Properties of Cu-W Functionally Graded Materials Produced by Segregation and Infiltration


Article Preview

The Cu/W functionally graded material (FGM) was produced by vibration of W agglomerates in order to obtain the W skeleton with a gradient in porosity, which after pressureless sintering was infiltrated with molten Cu. Certain sintering mechanisms are suggested for these complex W structures. The segregation of two different sizes of W agglomerates was controlled by vibration time. Different vibration duration resulted in different types of microstructure: skeleton type microstructure after shorter vibration time and graded type microstructure after extended vibration times. The final Cu-infiltrated FGMs were characterized microstructurally and their electrical resistivity (r) was measured using the 4-probe technique. The values of r were in between those for pure W and Cu, depending strongly on the vibration times of the initial W agglomerates, and exhibiting particular r vs. T (K) behavior.



Materials Science Forum (Volumes 492-493)

Edited by:

Omer Van der Biest, Michael Gasik, Jozef Vleugels




D. Janković Ilić et al., "Properties of Cu-W Functionally Graded Materials Produced by Segregation and Infiltration ", Materials Science Forum, Vols. 492-493, pp. 123-128, 2005

Online since:

August 2005




[1] T. Rosato, K.J. Strandburg, F. Prinz, R.H. Swendsen: Phys. Rev. Lett. Vol. 58 (1987), p.1038.

[2] J.C. Williams: Powder Technol. Vol 16 (1976), p.245.

[3] G. Petzow, H.E. Exner: Z. Metallkunde Vol. 67 (1976), p.611.

[4] R. Jedamzik, A. Neubrand, J. Rödel: J. Materials Science Vol. 35 (2000), p.477.

[5] D.S. McLachlan, M. Blaszkiewicz, R.E. Newnahm: J. Am. Ceramic Society Vol 73 (1990), p.2187.

[6] J. Fiscina, M. Ohligschläger, F. Mücklich: J. Mat. Sci. Lett. Vol 22 (2003), p.1455.

[7] W.S. Young, I.B. Cutler: J. American Ceramic Society Vol. 53 (1969), p.659.

[8] J.E. Fiscina, C.J. R González-Oliver, D.A. Esparza: Applied Superconductivity Vol. 3/5 (1995), p.277.

[9] N.C. Kothar: Powder Metallurgy Vol. 7/14 (1964), p.251.

[10] R.M. German, Z.A. Munir: Metallurgical Transactions A Vol 7A (1976), p.1873.

[11] F. Thümmler , R. Oberacker: Powder Metallurgy (The Inst. of Materials, London, 1993), p.191.

[12] W.D. Kingery: J. Applied Physics Vol. 30 (1959), p.301.

[13] D. Janković Ilić, J. Fiscina, C.J.R. González-Oliver, F. Mücklich: submitted to J. Material Science under number JMS 11204-03.

[14] W.S. Wang, K.S. Hwang: Metallurgical and Materials Transactions A Vol. 29A (1998), p.1509.

[15] C. Scorey: U.S. Patent 5, 292, 478, Mar. 8, (1994).

Fetching data from Crossref.
This may take some time to load.