Abstract The fracture of micro-cantilever Al 2 O 3 specimens containing single grain boundaries is quantified via in situ bending experiments performed in the transmission electron microscope. The type of grain boundary complexion plays a dominant role in determining the fracture response, while the dopant chemistry has a secondary effect for the same complexion type. More ‘ordered’ complexions, those containing sub-monolayer adsorbates, are tougher than the undoped material. The behaviors of SiO 2 and Y 2 O 3 doped Al 2 O 3 with different complexions are compared and contrasted. In general, grain boundaries exhibiting more ‘disordered’ complexions types, those with multilayer adsorbates, are embrittled relative to undoped Al 2 O 3 .

中文翻译：

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掺杂剂和络合转变对氧化铝晶界断裂的影响

摘要 通过在透射电子显微镜下进行的原位弯曲实验，对含有单晶界的微悬臂Al 2 O 3 试样的断裂进行了量化。晶界颜色的类型在决定断裂响应中起主导作用，而掺杂化学对相同的颜色类型具有次要影响。更“有序”的肤色，包含亚单层吸附物的，比未掺杂的材料更坚韧。比较和对比了SiO 2 和Y 2 O 3 掺杂不同配位Al 2 O 3 的行为。一般而言，相对于未掺杂的 Al 2 O 3 ，显示出更多“无序”络合物类型的晶界，即具有多层吸附物的晶界是脆化的。