Abstract

Cordierite (2MgO · 2Al2O3-SiO2), forsterite (2MgO · SiO2) and spinel (MgO · Al2O3) were rapidly solidified into a thick film through plasma spraying. The crystal structure of the assprayed deposits was examined using X-ray diffractometry and transmission electron microscopy, and shows that as-sprayed cordierite is amorphous, as-sprayed spinel is a crystalline phase, and as-sprayed forsterite is a mixture of amorphous and crystalline phases. Moreover, transmission electron microscopy reveals uniform amorphous cordierite, a nonuniform grainsize distribution of crystalline spinel and a twinned texture of as-sprayed forsterite.

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