Effect of TiO2 doping on microstructural properties of Al2O3-based single crystal ceramics

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Atıf İçin Kopyala

Abali S.

JOURNAL OF CERAMIC PROCESSING RESEARCH, cilt.12, ss.21-25, 2011 (SCI İndekslerine Giren Dergi)

• Cilt numarası: 12 Konu: 1
• Basım Tarihi: 2011
• Dergi Adı: JOURNAL OF CERAMIC PROCESSING RESEARCH
• Sayfa Sayıları: ss.21-25

Özet

Powders of Al2O3-TiO2 containing, 48 and 40% TiO2 by weight were formed into single crystals with a Verneuil furnace at 2088 K. Raman spectroscopy was used to determine the phase composition of the samples solidified from the Al2O3-TiO2 powder. The resulting beta-Al2TiO5-Al6Ti2O13, beta-Al2TiO5-Al2O3 single crystals were probed with micro hardness assays, scratch test analyses, atomic force microscopy (AFM), scanning electron microscopy (SEM), thermal expansion and four-point bending tests. It was observed that the alumina-tialite single crystal retained a composition of Al2O3-TiO2 containing 60% Al2O3 by weight and displayed optimum properties.