Synthesis and performance of Ca-α/β-SiAlON composites from tailings
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- 作者：Hong-shun Hao (1) (2)
Yang Yang (1) (2)
Fang Lian (3)
Wen-yuan Gao (1) (2)
Gui-shan Liu (1) (2)
Zhi-qiang Hu (1) (2) - 关键词：ceramic materials ; composite materials ; tailings ; mechanical properties ; microstructure ; sintering
- 刊名：International Journal of Minerals, Metallurgy, and Materials
- 出版年：2014
- 出版时间：May 2014
- 年：2014
- 卷：21
- 期：5
- 页码：515-522
- 全文大小：
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Yang Yang (1) (2)
Fang Lian (3)
Wen-yuan Gao (1) (2)
Gui-shan Liu (1) (2)
Zhi-qiang Hu (1) (2)
1. Institute of New Energy Materials, Dalian Polytechnic University, Dalian, 116034, China
2. Liaoning Provincial Key Laboratory of New Materials and Material Modification, Dalian Polytechnic University, Dalian, 116034, China
3. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China - ISSN：1869-103X
文摘
Ca-α/β-SiAlON composites were prepared using Ca-α/β-SiAlON powder synthesized from gold ore tailings, which contained abundant Si and Al elements as the major raw materials together with minor additives, through a pressure-less sintering method. The influences of sintering temperature on the phase composition and microstructure of the composites were analyzed. The scanning electron microscopy images of the composites show the interlacing of grains with elongated columnar, short columnar and plate-like morphologies. The composites sintered at 1520°C for 6 h have a flexural strength of 352 MPa, Vickers hardness of 11.2 GPa, and fracture toughness of 4.8 MPa·m1/2. The relative content of each phase in the products is I(Ca-α-SiAlON):I(β-SiAlON):I(Fe3Si) = 23:74:3, where I i stands for the diffraction peak intensity of phase i.