la forma y de la posicion del defecto. Su pico puede ser detectado. Ademas, un eco-pulse de inmersion de del metodo pulse-echo escaneo-C tambien fue utilizado para distinguir defectos en azulejos de porcelana. Usando esta tecnica es posible determinar el lugar y la forma de los defectos. Para apoyar resultados de la investigacion ultrasonica, una caracterizacion SEM tambien fue realizada. EnglishThe aim of this work is the optimization of ultrasonic methods in the non-destructive testing of sintered porcelain tiles containing defects. For this reason, a silicon nitride ball, carbon black and PMMA (Polymethylmethacrylate) were imbedded in porcelain tile granules before pressing to make special defects in tiles. After sintering at 1220˚C, the time of flight of the ultrasonic waves and ultrasonic signal amplitudes through the sintered porcelain tiles were measured by a contact ultrasonic transducer operating on pulse-echo mode. This method can allow for defect detection using the A-scan. The results of the test showed that the amplitude of the received peak for a defective part is smaller than for a part which has no defects. Depending on the size, shape and position of the defect, its peak can be detected. Additionally, an immersion pulse-echo C-scan method was also used to differentiate between defects in porcelain tiles. By using this technique, it is possible to determine the place and shape of defects. To support the results of the ultrasonic investigation, a SEM characterization was also made." @default.
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• W2127163615 date "2012-08-30" @default.
• W2127163615 modified "2023-09-23" @default.
• W2127163615 title "Ultrasonic characterization of defective porcelain tiles" @default.
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• W2127163615 doi "https://doi.org/10.3989/cyv.302012" @default.
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