Iranian Journal of Materials Science and Engineering
Iran University of Science & Technology
Thu, Dec 26, 2024
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Volume 11, Issue 3 (september 2014)
IJMSE 2014, 11(3): 48-57 |
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Ahangarkani, Zangeneh-Madar, Abbaszadeh, Rahmani, Borgi. THE EFFECT OF COBALT ADDITIVE ON MICROSTRUCTURE AND PROPERTIES OF W-CU COMPOSITES PREPARED BY SINTERING AND INFILTRATION PROCESSES . IJMSE 2014; 11 (3) :48-57
URL: http://ijmse.iust.ac.ir/article-1-682-en.html
URL: http://ijmse.iust.ac.ir/article-1-682-en.html
Abstract: (24642 Views)
In the present paper, the influence of cobalt additive on the sintering/infiltration behavior of W-Cu composite
was studied. For this purpose, the mixed powders of tungsten and cobalt were compacted by CIP method and then
sintered at 1450, 1550 and 1600 °C in a hydrogen atmosphere. The sintered specimens at 1550 °C were subsequently
infiltrated with liquid copper at 1250 °C for 10, 60 and 120 min. The microstructure and composition of samples were
evaluated using SEM, EDS as well as XRD techniques. The density of the sintered samples was measured by
Archimedes method. Vickers indentation test was used to measurement hardness. It was found that sintering
mechanism of tungsten powder depends on temperature and cobalt additive content. Also, the best infiltration behavior
was observed in the samples with optimum cobalt value. In addition, it was found that the W-W contiguity as well as
dihedral angle decreases as cobalt increases. Density and hardness of infiltrated specimens are attained 16.28-16.79
g.cm-3 and 220-251 VHN, respectively.
Type of Study: Research Paper |
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