Home Kovove Materialy-Metallic Materials 2014 Metallic Materials Vol. 52 (2014), no. 4, pp.183-188

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Metallic Materials Vol. 52 (2014), no. 4, pp.183-188

Title: Decomposition of silica binder during infiltration of Saffil fiber preform with Mg and Mg-Li melts
Author: S. KUDELA Jr., K. IŽDINSKÝ, S. OSWALD, P. RANACHOWSKI, Z. RANACHOWSKI, S. KÚDELA

Abstract: Mg and Mg-Li matrix composites were prepared by the melt infiltration of fibrous preform consisting of Saffil alumina fibers and the silica binder. During this process there has occurred decomposition of silica binder and/or surface silica film by displacement redox reactions and the reaction products were characterized using SEM, TEM, SAED, FTIR and XPS techniques. The only reaction products found in Mg infiltrated Saffil preform were MgO and Mg2Si. In Mg-Li melt infiltrated Saffil preform there was found besides MgO and Mg2Si also the non-crystalline phase that appears to be the lithium silicate xLi2O⋅ySiO2. Binary lithium silicides and ternary magnesium-lithium silicides were not detected.

Keywords: Mg-Li composites, Saffil fibers, silica binder, melt infiltration, XPS, FTIR
Year: 2014, Volume: 52, Issue: 4 Page From: 183, Page To: 188
doi:10.4149/km_2014_4_183


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