Effects of the Injection Temperature of N₂ Gas on Pressureless Infiltration for Fabricating Al-Mg/Al₂O₃ Composites

다국어 초록 (Multilingual Abstract)

Pressureless infiltration of molten Al-Mg alloys into particulate Al2O3 preforms has been known to occur only in a nitrogen atmosphere. In order to understand the pressureless infiltration mechanism of Al-Mg alloys into particulate Al₂O₃ preforms, nitrogen was injected at 25℃
, 300℃, and 600℃. The higher the injection temperature of the nitrogen gas was, the lower the infiltration temperature of the molten Al-Mg alloys into the particulate Al₂O₃ preform was. Pressureless infiltration of the Al-6Mg alloy occurred at 700℃ when the nitrogen gas was injected at 600℃. The formation of an Mg-N compound (Mg₃N₂) on Al₂O₃ particles,
which improves wettability by decreasing the interfacial energy between the Al-Mg alloys and the Al₂O₃particles, enabled the formation of the Al-Mg alloy/Al₂O₃ composite via pressureless infiltration. Increasing the injection temperature close to the melting point of the Al-Mg alloys appeared to enhance the formation of Mg₃N₂ on the surface of the Al₂O₃ particles.

다국어 초록 (Multilingual Abstract)

Pressureless infiltration of molten Al-Mg alloys into particulate Al2O3 preforms has been known to occur only in a nitrogen atmosphere. In order to understand the pressureless infiltration mechanism of Al-Mg alloys into particulate Al₂O₃ preforms, nitrogen was injected at 25℃
, 300℃, and 600℃. The higher the injection temperature of the nitrogen gas was, the lower the infiltration temperature of the molten Al-Mg alloys into the particulate Al₂O₃ preform was. Pressureless infiltration of the Al-6Mg alloy occurred at 700℃ when the nitrogen gas was injected at 600℃. The formation of an Mg-N compound (Mg₃N₂) on Al₂O₃ particles,
which improves wettability by decreasing the interfacial energy between the Al-Mg alloys and the Al₂O₃particles, enabled the formation of the Al-Mg alloy/Al₂O₃ composite via pressureless infiltration. Increasing the injection temperature close to the melting point of the Al-Mg alloys appeared to enhance the formation of Mg₃N₂ on the surface of the Al₂O₃ particles.

참고문헌 (Reference)

1 Y. Pan, 359 (359): 2003

2 B. Srinivasa Rao, 16 (16): 2001

3 Y. Y. Chen, 31 (31): 1996

4 S. C. Tjong, 29 (29): 2000

5 M. Kobashi, 32 (32): 1997

6 K. Lemster, 33 (33): 2007

7 S. Skirl, 84 (84): 2001

8 B. S. Rao, 49 (49): 2001

9 Q. Dong, 58 (58): 920-, 2004

10 M. K. Aghajanian, 20 : 43-, 1989

11 A. Zulfia, 37 : 955-, 2002

12 K. B. Lee, 36 : 3179-, 2001

13 K. B. Lee, 37 : 1845-, 2002

14 C. H. Jin, 38 : 1640-, 2000

15 F. Delannay, 22 : 1-, 1987

16 M. K. Aghajanian, 26 : 447-, 1991

17 H. Akanda, 32 : 47-, 1997

18 Q. Hou, 195 : 121-, 1995

19 M. Rodriguez-Reyes, 57 : 2081-, 2003

20 W. Y. Jung, 27 : 51-, 1996

21 V. Laurent, 205 : 1-, 1996

22 C. A. Leon, 37 : 3509-, 2002

23 D. A. Weirauch, 21 : 1745-, 1990

24 G. H. Schiroky, 127 (127): 141-, 1997

25 I. Barin, "Thermochemical Data of Pure Substances" VCH 1989