Study of the Sintering of Mixtures Al₂O₃-Nb₂O₅ and Y₂O₃-Nb₂O₅

Abstract:

Al₂O₃-Nb₂O₅ has been widely explored as one of the most used material for sintering mixing in the literature, due to its excellent hardness properties, used in armor. In this study, Al₂O₃-Nb₂O₅ and Y₂O₃-Nb₂O₅ powders were prepared, with 50% in mole fraction of each oxide. The mixtures were subjected to high energy milling in an eccentric ball mill for 3 h, dried and sieved in a sieve vibrator. The green bodies were compacted at 70 MPa and sintered from 1250 to 1650 °C for 3 h, at 100 °C steps. The materials were characterized by quantitative X-Ray diffraction (XRD) using Rietveld method and by mass loss. The Al₂O₃-Nb₂O₅ mixtures experienced a weight loss of 84% at sintering temperatures of 1550 and 1650 °C.

• Periodical: Materials Science Forum (Volumes 727-728)
• Pages: 799-803
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.727-728.799
• Online since: August 2012
• Authors: Ricardo F. Cabral, Marcelo Henrique Prado da Silva, Jose B. de Campos, Eduardo Sousa Lima
• Keywords: Mass Loss, Rietveld, Sintering

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