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- W2792540401 abstract "Abstract Y-Si-Al-O-N-F glasses with various Y/Al ratios were prepared by melt-quenching the liquid under high-pure N2 atmosphere inside a glove box. Nominal compositions of the oxynitride glasses in equivalent percent (equiv.%) are xY: (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 Y2Si2O7 at 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 Y2Si2O7 phase-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." @default.
- W2792540401 created "2018-03-29" @default.
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- W2792540401 date "2018-05-01" @default.
- W2792540401 modified "2023-10-17" @default.
- W2792540401 title "Effect of Y/Al ratio on crystallization, microstructures and mechanical properties of Y-Si-Al-O-N-F glass-ceramics" @default.
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- W2792540401 doi "https://doi.org/10.1016/j.ceramint.2018.02.004" @default.
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