TY - JOUR
T1 - Production of flaky Ti-based amorphous powder by a two-stage quenching technique and its thermal stability
AU - Nishiyama, Nobuyuki
AU - Oguchi, M.
AU - Inoue, A.
AU - Masumoto, T.
PY - 1994/5/1
Y1 - 1994/5/1
N2 - Amorphous Ti-based flaky powders about 2 μm thick were produced in a wide range of particle size from 25 to 150 μm using a two-stage quenching technique consisting of impact flattening supercooled liquid droplets obtained by high-pressure Ar atomization. The flaky powder particles have a smooth surface with a sharp edge and good metallic luster, and their corrosion resistance is much better than that of pure Ti metal and SUS 304. The aspect ratio is as large as 20-300. No appreciable difference in Tg and Tx is found between the flaky powder and melt-spun ribbon, while the heat of structural relaxation for the powder is 2.0-2.9 times as large as that for the ribbon. It is concluded that the flaky amorphous powder is produced at a much higher cooling rate than the ribbon because of the subsequent cooling of the supercooled liquid droplets.
AB - Amorphous Ti-based flaky powders about 2 μm thick were produced in a wide range of particle size from 25 to 150 μm using a two-stage quenching technique consisting of impact flattening supercooled liquid droplets obtained by high-pressure Ar atomization. The flaky powder particles have a smooth surface with a sharp edge and good metallic luster, and their corrosion resistance is much better than that of pure Ti metal and SUS 304. The aspect ratio is as large as 20-300. No appreciable difference in Tg and Tx is found between the flaky powder and melt-spun ribbon, while the heat of structural relaxation for the powder is 2.0-2.9 times as large as that for the ribbon. It is concluded that the flaky amorphous powder is produced at a much higher cooling rate than the ribbon because of the subsequent cooling of the supercooled liquid droplets.
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U2 - 10.1016/0921-5093(94)90295-X
DO - 10.1016/0921-5093(94)90295-X
M3 - Article
AN - SCOPUS:0028425816
SN - 0921-5093
VL - 179-180
SP - 697
EP - 701
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
IS - PART 1
ER -