论文标题
在多能辐射下阐明GD2ZR2O7废物的降解机制
Elucidating the Degradation Mechanism of Gd2Zr2O7 Waste Form under Multi-Energy He Ion Irradiation
论文作者
论文摘要
我们研究了在多能辐照下，研究了GD2ZR2O7废物形式的微观结构和氦气冒泡演变（50 wt％）。发现GD2ZR2O7废物形式的三个结构异质区域是从He射线表面深度的函数。具体而言，在深度低于He辐照的表面（I区）GD2ZR2O7废物形式的深度小于40 nm处，完全是无定形的，具有大球形HE气泡（5-25 nm）。在中间区域，II区（40-800 nm）部分非晶的GD2ZR2O7废物形式伴随着带有带状的HE气泡，可能会导致微裂纹形成。在第三区的深度超过800 nm的区域中，结晶度不会影响。我们首次阐明了在100 dpa处被认为在结构上完整的GD2ZR2O7废物形式，在6.5 dpa下完全不适合，并具有协同的位移损害，电子能量损失，电子损失，并启用了他的浓度。这项研究导致了对非晶化的新物理见解，在多能HE辐射下，GD2ZR2O7废物的形成机制起泡形成机制，这对于耐辐射耐药陶瓷废物矩阵的设计和优化至关重要。
We studied the microstructural and helium bubbling evolutions of Gd2Zr2O7 waste form with immobilized TRPO (50 wt%) under multi-energy He ion irradiation. Three structurally heterogeneous regions for the Gd2Zr2O7 waste form were found as a function of the depth from the He-irradiated surface. Specifically, at a depth less than 40 nm below the He-irradiated surface (Region I) the Gd2Zr2O7 waste form is completely amorphous with large spherical He bubbles (5-25 nm). In the intermediate region, Region II, (40-800 nm) partially amorphized Gd2Zr2O7 waste form accompanied with ribbon-like He bubbles that may lead to the formation of microcracks is observed. The crystallinity is not impacted in Region III for a depth of more than 800 nm. For the first time, we elucidated that the Gd2Zr2O7 waste form, which was considered to be structurally intact at 100 dpa, is completely amorphized at 6.5 dpa with the synergistic displacement damage, electronic energy loss, and He concentration enabled. This study leads to new physical insights into amorphization and He bubbles formation mechanisms of Gd2Zr2O7 waste form under multi-energy He irradiation, which is essential for the design and optimization of irradiation-resistant ceramic waste matrices.
