Functionally Graded Materials Ta10W-YSZ were prepared by SPS. The obtained results demonstrated that the existence of gradient layers significantly reduced thermal stress and changed stress distribution according to thermal stress analysis. The relative density of FGM Ta10W-YSZ was 98.1% with fine grains after sintering for 10 min at 1300 °C. Ta10W completely soluble and YSZ with larger grains would be prepared by SPS at 1600 °C, and Ta10W-YSZ was asynchronous densified. During ablation, the temperature of YSZ side was above 2200 °C, while that of Ta10W was keeping at 480 °C. After 3 min ablation, there was not any ablation pits or cracks on YSZ side. EDS results of Ta10W below YSZ layer showed that the oxidation contents did not obviously changed after ablation. In order to reduce thermal stress between two adjacent layers, it would be better that the gradient in FGMs should be linearly changed in volume percentage gradient.

功能分级材料Ta10W-YSZ由SPS制备。所得结果表明，根据热应力分析，梯度层的存在显着降低了热应力并改变了应力分布。FGM Ta10W-YSZ的相对密度为98.1％，在1300°C烧结10分钟后具有细晶粒。通过1600°C的SPS可以制备完全溶解的Ta10W和具有较大晶粒的YSZ，并对Ta10W-YSZ进行异步致密化。在烧蚀过程中，YSZ侧的温度高于2200°C，而Ta10W的温度保持在480°C。消融3分钟后，YSZ侧没有任何消融点或裂纹。在YSZ层以下的Ta10W的EDS结果表明，烧蚀后氧化含量没有明显变化。为了减少两个相邻层之间的热应力，