Effect of Y/Al ratio on crystallization, microstructures and mechanical properties of Y-Si-Al-O-N-F glass-ceramics
Effect of Y/Al ratio on crystallization, microstructures and mechanical properties of Y-Si-Al-O-N-F glass-ceramics
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Y/Al比对Y-Si-Al-O-N-F微晶玻璃结晶、显微组织和力学性能的影响
DOI:
10.1016/j.ceramint.2018.02.004
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发表时间:
2018-05
影响因子:
5.2
通讯作者:
Anxian Lu
中科院分区:
文献类型:
--
作者:
Zhiwei Luo;Jing Zhang;Yan Zhang;Jianlei Liu;Anxian Lu
Y-Si-Al-O-N-F glasses with various Y/Al ratios were prepared by melt-quenching the liquid under high-pure N2atmosphere inside a glove box. Nominal compositions of the oxynitride glasses in equivalent percent (equiv.%) arexY: (40-x)Al: 60Si: 86O: 12N: 2F (x = 10, 15, 20, 25, 30). X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to study the crystallization behaviors and microstructure evolution of the oxynitride glass-ceramics. XRD analysis of the Y-Si-Al-O-N-F glass-ceramics after adequate heat-treatment revealed that increasing Y/Al ratio led to increasingly higher contents of Y2Si2O7at the expense of the mullite crystal phase. In terms of mechanical properties, the elastic moduli of the oxynitride glass-ceramics were in the range from 107 to 152 GPa, while the bending strengths were 167–201 MPa. The micro-hardness of the glass-ceramics remained almost unchanged, varying from 8.4 to 8.9 GPa. The role of Y/Al ratio is that of altering the mullite and Y2Si2O7phase-transformation processes and influencing the final microstructures. Rod-like mullite crystals with high aspect-ratio are helpful to improve the mechanical properties of the oxynitride glass-ceramics. This work certainly has implications for other oxynitride glass-ceramics with high aspect-ratio morphologies.
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影响因子:
5.7
作者:
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通讯作者:
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影响因子:
5.2
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3.5
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5.2
作者:
G. Qu;Zhiwei Luo;Weizheng Liu;A. Lu
通讯作者:
G. Qu;Zhiwei Luo;Weizheng Liu;A. Lu
影响因子:
5.2
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通讯作者:
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