Effect of Sintering Temperature on Microstructure and Property of Powder Metallurgy Al-24Si Alloy

DENG Zhenghua; ZHANG Cong; WANG Haibao; ZUO Duquan

doi:10.11973/jxgccl201907005

Materials and Mechanical Engineering > 2019 > 43(7): 20-23. > DOI: 10.11973/jxgccl201907005

DENG Zhenghua, ZHANG Cong, WANG Haibao, ZUO Duquan. Effect of Sintering Temperature on Microstructure and Property of Powder Metallurgy Al-24Si Alloy[J]. Materials and Mechanical Engineering, 2019, 43(7): 20-23. DOI: 10.11973/jxgccl201907005

Citation:

PDF (6916 KB)

Effect of Sintering Temperature on Microstructure and Property of Powder Metallurgy Al-24Si Alloy

1. School of Mechanical Engineering, Chongqing Three Gorges University, Chongqing 404000, China;
2. Chongqing Engineering Technology Research Center for Light Alloy and Processing, Chongqing Three Gorges University, Chongqing 404000, China;
3. Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China

More Information

Received Date: April 17, 2018
Revised Date: April 17, 2019

Graphical Abstract

Abstract

Abstract

Al-24Si alloy was prepared by powder metallurgy, and then the effects of sintering temperature (550-610℃) on microstructure, density and hardness of the alloy were studied. The results show that the microstructures of the alloy sintered at different temperatures all consisted of aluminum and silicon phases. When the sintering temperature reached 600℃ and above, Mn₄Al₁₆Si₃ phase was precipitated in the microstrucuture. When the sintering temperature was lower than 580℃, the gap amount between aluminum particles in the alloy microstructure decreased with increasing temperature, and therefore the density and hardness of the alloy were improved. When the sintering temperature reached 580℃, the eutectic liquid phase formed by aluminum and silicon penetrated into the interface between the aluminum particles, leaving large holes in the original location of the liquid phase, resulting in an increase in the porosity of the alloy and a decrease in the density and hardness. When the temperature reached 590℃, the eutectic liquid phase content increased and filled the inner pores, and therefore the density and hardness of the alloy increased.
- Al-24Si alloy,
- powder metallurgy,
- sintering temperature,
- density,
- hardness

FullText(HTML)

References (22)

References

[1]	李华基, 陈俊桃, 胡慧芳. 混合稀土和锶对Al-24%Si合金中共晶硅形貌的影响[J]. 机械工程材料, 2011, 35(3):22-24.
[2]	LV G, BAO Y, ZHANG Y F, et al. Effects of electromagnetic directional solidification conditions on the separation of primary silicon from Al-Si alloy with high Si content[J]. Materials Science in Semiconductor Processing, 2018, 81:139-148.
[3]	ARRIBAS I, MARTÍN J M, CASTRO F. The initial stage of liquid phase sintering for an Al-14Si-2.5Cu-0.5Mg (wt%) P/M alloy[J]. Materials Science and Engineering:A, 2010, 527(16/17):3949-3966.
[4]	李树索, 王德仁, 毛卫民, 等. Al-37%Si合金磷变质及电磁搅拌显微组织的研究[J]. 机械工程材料, 1998, 22(5):14-16.
[5]	刘萍. 稀土变质处理对过共晶Al-18%Si-Mg合金组织和性能的影响[J]. 机械工程材料, 2007, 31(5):36-40.
[6]	刘金萍, 郝安林, 熊翔,等. 粉末冶金法制备过共晶Al-23Si合金的微观组织与力学性能[J]. 粉末冶金材料科学与工程, 2014, 19(4):595-600.
[7]	XU F, GONG D. Improved the elevated temperature mechanical properties of Al-Si alloy deposited with Al-Si coating by magnetron sputtering[J]. Vacuum, 2018, 150:1-7.
[8]	黄培云.粉末冶金原理[M].北京:冶金工业出版社,1997:1-2.
[9]	曲选辉. 粉末冶金原理与工艺[M]. 北京:冶金工业出版社, 2013:1-3.
[10]	甘卫平, 陈招科, 杨伏良. 粉末粒度对高硅铝合金显微组织及性能的影响[J].中国有色金属学报,2005,15(5):721-726.
[11]	KIM J, JANG G S, KIM M S, et al. Microstructure and compressive deformation of hypereutectic Al-Si-Fe based P/M alloys fabricated by spark plasma sintering[J]. Transactions of Nonferrous Metals Society of China, 2014, 24(7):2346-2351.
[12]	李冰倩, 沈军, 曲寿江. 液相量对粉末冶金Al-Si-Cu-Mg合金的组织与性能的影响[J].金属功能材料,2015,22(1):32-37.
[13]	王宇鑫, 严鹏飞, 严彪. 过共晶铝硅合金的制备与性能研究[J]. 金属功能材料, 2010, 17(6):14-16.
[14]	SU S S, CHANG I T H, KUO W C H. Effects of processing conditions on the sintering response of hypereutectic Al-Si-Cu-Mg P/M alloys[J]. Materials Chemistry and Physics, 2013, 139(2/3):775-782.
[15]	杨伏良, 甘卫平, 陈招科, 等. 快速凝固/粉末冶金制备高硅铝合金材料的组织与力学性能[J]. 中国有色金属学报, 2004, 14(10):1717-1722.
[16]	柳培, 王爱琴, 郝世明,等. 高硅铝合金及颗粒增强铝基复合材料组织性能的探究[J]. 粉末冶金工业,2014,24(4):45-49.
[17]	杨培勇, 郑子樵, 蔡杨, 等. Si-Al电子封装材料粉末冶金制备工艺研究[J]. 稀有金属, 2004, 28(1):160-165.
[18]	李念奎, 凌杲, 聂波, 等. 铝合金材料及其热处理技术[M]. 北京:冶金工业出版社, 2012:65-67.
[19]	果世驹. 粉末烧结理论[M]. 北京:冶金工业出版社, 1998:93-96.
[20]	迟长志, 李世欣, 乔铁伟, 等. 粉末冶金铝硅合金及其磨损性能研究[J]. 热加工工艺, 2013, 42(6):24-26.
[21]	SUGIYAMA K, KAJI N, HIRAGA K. Re-refinement of α-(AlMnSi)[J]. Acta Crystallographica Section C, 1998, 54(4):445-447.
[22]	禹胜林, 薛松柏, 尹邦跃, 等. Al-Si电子封装材料粉末冶金法致密性研究[J]. 材料工程, 2014, 42(2):45-50.

Cited By

Get Citation

PDF

XML

Article views (2) PDF downloads (0)

Turn off MathJax

Article Contents

Abstract

References

Effect of Sintering Temperature on Microstructure and Property of Powder Metallurgy Al-24Si Alloy

Abstract

References

Catalog

Export File

Citation

Format

Content