水素ガス中で作成されたTiH<SUB>2</SUB>超微粒子
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概要
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Ultrafine particles of TiH<SUB>2</SUB> are formed by the H<SUB>2</SUB> gas evaporation, the typical habit of which shows a dodecahedron. On the analysis of the habit, the growth of the particles is quite likely to be resulting from the martensitic transformation from the bcc structure to CaF<SUB>2</SUB> structure owing to the hydrogen absorption. The desorption of the H<SUB>2</SUB> from the TiH<SUB>2</SUB> particles by a heat treatment in a vacuum brings about the formation of hcp Ti particle, while the absorption of H<SUB>2</SUB> gas of Ti particles, in a hydrogen atmosphere, the formation of TiH<SUB>2</SUB> particles with CaF<SUB>2</SUB> structure. The formation of twins in a particle is always necessary for the transformations between TiH<SUB>2</SUB> and Ti.
- 日本結晶学会の論文