• influence of nano-zro2 additive on the bending strength and fracture toughness of fluoro-silicic mica glass–ceramics

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
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     fluoro-silicic mica glass–ceramics were prepared by a sintering process and different proportions of nano-zro2 particles (3y-tzp) were integrated during the process. bending strength and fracture toughness were evaluated using a three-point bending test and a vickers indenter, respectively. the bending strength and fracture toughness improved in significantly with the increase in the quantity of nano-zro2 additives. the highest bending strength of 324.3 ± 12.3 mpa and fracture toughness of 4.2 ± 0.11 mpa m1/2 were obtained with 30% (wt.) nano-zro2. good results were also obtained in morphological observations. the glass–ceramic is homogenous and the zro2 grains embed in the lamellar structures of the fluoro-silicic mica homogenously and completely and array well and compactly. on the fracture surface, both the transgranular fracture and the intergranular fracture can be observed clearly.

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