Some features of sintering of tungsten powders

Andreiev, I. V.; Bondarenko, V. P.; Tarasenko, Lubov Georgyivna

doi:10.2298/sos1602191a

Cited by 4 publications

(2 citation statements)

References 5 publications

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“…J. Kurtz et.al. [10] in his own study also reported more shrinkage in case of W-Ni heavy alloy. Since tungsten has less self-diffusion, the presence of Ni in the W leads to the phenomenon called Oswald ripening which results in the high density of the W-Ni system.…”

Section: Results and Discussion 31 Effect On Densificationmentioning

confidence: 76%

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Activated sintering of Tungsten heavy alloy

et al. 2017

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In the present work, characterization of sintering behavior of Tungsten heavy alloy has been done through powder metallurgy route using Spark plasma sintering (SPS). Fine powder of Tungsten (<30 µm) was separately mixed with Ni, Co, Fe, Mo and Cu each with 1 weight%. Spark Plasma Sintering (SPS) technique (1200°C, 20 MPa pressure with 1 min holding time) was used to sinter the mixed powders. The maximum density was observed in W-Ni followed by Co, Fe, Cu, Mo and with least in pure tungsten sample. Optical microscopy as well SEM was done to determine the microstructure and grain coarsening. Due to the short heating time very less grain coarsening was observed. Vickers hardness test was conducted which resulted in maximum hardness in case if W-1Fe SPS sample.

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Section: Results and Discussion 31 Effect On Densificationmentioning

confidence: 76%

“…Sintering was done in a vacuum chamber and a constant pressure of 20 MPa was applied on the punches throughout the process. For all the composition, sintering was done at 1200°C [10]. The heat rate was controlled by an automatic heat controller with a set value of 1200°C/min.…”

Section: Sinteringmentioning

confidence: 99%