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Indexed by:会议论文

Date of Publication:2008-01-01

Included Journals:EI、CPCI-S

Volume:368-372

Page Number:762-+

Key Words:zirconia-based nanocomposite; low-temperature sintering; superplasticity

Abstract:ZrO2 (3Y)-CaO-SiO2-TiO2 powders with excellent chemical homogeneity were synthesized by heating the alcohol-aqueous salt solutions. The powders have good dispersion, with particle size of 11 similar to 15nm and no hard agglomeration. The nanocomposite powders were hot-pressed in vacuum. The obtained zirconia-based multi-phase nanocomposites were characterized by using XRD and SEM, as well as relative density testing. The results demonstrated that, even though the sintering temperature was as low as 1250 degrees C, a high relative density of 97.5% was achieved. The superplastic compressive tests of the as-sintered specimens demonstrate that this material behaves good deformability at 1350 similar to 1500 degrees C, at which the maximum extrusion pressure is lower than 35MPa.