Comparative Analysis of the Properties of ZrO2–SiO2 and ZrO2–Al2O3–SiO2 Composition Fiber Composite Materials
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Strength, morphology, and phase composition are analyzed for a ceramic composite system based on fibers of tetragonal ZrO2 and a matrix with different content of SiO2 and Al2O3. It is shown that with an Al2O3 content from 0 to 20 wt.% there is formation of a precipitation-hardened structure and an increase in material ultimate strength in bending. The reduction in strength with a further increase in Al2O3 content is due to a deficiency in SiO2 binder and inadequate Al2O3 and mullite particle sintering with each other. Features of the structure and phase composition are demonstrated for a composite based on ZrO2 fibers with a different Al2O3:SiO2 ratio in the matrix.
Keywordsceramic composite materials (CCM) discrete ZrO2 fibers SiO2 matrix sol-gel precursor
Work was carried out within the scope of implementing comprehensive scientific area 14.3 “multifunctional heatproof and heat insulation materials” (1) within the scope of project No. 13-08-12110 ofi m with the Russian fund for fundamental research.
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