Study of process parameters in conventional powder metallurgy of silver


  • Suttha Amaranan National Metal and Materials Technology Center
  • Anchalee Manonukul National Metal and Materials Technology Center


Silver, Powder metallurgy, Compaction and sintering


Compaction, sintering and physical properties of silver powder were investigated. The silver powder was uniaxially compacted into a cylindrical specimen using compaction pressures of 13.79, 27.58, 41.37 and 55.16 MPa. Compacted parts were sintered at 700, 800 and 900°C in argon atmospheres. In addition, compacted parts were also sintered in vacuum at 900°C. For the sintering temperatures of 700 and 800°C, it was found that the sintered density increased as the compaction pressure increased below 40 MPa, while the sintered density decreased at a compaction pressure above 40 MPa. At the sintering temperature of 900°C, the sintered density decreased with increasing compaction pressure. The highest sintered density of 10.22 g⋅cm-3 (67.41 % relative density) was obtained at a temperature of 900°C under argon atmosphere for compaction pressure of 13.79 MPa. At this sintering temperature, vacuum sintering gave a slightly higher sintered density than argon atmosphere. Moreover, the difference in shrinkage of thickness and diameter of the sintered parts was observed. The diameter has higher shrinkage than the thickness. The weight of the specimen did not affect the sintered density, whereas the compaction pressure, sintering temperature and atmosphere influenced the sintered density.


Download data is not yet available.


Cubberly, W. H., Stedfeld, R. L., Mills, K., Davis, J. R., Refsnes, S. K., Sanders, B. R., Frissell, H. J. and Jenkins, D. M. 1984. ASM Hand Book of Powder Metallurgy: Production of Precious Metal Powders. ed. Glicksman, H. D. Vol. 7 : 147-151.

Eadie, R. L., Weatherly, G. C. and Aust, K. T. 1978. A study of sintering of spherical silver powder-I. The intermediate stage. Acta Metall. Mater. 26(5): 759-767.

German, R. M. 1994. Powder metallurgy science. Princeton, New Jersey: Metal Powder Industries Federation.

German, R. M. 1996. Sintering theory and practice. New York: Wiley.

Hirschhorn, J. S. and Berlunf, J. G. 1968. Effect of oxygen on the sintering rate of silver compacts. Scr. Metall. Mater. 2(6): 319-322.

Ji, C. H., Loh, N. H., Khor, K. A. and Tor, S. B. 2001. Sintering study of 316L stainless steel metal injection molding parts using taguchi method: final density. Mat. Sci. Eng. A-Struct 311(1-2): 74-82.

Lee, W. K., Eadie, R. L., Weatherly, G. C. and Aust, K. T. 1978. A study of sintering of spherical silver powder-II. The initial stage. Acta Metall. Mater. 26(12): 1837-1843.

Loh, N. H., Khor, K. A. and Tor, S. B. 1997. Metal injection molding of stainless steel 316L. In: The 2nd International Symposium on High Performance Metal Matrix Composites. 5-7 March, Tsukuba City: Mechanical Engineering Laboratory, Japan: 267-272.

Oliber, E. A., Cugno, C., Moreno, M., Esquivel, M., Haberkorn, N., Fiscina, J. E. and González Oliver, C. J. R. 2003. Sintering of porous silver compacts at controlled heating rates in oxygen or argon. Materia Revista 8(4): 350-357.

Tae, S. Y., You, H. L. and Sang, H. A. 2003. Effects of sintering conditions on the mechanical properties of metal injection molded 316L stainless steel. ISIJ Int. 43(1): 119-126.




How to Cite

S. Amaranan and A. Manonukul, “Study of process parameters in conventional powder metallurgy of silver”, J Met Mater Miner, vol. 20, no. 1, Apr. 2017.



Original Research Articles