Preparation of copper lead frame by powder metallurgy technique
คำสำคัญ:
Copper, sintered density, porosity and electrical conductivityบทคัดย่อ
Pure Cu is prepared with the dimension of 17.7 mm in diameter and 10 - 15 mm in height using powder metallurgical method to characterize its electrical and mechanical properties. These samples are compacted at a constant pressure of 280 MPa. Pure Cu pellets are sintered at 600°C and 950°C for 3, 4 and 7 hours. Before sintering, pure Cu pellet is subjected to SEM in order to check the compactness of the pellet, and also the grain structure of the Cu. All the pellets with different temperatures are re-weighed and sintered density are calculated after sintering. Besides that, porosity of the pellets is measured to analyze the closed packed particles stacking in the pellet. SEM and EDX of this pure Cu pellet have been captured to observe the presence of pores and agglomeration of particles in the sample. Pellets are also subjected to electrical conductivity measurement by comparing it to the commercial Cu lead frame in industry.Downloads
เอกสารอ้างอิง
London Metal Exchange, The World Centre For Non-Ferrous Metal Trading, 2003-2010, UK.
Budinski, K.G. and Budinski, M.K. (1999). Materials Properties and Selection (6th ed) : 526-527.
Chew, P.Y., Zahi, S., You, A.H., Lim, P.S. and Ng, M.C. (2010). Preparation of Cu and fly ash composite by powder metallurgy technique. AIP Conference Proceedings 1328 : 208-210.
Liu, D.B., Chen, M. F., Rauf, A., Cui, C.X. and Tan, J.J. (2008). Preparation and characterization of copper matrix composites by reaction sintering of the Cu–Mg–B system. J. Alloys Compd. 466 : 87-91.
Upadhyaya, A. and Upadhyaya, G. S. (1995). Sintering of Cu-Al2O3 composites through blending and mechanical alloying powder metallurgy routes. J. Mater. Des. 16(1) : 41-45.
Feng, Y., Zheng, H., Zhu, Z. and Zua, F. (2002). The microstructure and electrical conductivity of aluminum alloy foams. Mater. Chem. Phys.78 : 196-201.
Findik, F. and Uzun, H. (2003). Microstructure, hardness and electrical properties of silver based refractory contact materials. Mater. Des. 24 : 489–492.
Reed, J. S. (1995). Principles of Ceramics Processing. New York, NY: Wiley: 118-120.
Singh, K., Quazi, T., Upadhayay, S. and Sakharkar, P. (2005). Preparation and characterization of copper matrix composites by reaction sintering of the Cu–Mg–B system. J. Eng. Mater. Sci. 12 : 345-350.
Rahimiana, M., Ehsani, N., Parvin, N. and Baharvandi, H.R. (2009). The effect of particle size, sintering temperature and sintering time on the properties of Al– Al2O3 composites made by powder metallurgy. J. Mater. Process. Technol. 209 : 5387-5393.
Porter, D. A. and Easterling, K. E. (1980). Phase Transformations in Metals and Alloys. New York, NY :McGraw-Hill.
ดาวน์โหลด
เผยแพร่แล้ว
วิธีการอ้างอิง
ฉบับ
บท
การอนุญาต
ลิขสิทธิ์ (c) 2017 วารสารโลหะ, วัสดุ และแร่
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Authors who publish in this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.
