Abstract Spark plasma sintering (SPS) technique was used to densify 7 mol% yttria-stabilized zirconia (7YSZ) powder with Gd 2 O 3 -particles, at temperatures ranging between 1000 and 1200 °C. Fine dispersion of Gd 2 O 3 -particles into a full-densified matrix was achieved. Shrinkage and microstructure, as well as porosity were investigated. The fine Gd 2 O 3 -particles distributed into 7YSZ matrix have influence over the sintering consolidation and final microstructure. An increment in the spark plasma sintering temperature around 70 °C is detected when Gd 2 O 3 particles are present. The thermal characterization was performed using the photothermal infrared radiometry technique. Both thermal diffusivity and thermal conductivity display a similar sigmoidal (Boltzmann type) behavior with the Gd 2 O 3 concentration in the samples.

中文翻译：

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放电等离子体烧结7YSZ-Gd 2 O 3 陶瓷纳米复合材料的致密化和微观结构

摘要 使用火花等离子体烧结 (SPS) 技术在 1000 至 1200 °C 的温度范围内用 Gd 2 O 3 颗粒致密化 7 mol% 氧化钇稳定的氧化锆 (7YSZ) 粉末。实现了 Gd 2 O 3 粒子精细分散到完全致密的基质中。研究了收缩率和微观结构以及孔隙率。分布在 7YSZ 基体中的细小 Gd 2 O 3 颗粒对烧结固结和最终微观结构有影响。当存在 Gd 2 O 3 颗粒时，检测到放电等离子体烧结温度升高约 70°C。使用光热红外辐射测量技术进行热表征。热扩散率和热导率都显示出与样品中 Gd 2 O 3 浓度相似的 sigmoidal（玻尔兹曼型）行为。