Plasma-sprayed alumina coatings mainly consist of γ-alumina with minor amounts of α-alumina due to incorporation of incompletely fused powder. The presence of amorphous materials has also been mentioned in the literature, but not quantified. In this work, X-ray powder diffraction and Rietveld refinements were explored as potential tools for the determination of the amorphous content in plasma sprayed alumina coatings. To cross-check the accuracy of the Rietveld analysis, standard additions of amorphous alumina were performed. Both approaches provided consistent results supporting the validity of the Rietveld method for routine quantification of the amorphous phase in plasma-sprayed alumina. For the as-sprayed coatings studied in the present work, the amount of amorphous alumina was found to be 12.0 ± 0.7 wt.%.

Quantitative determination of the amorphous phase in plasma sprayed alumina coatings using the Rietveld method / Gualtieri, Eva Magdalena; Gualtieri, Alessandro; Prudenziati, Maria. - In: SURFACE & COATINGS TECHNOLOGY. - ISSN 0257-8972. - STAMPA. - 201:(2006), pp. 2984-2989.

Quantitative determination of the amorphous phase in plasma sprayed alumina coatings using the Rietveld method

GUALTIERI, Eva Magdalena;GUALTIERI, Alessandro;PRUDENZIATI, Maria
2006

Abstract

Plasma-sprayed alumina coatings mainly consist of γ-alumina with minor amounts of α-alumina due to incorporation of incompletely fused powder. The presence of amorphous materials has also been mentioned in the literature, but not quantified. In this work, X-ray powder diffraction and Rietveld refinements were explored as potential tools for the determination of the amorphous content in plasma sprayed alumina coatings. To cross-check the accuracy of the Rietveld analysis, standard additions of amorphous alumina were performed. Both approaches provided consistent results supporting the validity of the Rietveld method for routine quantification of the amorphous phase in plasma-sprayed alumina. For the as-sprayed coatings studied in the present work, the amount of amorphous alumina was found to be 12.0 ± 0.7 wt.%.
201
2984
2989
Quantitative determination of the amorphous phase in plasma sprayed alumina coatings using the Rietveld method / Gualtieri, Eva Magdalena; Gualtieri, Alessandro; Prudenziati, Maria. - In: SURFACE & COATINGS TECHNOLOGY. - ISSN 0257-8972. - STAMPA. - 201:(2006), pp. 2984-2989.
Gualtieri, Eva Magdalena; Gualtieri, Alessandro; Prudenziati, Maria
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/584502
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