Stacking Faults and Mechanisms Strain-Induced Transformations of hcp Metals (Ti, Mg) during Mechanical Activation in Liquid Hydrocarbons

Lubnin, A.N.; Dorofeev, G.A.; Nikonova, R.M.; Mukhgalin, V.V.; Lad’yanov, V.I.

Авторы: Lubnin A.N., Dorofeev G.A., Nikonova R.M., Mukhgalin V.V., Lad’yanov V.I.
Журнал: Physics of the Solid State
Том: 59
Номер: 11
Год издания: 2017
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 2226
Последняя страница: 2238
DOI: 10.1134/S1063783417110191
Аннотация: Abstract—The evolution of the structure and substructure of metals Ti and Mg with hexagonal close-packed (hcp) lattice is studied during their mechanical activation in a planetary ball mill in liquid hydrocarbons (toluene, n-heptane) and with additions of carbon materials (graphite, fullerite, nanotubes) by X-ray diffraction, scanning electron microscopy, and chemical analysis. The temperature behavior and hydrogen-accumulating properties of mechanocomposites are studied. During mechanical activation of Ti and Mg, liquid hydrocarbons decay, metastable nanocrystalline titanium carbohydride Ti(C,H)x and magnesium hydride β-MgH2 are formed, respectively. The Ti(C,H)x and MgH2 formation mechanisms during mechanical activation are deformation ones and are associated with stacking faults accumulation, and the formation of face-centered cubic (fcc) packing of atoms. Metastable Ti(C,H)x decays at a temperature of 550°C, the partial reverse transformation fcc → hcp occurs. The crystalline defect accumulation (nanograin boundaries, stacking faults), hydrocarbon destruction, and mechanocomposite formation leads to the enhancement of subsequent magnesium hydrogenation in the Sieverts reactor. DOI: 10.1134/S1063783417110191
Добавил в систему: Дорофеев Геннадий Алексеевич

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Stacking Faults and Mechanisms Strain-Induced Transformations of hcp Metals (Ti, Mg) during Mechanical Activation in Liquid Hydrocarbonsстатья

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