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Self‐Combustion Reactions Induced by Mechanical Activation: Formation of Aluminum Nitride from Aluminum–Graphite Powder Mixture
Author(s) -
Tsuchida Takeshi,
Hasegawa Takeshi,
Inagaki Michio
Publication year - 1994
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1994.tb04574.x
Subject(s) - nitride , materials science , carbide , exothermic reaction , aluminium , graphite , ball mill , combustion , chemical engineering , metallurgy , powder mixture , x ray photoelectron spectroscopy , lattice constant , composite material , chemistry , sintering , organic chemistry , layer (electronics) , engineering , physics , optics , diffraction
The powders of aluminum metal and natural graphite mixed in various molar ratios (Al/C = 7/0–0/7) were ground in a planetary ball mill. When the mixtures thus activated mechanically were exposed to air, exothermic reactions spontaneously occurred in two successive steps, evolving red heat initially and then white heat. The main product was aluminum carbide in the first step and aluminum nitride as well as carbide in the second step. From the measurements of XPS spectra and the lattice constants, it was concluded that the aluminum nitride obtained is solid solution with the composition of (Al 2 OC) 1–x (AlN) x . The effects of mixing ratio of Al to C, grinding time, and gas atmosphere on the formation of aluminum nitride are discussed.