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采用高分辨透射电镜(HRTEM)原位氧化的方法,研究了Zr-4合金腐蚀初期的行为,为认识Zr-4合金在氧化膜与金属基体界面的氧化行为提供参考。原位氧化实验结果显示ZrO_2的形核过程伴随着连续的晶格演化:ZrO_2形成前,氧原子不断固溶到α-Zr的晶格间隙中,形成若干不连续的富氧区,随着氧含量的增加,富氧区晶格之间产生较大应变促使晶格出现调制以及形成面心立方结构ZrO亚氧化物,亚氧化物由取向接近的畴结构组成,随着反应的继续晶格连续演变直到形成m-ZrO_2。
The in-situ oxidation of Zr-4 alloy was studied by high-resolution transmission electron microscopy (HRTEM) in-situ oxidation, which provided a reference for understanding the oxidation behavior of Zr-4 alloy at the interface between oxide film and metal matrix. In-situ oxidation experiments show that the nucleation process of ZrO_2 is accompanied by continuous lattice evolution. Before the formation of ZrO_2, the oxygen atoms are continuously dissolved in the interstitial spaces of α-Zr, forming several discontinuous oxygen- The larger the content, the larger the strain between the oxygen-rich region lattice and the lattice modulation and the formation of face-centered cubic ZrO suboxide. The suboxide is composed of domain structure with close orientation, Evolve until m-ZrO 2 is formed.