부산대학교 도서관

• Ultrafine W-Y 2 O 3 -ZrO 2 composites can be prepared through complex oxide particles. • By adjust the atomic ratio of Y:Zr to be 1:1, the complete formation of Y 2 Zr 2 O 7 complex oxide particles were achieved. • The dispersed and fine dispersion of Y 2 Zr 2 O 7 can effectively resistance grain growth and irradiation damage of tungsten. W-Y 2 O 3 -ZrO 2 composite materials were fabricated by a combination of wet chemical method and spark plasma sintering. We systematically studied the W-Y 2 O 3 -ZrO 2 composite materials at different Y and Zr doping atomic ratios. The ultrafine tungsten-based composites with a dispersed distribution of Y 2 Zr 2 O 7 particles can be prepared by appropriate Y and Zr doping atomic ratios for this experiment. The surface evolution behavior of W-5Y-5Zr composites induced by high temperature annealing and helium ion irradiation was investigated. The nano-Y 2 Zr 2 O 7 second-phase particles greatly increased the resistance of the material to grain growth. The dispersed and fine of Y 2 Zr 2 O 7 particles in the tungsten-based composites effectively improved the resistance to helium ion irradiation. These findings can serve as a reference for the fabrication of tungsten-based materials in fusion engineering. [ABSTRACT FROM AUTHOR]