Influence of Composition on Self-toughening and Oxidation Properties of Y-α-Sialons

doi:10.1016/j.jmst.2013.05.014

J. Mater. Sci. Technol.

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Influence of Composition on Self-toughening and Oxidation Properties of Y-α-Sialons

Chunfeng Liu¹⁾, Feng Ye¹⁾, Rongsen Xia¹⁾, Lei Zhang¹⁾, Yu Zhou¹⁾, Yudong Huang²⁾

1) Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
2) School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China

Received:2012-11-07 Revised:2012-12-29 Online:2013-10-30 Published:2013-10-16
Contact: C. Liu
Supported by:
National Natural Science Foundation of China (Nos. 50902029 and 51021002), Innovative Talents of Science and Technology Research Fund Project of Harbin (No. 2010RFQXG022), Development Program for Outstanding Young Teachers in Harbin Institute of Technology (No. HITQNJS.2009.024), China Postdoctoral Science Foundation (No. 20090450956).

Abstract

Abstract:

Y-α-sialon ceramics with different compositions were hot-press sintered. Varying the m or n value in the α-Sialon general formula, both the α-sialon grain morphology and phase assemblages present diversification, therefore, affecting the toughness and hardness. Meanwhile, varying the compositional parameters also influenced the composition and structure of the intergranular glass phase, as well as its oxidation behavior at 1100–1200 °C. The oxidation of the intergranular phase M′ in the Y-α-sialon ceramics was significantly enhanced with further rising the oxidation temperature to 1300 °C.

Key words: α-Sialon ceramics, Oxidation, Y₂O_3, Self-reinforcement

Chunfeng Liu, Feng Ye, Rongsen Xia, Lei Zhang, Yu Zhou, Yudong Huang. Influence of Composition on Self-toughening and Oxidation Properties of Y-α-Sialons[J]. J. Mater. Sci. Technol., DOI: 10.1016/j.jmst.2013.05.014.

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Influence of Composition on Self-toughening and Oxidation Properties of Y-α-Sialons

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