Al-Si-SiC 복합분말과 Al-Zn-Mg계 합금분말이 혼합된 분말의 소결 거동 및 기계적 특성연구
Investigation on the Sintering Behavior and Mechanical Properties of Al-Zn-Mg Alloy Powders Mixed with Al-Si-SiC Composite Powders
2
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
Al-Si-SiC composite powders with intra-granular SiC particles were prepared by a gas atomization process. The composite powders were mixed with Al-Zn-Mg alloy powders as a function of weight percent. Those mixture powderswere compacted with the pressure of 700 MPa and then sintered at the temperature of 565-585oC. T6 heat treatmentwas conducted to increase their mechanical properties by solid-solution precipitates. Each relative densityaccording to the optimized sintering temperature of those powders were determined as 96% at 580oC for Al-Zn-Mgpowders (composition A), 97.9% at 575oC for Al-Zn-Mg powders with 5 wt.% of Al-Si-SiC powders (composition B),and 98.2% at 570oC for Al-Zn-Mg powders with 10 wt.% of Al-Si-SiC powders (composition C), respectively. Eachhardness, tensile strength, and wear resistance test of those sintered samples was conducted. As the content of Al-Si-SiCpowders increased, both hardness and tensile strength were decreased. However, wear resistance was increased by theincrease of Al-Si-SiC powders. From these results, it was confirmed that Al-Si-SiC/Al-Zn-Mg composite could behighly densified by the sintering process, and thus the composite could have high wear resistance and tensile strengthwhen the content of Al-Si-SiC composite powders were optimized.
Abstract
Al-Si-SiC composite powders with intra-granular SiC particles were prepared by a gas atomization process. The composite powders were mixed with Al-Zn-Mg alloy powders as a function of weight percent. Those mixture powderswere compacted with the pressure of 700 MPa and then sintered at the temperature of 565-585oC. T6 heat treatmentwas conducted to increase their mechanical properties by solid-solution precipitates. Each relative densityaccording to the optimized sintering temperature of those powders were determined as 96% at 580oC for Al-Zn-Mgpowders (composition A), 97.9% at 575oC for Al-Zn-Mg powders with 5 wt.% of Al-Si-SiC powders (composition B),and 98.2% at 570oC for Al-Zn-Mg powders with 10 wt.% of Al-Si-SiC powders (composition C), respectively. Eachhardness, tensile strength, and wear resistance test of those sintered samples was conducted. As the content of Al-Si-SiCpowders increased, both hardness and tensile strength were decreased. However, wear resistance was increased by theincrease of Al-Si-SiC powders. From these results, it was confirmed that Al-Si-SiC/Al-Zn-Mg composite could behighly densified by the sintering process, and thus the composite could have high wear resistance and tensile strengthwhen the content of Al-Si-SiC composite powders were optimized.
참고문헌 (14)
- R. M. German, "Powder Metallurgy of Iron and Steel", pp.29~ (1997), John Wiley and Sons
- A. D. Romin. Jr, "Powder Metal and Technologies and Applications", pp.751~ (1998), ASM International
- S. H. Hong, , Mater. Sci. Eng. A, 194, pp.165~ (1995)
- B. G. Kim, , Mater. Chem. Phys., 72, pp.42~ (2001)
- J. M. Martín, , J. Mater. Process. Technol., 143-144, pp.814~ (2003)
- A. Dudhmande, , Eur. Powder Matall. Assoc., 2, pp.293~ (2005)
- H. P. Degischer, , Compos. Part A, 32, pp.1161~ (2001)
- J. R. Pickens, , J. Mater. Sci., 16, pp.1437~ (1981)
- M. Hull, , Powder Metall., 40, pp.103~ (1997)
- R. Zhang, , J. Am. Ceram. Soc., 86, pp.1446~ (2003)
- R. Zhang, , L. Gao and J. K. Guo : Ceram. Int, 30, pp.401~ (2004)
- H. Rudianto, , Int. J. Mod. Phys., 6, pp.628~ (2012)
- M. Song, , J. Mater. Sci., 43, pp.5265~ (2008)
- 김기봉, "Fe-Cr-Mo 합금 분말의 성형 및 소결특성에 미치는 입도분포 영향", 한국분말야금학회지, 20(1), pp.7~12 (2013), 한국분말야금학회