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Published on: February 9, 2017
The Effects of Spark-Plasma Sintering (SPS) on the Microstructure and Mechanical Properties of BaTiO₃/3Y-TZP
Jing Li1, Bencang Cui2, Huining Wang3
1State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. ljing12@mails.tsinghua.edu.cn.
Abstract:
Composite ceramics BaTiO₃/3Y-TZP containing 0 mol %, 3 mol %, 5 mol %, 7 mol %, and 10 mol % BaTiO₃ have been prepared by conventional sintering and spark-plasma sintering (SPS), respectively. Analysis of the XRD patterns and Raman spectra reveal that the phase composition of t-ZrO₂, m-ZrO₂, and BaTiO₃ has been obtained. Our results indicate that SPS can be effective for the decrease in grain size and porosity compared with conventional sintering, which results in a lower concentration of m-ZrO₂ and residual stress. Therefore, the fracture toughness is enhanced by the BaTiO₃ phase through the SPS technique, while the behavior was impaired by the piezoelectric second phase through conventional sintering.
