Author:
Khavari Mehrgan E.,Lange F. F.,Smith Paul,Marshall D. B.
Abstract
ABSTRACTContinuous ZrO2 precursor fibers were produced by dry spinning an aqueous zirconium acetate solution containing a soluble yttrium salt and a high molecular weight (MW = 5 × 106) polymer (PEO) to control rheology. A ZrO2-Y2O3 binary composition containing 3 mole % Y2O3 was chosen to control grain growth and to produce tetragonal ZrO2 subsequent to pyrolysis and heat treatment. Fine grained (< 0.3 μm), poly crystalline Zr(Y)O2fibers with diameters between 2 to 12 μm were produced by pyrolysis and heat treatment up to 1400 °C. Fiber tensile strength was measured as a function of processing variables. The objective was to relate flaw populations encountered during strength measurements to processing variables with the goal of controlling and increasing fiber strength.
Publisher
Springer Science and Business Media LLC
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