Zirconium fluoride (ZrF4)-based glass preforms made by the rotational casting process were treated prior to fibre drawing to eliminate pre-existing defects. Emphasis was given to the removal of external defects by different surface preparation methods which include mechanical polishing, and chemical etching in 0.2m H3BO3 solution as well as microwave-assisted plasma fluorination. The strength of the fibres was measured using both bending and dynamic loading tests. Fluorine exposure increased the median tensile strength by an additional 20%. As expected, the Weibull distribution for bending tests was shifted to the higher strength range, and was generally a factor of two more than in the dynamic tensile measurements.
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Pureza, P.C., Klein, P.H., Roberts, W.I. et al. Influence of preform surface treatments on the strength of fluorozirconate fibres. J Mater Sci 26, 5149–5154 (1991). https://doi.org/10.1007/BF01143205
- Weibull Distribution
- Mechanical Polishing
- Strength Range