钒在v4o附近间隙氧的长程有序

Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy Pub Date : 1973-04-05 DOI:10.1143/JPSJ.34.965

K. Hiraga, M. Hirabayashi

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引用次数: 20

摘要

用x射线和电子衍射测定了钒- 14-23在%氧条件下的间隙固溶体的晶体结构。结果表明，氧原子有规律地占据八面体间隙位，形成了一个以体心为中心的超晶格，其化学计量量约为v16o 3。该单元格包含一个4×4×2数组的b.c.t.金属亚单元的轴比大于单位。超晶格和亚晶格的尺寸都随着氧浓度的增加而增加。上层结构在400°C时形成，并在400°C以上转变为另一种b.c.t结构，其氧原子优先占位，如Fe-C马氏体。

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Long Range Ordering of Interstitial Oxygen in Vanadium near V 4 O

The crystal structure of interstitial solid solutions of vanadium with 14–23 at % oxygen has been determined by X-ray and electron diffraction. It is shown that the oxygen atoms occupy regularly the octahedral interstitial sites, forming a body-centered tetragonal superlattice of which the stoichiometry is approximately V 16 O 3 . The unit cell contains a 4×4×2 array of b.c.t. metal subcells with the axial ratio larger than unity. Both the cell dimensions of superlattice and sublattice increase of oxygen concentration. The superstructure is formed 400°C and transforms to another b.c.t. structure with preferential occupation of oxygen atoms like the Fe-C martensite above that temperature.

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Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy

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