Abstract
A slip has been prepared from an alumina powder with the average particle size of 0.22μm and the purity of 99.99%. Compacts have been formed from the slip in the high speed centrifugal compaction process by a 8-12kG centrifugal force, and sintered in air at 1200-1250¼C for 2hr. The SEM observations on polished and thermally etched sections of the sintered compacts showed fine grain structures with no void. The sintering at 1220¼C has given a 3-point bending strength of 1160MPa (Weibull modulus : 20.5), an average particle size of 0.64μm, a relative density of 99.3%, and a Vickers hardness of 2100. An alumina having high levels of the purity and same characteristics as Hipped materials was obtained in the centrifugal process by only sintering a non-doped green compact in air. One of the reason for obtaining such an excellent property of sintered alumina may be due to complete removal of bubbles during compaction by the high centrifugal force.
| Original language | English |
|---|---|
| Pages (from-to) | 180-183 |
| Number of pages | 4 |
| Journal | journal of the japan society of powder and powder metallurgy |
| Volume | 41 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Feb 1 1994 |
| Externally published | Yes |
Fingerprint
ASJC Scopus subject areas
- Mechanical Engineering
- Metals and Alloys
- Industrial and Manufacturing Engineering
- Materials Chemistry
Cite this
High Speed Centrifugal Compaction and Low Temperature Sintering of Submicron Alumina Powder. / Tashima, Shunzo; Hashimoto, Shigeaki; Kuroki, Hidenori.
In: journal of the japan society of powder and powder metallurgy, Vol. 41, No. 2, 01.02.1994, p. 180-183.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - High Speed Centrifugal Compaction and Low Temperature Sintering of Submicron Alumina Powder
AU - Tashima, Shunzo
AU - Hashimoto, Shigeaki
AU - Kuroki, Hidenori
PY - 1994/2/1
Y1 - 1994/2/1
N2 - A slip has been prepared from an alumina powder with the average particle size of 0.22μm and the purity of 99.99%. Compacts have been formed from the slip in the high speed centrifugal compaction process by a 8-12kG centrifugal force, and sintered in air at 1200-1250¼C for 2hr. The SEM observations on polished and thermally etched sections of the sintered compacts showed fine grain structures with no void. The sintering at 1220¼C has given a 3-point bending strength of 1160MPa (Weibull modulus : 20.5), an average particle size of 0.64μm, a relative density of 99.3%, and a Vickers hardness of 2100. An alumina having high levels of the purity and same characteristics as Hipped materials was obtained in the centrifugal process by only sintering a non-doped green compact in air. One of the reason for obtaining such an excellent property of sintered alumina may be due to complete removal of bubbles during compaction by the high centrifugal force.
AB - A slip has been prepared from an alumina powder with the average particle size of 0.22μm and the purity of 99.99%. Compacts have been formed from the slip in the high speed centrifugal compaction process by a 8-12kG centrifugal force, and sintered in air at 1200-1250¼C for 2hr. The SEM observations on polished and thermally etched sections of the sintered compacts showed fine grain structures with no void. The sintering at 1220¼C has given a 3-point bending strength of 1160MPa (Weibull modulus : 20.5), an average particle size of 0.64μm, a relative density of 99.3%, and a Vickers hardness of 2100. An alumina having high levels of the purity and same characteristics as Hipped materials was obtained in the centrifugal process by only sintering a non-doped green compact in air. One of the reason for obtaining such an excellent property of sintered alumina may be due to complete removal of bubbles during compaction by the high centrifugal force.
UR - http://www.scopus.com/inward/record.url?scp=0028377226&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0028377226&partnerID=8YFLogxK
U2 - 10.2497/jjspm.41.180
DO - 10.2497/jjspm.41.180
M3 - Article
AN - SCOPUS:0028377226
VL - 41
SP - 180
EP - 183
JO - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
JF - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
SN - 0532-8799
IS - 2
ER -