Synthesis of W- Cu- Ag Nanopowders Produced by a Co-Precipitation Process

Abstract:

A homogeneous precipitation process was employed to prepare nanosized W-10%wtCu-10%wtAg powders using ammonium meta tungstate, copper nitrate and silver nitrate as precursors. The initial precipitates were obtained by reacting ammonium meta tungstate, copper nitrate and silver nitrate solutions under certain PH and temperature. In order to synthesis W-Cu-Ag composite powders, the initial precipitates washed, dried, and then calcined in air in order to prepare CuWO4-x, Ag2W4O13 and WO3 oxide powders for the next step reduction. The reduction was carried out in a hydrogen atmosphere to form the final W-Cu-Ag nanocomposite powders. The powders were characterized by X-ray diffraction (XRD) technique. The morphologies of the powders were observed by scanning electron microscopy (SEM).

• Periodical: Defect and Diffusion Forum (Volumes 312-315)
• Pages: 312-318
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.312-315.312
• Online since: April 2011
• Authors: Golnaz Taghavi, Hamid Reza Rezaie, Hekmat Razavizadeh
• Keywords: Co-Precipitation, Nanomaterial, W-Cu-Ag Nanopowders

References

[1] Y. Li, X. Qu, Z. Zheng, C. Lei, Z. Zou, S. Yu: Int. J. Refract. Met. Hard. Mater. Vol. 21 (2003), p.259.

[2] E. Lassner, W. Schubert: Tungsten (New York: Kluwer Academic Publishers 1999).

[3] JR. Davis: Copper and copper alloys (ASM Specialty Handbook), (ASM International 2001).

[4] N. Zhao, J. Li, X. Yang: J. Mater. Sci. Vol. 39 (2004), p.4829.

[5] SH. Honga, BK. Kima, Z. A. Munir: Mater. Sci. Eng. Vol. 405 (2005) p.325.

[6] D. L. Houck, L. P. Dorfman and M. Paliwal: Proc. 7th Int. Tungsten Symp, Goslar, Germany, (September 1996), the International Tungsten Industry Association, 390.

[7] S.S. Ryu, Y.D. Kim, I.H. Moon: J. Alloys Compd Vol. 335 (2002) p.233.

[8] DG. Kim, GS. Kim, ST. Oh, YD. Kim: Mater. Lett. Vol. 58 (2004) p.578.

[9] IH. Moon, EP. Kim, G. Petzow: Powder Metall. Vol. 41 (1998), p.51.

[10] J. Cheng, Ch. Lei, E. Xiong, Y. Jiang, Y. Xia: J. Alloys Comp. Vol. 421 (2006), p.146.

[11] SH. Hong, BK. Kim: Mater. Lett. Vol. 57 (2003), p.2761.

[12] JC. Kim, IH. Moon: Nanostruct. Mater. Vol. 10 (1998), p.283.

[13] DG. Kim, BK. Lee, ST. Oh, DK. Young, SG. Kang: Mater. Sci. Eng. Vol. 395A (2005), p.333.

[14] J. Cheng, P. Song, Y. Gong, Y. Cai, Y. Xia: Mater. Sci. Eng. Vol. 488A (2008), p.453.

[15] ES. Yoon, JS. Lee, ST. Oh, BK. Kim: Int. J. Refract. Met. Hard. Mater. Vol. 20 (2002), p.201.

[16] M. Ardestani, HR. Rezaie, H. Arabi, H. Razavizadeh: Int. J. Refract. Met. Hard. Mater. Vol. 27 (2009), p.862.

[17] J. F. Li: J. Guangxi Metall. Vol. 1 (1991), p.39.

[18] L. Pauling: General chemistry. 3rd edition. (Dover Publications 1988).

[19] TH. Kim, JH. Yu, JS. Lee: Nanostruct. Mater. Vol. 9 (1997), p.213.

[20] M. Ardestani, H. Arabi, H. Razavizadeh, H.R. Rezaie, B. Jankovic, S. Mentus: Int. J. Refract. Met. Hard. Mater. (2010), in press.

[21] JY. Kim, Jose, A. Rodriguez, C. Jonathan Hanson, AI. Frenkel, PL. Lee: J. Am. Chem. Soc. Vol. 125 (2003), p.10684.

[22] DG. Kim, HM. Kyung, SY. Chang, ST. Oh, CH. Lee, YD. Kim: Mater. Sci. Eng. Vol. 399A (2005), p.326.

[23] GS. Kim, YJ. Lee, DG. Kim, ST. Oh, DS. Kim, YD. Kim: J. Alloys Comp. Vol. 419 (2006), p.262.

[24] M. Hashempour, H. Razavizadeh, HR. Rezaie, MT. Salehi: Mater. Charact. Vol. 60 (2009), p.1232.

[25] DG. Kim, ST. Oh, H. J, CH. Lee, YD. Kim: J. Alloys Comp. Vol. 354 (2003), p.239.

[26] D.E. Jech, J.L. Sepulveda and A.B. Traversone: Process for making improved copper/tungsten composites, US patent no. 5686676, (1997).