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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Location of deuterium atoms absorbed in nanocrystalline graphite prepared by mechanical alloying
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Location of deuterium atoms absorbed in nanocrystalline graphite prepared by mechanical alloying

机译：机械合金化制备的纳米晶石墨中吸收的氘原子的位置

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摘要

Neutron diffraction is an important technique for studying the structure of hydride materials. H/D isotopic substitution was employed to observe the location of deuterium atoms in deuterated nano-graphite because the coherent scattering length of deuterium is large enough to be observed in comparison with that of the metal atoms forming hydrogen absorbing materials. The preparation of the nano-crystalline graphite and the absorption of deuterium atoms in the graphite were carried out simultaneously by mechanical alloying under D_2 gas atmosphere. The transformation from the hexagonal graphite as a starting material into amorphous-like carbon was observed by neutron diffraction. The conformation in the graphite was changed by the creation of dangling bonds and deuterium was absorbed by the solid-gas reaction when the milling proceeded. Two types of the deuterium coordinations were found in radial distribution function. RDF(r). One is the C-D covalent bond and the other is deuterium located between layers of the graphite.
机译：中子衍射是研究氢化物材料结构的重要技术。 H / D同位素取代用于观察氘原子在氘化纳米石墨中的位置，因为与形成氢吸收材料的金属原子相比，氘的相干散射长度足够大。纳米晶石墨的制备和石墨中氘原子的吸收是在D_2气氛下通过机械合金化同时进行的。通过中子衍射观察到从作为原料的六方石墨到无定形碳的转变。当进行研磨时，通过悬键的形成改变了石墨中的构象，并且氘被固-气反应吸收。在径向分布函数中发现了两种类型的氘配位。 RDF（r）。一个是C-D共价键，另一个是位于石墨层之间的氘。

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