Effect of MgO-Y₂O₃ Additions on Microstructure and Mechanical Properties of Al₂O₃-TiCN Composites

Abstract:

The effect of MgO-Y₂O₃ additives on densification, microstructure and mechanical properties of hot-pressed Al₂O₃-TiCN composites was studied. The MgO-Y₂O₃ additions had little influence on densification of Al₂O₃-TiCN composites. The Al₂O₃-TiCN composites without additives had coarsening microstructure, whereas that containing 0.25wt%MgO-0.5wt%Y₂O₃ had a noticeable finer microstructure and good mechanical properties. The increase of fracture toughness were attributed to the addition of MgO and Y₂O₃ together with the TiCN particles to inhibit the abnormal grain growth of Al₂O₃.

• Periodical: Advanced Materials Research (Volume 1058)
• Pages: 176-179
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1058.176
• Online since: November 2014
• Authors: Zhi Lin Zhang, Wei Ming Guo, Shang Hua Wu, Yang You
• Keywords: Al₂O₃-TiCN, Mechanical Property, MgO, Microstructure, Y₂O₃

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