7th IMRMPT

Abstract

Abstract information

English title:	High temperature infiltration behavior and reaction characteristics of Colima volcanic ashes on Gadolinium zirconate coatings deposited by atmospheric plasma spraying
Spanish title:	Comportamiento de infiltraci�n a alta temperatura y caracter�sticas de reacci�n de las cenizas volc�nicas de Colima sobre recubrimientos de zirconato de gadolinio depositados mediante rociado atmosf�rico por plasma
English abstract:	Thermal barrier coatings are severely affected by the infiltration of Si-rich molten airborne particles. In this work, the reaction products of infiltration experiments performed on free-standing gadolinium zirconate (Gd2Zr2O7, GZO) coatings deposited by atmospheric plasma spraying with molten ashes from the active Colima volcano at 1250 oC for 1, 5, and 10 h are presented and discussed. For coatings manufacture, commercial GZO powders, with an average particle size of 83 �m, were sprayed under the following conditions: stand a distance of 75 mm, 0.75 m/s in velocity, feeding rate of 30 g/min, 80 SCFH of hydrogen and 15 SCFH of argon as primary and secondary carrier gas flows, respectively. Characterization of the reaction products between the molten ash with GZO coatings was performed by scanning electron microscopy, chemical composition with EDS, grazing X-ray diffraction on grinded samples at different depths, as well as micro-Raman spectroscopy. Raman spectroscopy revealed that the bands for apatite and cubic zirconia, respectively, are present over the reaction layer, indicating that these phases recrystallize together. GZO coatings exposed to Colima volcanic ashes during 1, 5, and 10 h presented an infiltration depth of around 26.28, 30.23, and 37.90 �m, respectively. Phases were identified to comprehend the infiltration kinetic on these rare-earth zirconate-based coatings.
Spanish abstract:	Los recubrimientos de barrera t�rmica son seriamente afectados por la infiltraci�n de part�culas ricas en silicio fundidas. En este trabajo, se presentan y discuten los productos de reacci�n de experimentos de infiltraci�n en recubrimientos de zirconato de gadolinio (Gd2Zr2O7, GZO) depositados por rociado atmosf�rico por plasma con cenizas fundidas del volc�n Colima a 1250 �C durante 1, 5 y 10 h. Para la fabricaci�n de los recubrimientos, se pulverizaron polvos comerciales de GZO con un tama�o de part�cula promedio de 83 �m, bajo las siguientes condiciones: distancia de rociado de 75 mm, velocidad de 0,75 m/s, tasa de alimentaci�n de 30 g/min, 80 y 15 SCFH, hidrogeno y arg�n, de flujos de gas arrastre primario y secundario, respectivamente. La caracterizaci�n de los productos de reacci�n entre la ceniza fundida con los recubrimientos se realiz� mediante microscop�a electr�nica de barrido, composici�n qu�mica con EDS, difracci�n de rayos X en condiciones de incidencia rasante en muestras desbastadas a diferentes profundidades, as� como espectroscop�a micro-Raman. La espectroscop�a Raman revel� la presencia de bandas de apatita y la zirconia c�bica, respectivamente, las cuales est�n presentes la capa de reacci�n, lo que indica que estas fases se recristalizan simult�neamente. Los recubrimientos de GZO expuestos a cenizas volc�nicas de Colima durante 1, 5 y 10 h presentaron una profundidad de infiltraci�n de alrededor de 26.28, 30.23 y 37.90 �m, respectivamente. Adicionalmente, Se realizo la identificaci�n de las fases precipitadas con el fin de comprender la cin�tica de infiltraci�n de estos recubrimientos de zirconato de gadolinio.
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Authors

Name	Institution	Email
JUAN ZARATE-MEDINA	UNIVERSIDAD MICHOACAN DE SAN NICOLAS DE HIDALGO	jzarate@umich.mx
Ivan Felipe Bedoya Trujillo	Centro de Investigaci�n y de Estudios Avanzados del IPN	ivan.bedoya@cinvestav.mx
Jhon Sebastian P�rez Bedolla	Cinvestav	jhon.perez@cinvestav.mx
Marco Antonio Rivera Gil	Institute for Plastics and Advanced Materials, Advanced Technology Center	marco.rivera@ciateq.mx
Juan Mu�oz-Salda�a	Centro de Investigaci�n y de Estudios Avanzados del IPN	jmunoz@cinvestav.mx

Presentation

Room:	Principal Room
Date:	June 10, 2023
Hour:	09:40 - 10:00

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7^th IMRMPT
Seventh International Meeting for Researchers in Materials and Plasma Technology

Previous editions:

        1st IMRMPT 2011
        2nd IMRMPT 2013
        3rd IMRMPT 2015
        4th IMRMPT 2017
        5th IMRMPT 2019
        5+1 IMRMPT 2021

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