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Fine‐grained polycrystalline zirconia fibers have been formed from an acetate precursor. The fibers contained a Y 2 O 3 additive, which inhibited grain growth (grain size ≤0.5 μm) and allowed the tetragonal phase to be retained at room temperature. Fibers with diameters in the range 2 to 5 μm had strengths in the range 1.5 to 2.6 GPa.
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Marshall et al. (1987) studied this question.
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