Study of Sintering Behavior of Ceramic Composite Al₂O₃-TiO₂ Rare Reinforcing with La₂O₃ Possible Application as Ceramic Cutting Tools

Abstract:

In this work, composite ceramic was produced to base Al₂O₃ reinforced with 35% weight TiO₂ and variation 0-2% La₂O₃, were evaluated properties to study their microstructural characteristic and mechanical properties as applicable cutting tools. The ceramic composites were produced by thermo-mechanical process. It was observed from the results of XRD after sintering no new phase is formed, besides the characteristics of the precursor oxides. According to the result of particle size analysis before and 24 hours after milling, there was a reduction of the average diameter of agglomerate 95.25% which is suitable to assist sintering of the composite, because this reduction increases the reaction rate the raw material during firing. At microdurezavickers test it was observed that the sample with 1.5% La₂O₃ showed better hardness results.

• Periodical: Materials Science Forum (Volume 820)
• Pages: 399-404
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.820.399
• Online since: June 2015
• Authors: Andrea G. de Sousa, R.A.S. Ferreira, Yogendra Prasad Yadava
• Keywords: Alumina, Ceramic Cutting Tool, Lanthanum Oxide, Titanium Oxide

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DOI: 10.22239/2317-269x.01933