Abstract
Hexane was added as a process control agent to reduce powder agglomeration during milling. The as-milled powders were characterized using X-ray diffraction, differential scanning calorimetry, scanning electron microscopy and transmission electron microscopy. During milling, the hexane is partially dissociated, with the free carbon and hydrogen incorporated within the TixAl1 − x alloy powders in increasing amounts with increasing milling time.
The amount of incorporated carbon increases with the initial Ti content of the powder mixture, reaching a maximum of 12 wt.% incorporated into an initial Ti0.8Al0.2 powder mixture after 100 h of milling. The hydrogen is found to combine with elemental Ti to form TiH2−x, with an initial Ti0.5Al0.5 powder mixture milled for 40 h incorporating 0.95 wt.% H. The milled (TixAl1 − x + C) powder mixtures form a large fraction of amorphous phase near x = 0.5.
Annealing of the as-milled powders incorporating dissolved carbon and hydrogen produced a mixture of Al2Ti4C2, TiC and TiAl.
| Original language | English |
|---|---|
| Pages (from-to) | 205-211 |
| Journal | Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing |
| Volume | 196 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 1995 |
| MoE publication type | A1 Journal article-refereed |
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Carbide and hydride formation during mechanical alloying of titanium and aluminium with hexane. / Keskinen, Jari; Pogany, Andrew; Rubin, James; Ruuskanen, Pekka.
In: Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, Vol. 196, No. 1-2, 1995, p. 205-211.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Carbide and hydride formation during mechanical alloying of titanium and aluminium with hexane
AU - Keskinen, Jari
AU - Pogany, Andrew
AU - Rubin, James
AU - Ruuskanen, Pekka
PY - 1995
Y1 - 1995
N2 - Mixtures of elemental titanium and aluminium powders of overall composition TixAl1+x (x = 0.02, 0.3, 0.4, 0.5, 0.6, 0.7, 0.75, 0.8) were mechanically alloyed in a planetary-type ball mill. Hexane was added as a process control agent to reduce powder agglomeration during milling. The as-milled powders were characterized using X-ray diffraction, differential scanning calorimetry, scanning electron microscopy and transmission electron microscopy. During milling, the hexane is partially dissociated, with the free carbon and hydrogen incorporated within the TixAl1 − x alloy powders in increasing amounts with increasing milling time. The amount of incorporated carbon increases with the initial Ti content of the powder mixture, reaching a maximum of 12 wt.% incorporated into an initial Ti0.8Al0.2 powder mixture after 100 h of milling. The hydrogen is found to combine with elemental Ti to form TiH2−x, with an initial Ti0.5Al0.5 powder mixture milled for 40 h incorporating 0.95 wt.% H. The milled (TixAl1 − x + C) powder mixtures form a large fraction of amorphous phase near x = 0.5. Annealing of the as-milled powders incorporating dissolved carbon and hydrogen produced a mixture of Al2Ti4C2, TiC and TiAl.
AB - Mixtures of elemental titanium and aluminium powders of overall composition TixAl1+x (x = 0.02, 0.3, 0.4, 0.5, 0.6, 0.7, 0.75, 0.8) were mechanically alloyed in a planetary-type ball mill. Hexane was added as a process control agent to reduce powder agglomeration during milling. The as-milled powders were characterized using X-ray diffraction, differential scanning calorimetry, scanning electron microscopy and transmission electron microscopy. During milling, the hexane is partially dissociated, with the free carbon and hydrogen incorporated within the TixAl1 − x alloy powders in increasing amounts with increasing milling time. The amount of incorporated carbon increases with the initial Ti content of the powder mixture, reaching a maximum of 12 wt.% incorporated into an initial Ti0.8Al0.2 powder mixture after 100 h of milling. The hydrogen is found to combine with elemental Ti to form TiH2−x, with an initial Ti0.5Al0.5 powder mixture milled for 40 h incorporating 0.95 wt.% H. The milled (TixAl1 − x + C) powder mixtures form a large fraction of amorphous phase near x = 0.5. Annealing of the as-milled powders incorporating dissolved carbon and hydrogen produced a mixture of Al2Ti4C2, TiC and TiAl.
U2 - 10.1016/0921-5093(94)09701-1
DO - 10.1016/0921-5093(94)09701-1
M3 - Article
VL - 196
SP - 205
EP - 211
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
IS - 1-2
ER -