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- W2038440901 abstract "A natural ilmenite (FeTiO3) and aluminium powder have been mechanically milled together for 100 h in a laboratory ball mill. The as-milled powder and an unmilled powder of identical composition were annealed at up to 1200°C and examined by X-ray diffraction and differential thermal analysis (DTA). The unmilled sample showed aluminium melted prior to an exothermic reaction starting at ∼850°C. The milled powder showed no thermal activity, other than a reversible phase transition at 1067±4°C, indicating that reaction occurred within the mill. The products of both powders were the same, TiAl3, Fe4Al13 and Al2O3, although in the milled powder these phases were nanocrystalline until annealing caused crystallite growth. The thermal reaction seemed to occur in two stages, formation of TiAl3, Al2O3 and elemental iron followed by a slower, diffusion controlled reaction between the elemental iron and residual aluminium to form Fe4Al13. The reaction during milling was attributed to increased intermixing between the ilmenite and aluminium causing a change in the rate determining step from solid-state diffusion to another, unknown, controlling mechanism." @default.
- W2038440901 created "2016-06-24" @default.
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- W2038440901 date "1998-05-01" @default.
- W2038440901 modified "2023-09-27" @default.
- W2038440901 title "Mechanochemical reaction between ilmenite (FeTiO3) and aluminium" @default.
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- W2038440901 doi "https://doi.org/10.1016/s0925-8388(98)00123-6" @default.
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