자기펄스 가압성형법에 의한 알루미나 나노분말의 치밀화 및 특성 평가
Densification of Al₂O₃ Nanopowder by Magnetic Pulsed Compaction and Their Properties
2
조회
0
다운로드
4
인용
0
참고문헌
키워드
초록
This article presents the challenges toward the successful consolidation of Al₂O₃ nanopowder usingmagnetic pulsed compaction (MPC). In this research the ultrafine-structured Al₂O₃ bulks have been fabricated bythe combined application of magnetic pulsed compaction (MPC) and subsequent sintering, and their propertieswere investigated. The obtained density of Al₂O₃ bulk prepared by the combined processes was increased withincreasing MPC pressure from 0.5 to 1.25 GPa. Relatively higher hardness and fracture toughness in the MPCedspecimen at 1.25 GPa were attributed to the retention of the nanostructure in the consolidated bulk without cracks.The higher fracture toughness could be attributed to the crack deflection by homogeneous distribution and theretention of nanostructure, regardless of the presence of porosities. In addition, the as consolidated Al₂O₃ bulk
Abstract
This article presents the challenges toward the successful consolidation of Al₂O₃ nanopowder usingmagnetic pulsed compaction (MPC). In this research the ultrafine-structured Al₂O₃ bulks have been fabricated bythe combined application of magnetic pulsed compaction (MPC) and subsequent sintering, and their propertieswere investigated. The obtained density of Al₂O₃ bulk prepared by the combined processes was increased withincreasing MPC pressure from 0.5 to 1.25 GPa. Relatively higher hardness and fracture toughness in the MPCedspecimen at 1.25 GPa were attributed to the retention of the nanostructure in the consolidated bulk without cracks.The higher fracture toughness could be attributed to the crack deflection by homogeneous distribution and theretention of nanostructure, regardless of the presence of porosities. In addition, the as consolidated Al₂O₃ bulk
참고문헌 (13)
- M. E. Washburn, "Bull", Am. Cer. Soc, 67(2), pp.356~ (1988)
- E. Doerre, "Alumina-Processing, Properties, and Applications" (1984), Springer-Verlag
- W. H. Rhodes, , J. Am. Ceram. Soc, 64, pp.19~ (1981)
- F. W. Dynys, , J. Am. Ceram. Soc, 67, pp.596~ (1984)
- J. Besson, , J. Am. Ceram. Soc, 75, pp.2165~ (1992)
- J. Xu, , J. Mech. Sci.Int, 34, pp.167~ (1992)
- K. R. Venkatachai, , J. Am. Ceram. Soc, 69, pp.499~ (1986)
- B. H. Rabin, , J. Am. Ceram. Soc, 73, pp.2156~ (1990)
- M. Ishiyama, "Powder Metallurgy World Congress", pp.931~ (1993), Kyoto, Japan
- R. A. Andrievski, "Intern", J. Powder Met, 30, pp.59~ (1994)
- H.W. Lee, , J. Kor. Ceram. Soc, 37, pp.1072~ (2000)
- W. Gitzen, "Am. Ceram. Soc. Pub", pp.43~ (1970), Columbus, OH
- Los Alamos National Laboratory, "D. H. Carter", ~, pp.Re LA-11577-MS (1989)