TY - JOUR
T1 - Microwave sintering
T2 - A new approach to fine-grain tungsten - II
AU - Jain, Mohit
AU - Skandan, Ganesh
AU - Martin, Krista
AU - Kapoor, Deepak
AU - Cho, Kyu
AU - Klotz, Bradley
AU - Dowding, Robert
AU - Agrawal, Dinesh
AU - Cheng, Jiping
PY - 2006/3
Y1 - 2006/3
N2 - While grain-growth inhibition in micrograined refractory metals and ceramics is well documented, a reduction in grain size to the nanoscale is relatively new. In the work reported here, nanocrystalline tungsten powders containing small amounts of HfO2 and Y2O3 as dopants were synthesized using a solution-synthesis technique. The assynthesized powders were then consolidated using microwave sintering. The effect of dopant concentration on the crystallite size, particle size, and grain size of the sintered material was monitored. Average grain sizes as low as 0.5 μm were achieved in doped microwave-sintered tungsten; this grain size is substantially smaller than previously reported, namely ∼2 μm in undoped tungsten. It was also observed that an optimum level of dopant exists for effective grain-growth inhibition, since the sintering of tungsten is hindered at higher dopant levels.
AB - While grain-growth inhibition in micrograined refractory metals and ceramics is well documented, a reduction in grain size to the nanoscale is relatively new. In the work reported here, nanocrystalline tungsten powders containing small amounts of HfO2 and Y2O3 as dopants were synthesized using a solution-synthesis technique. The assynthesized powders were then consolidated using microwave sintering. The effect of dopant concentration on the crystallite size, particle size, and grain size of the sintered material was monitored. Average grain sizes as low as 0.5 μm were achieved in doped microwave-sintered tungsten; this grain size is substantially smaller than previously reported, namely ∼2 μm in undoped tungsten. It was also observed that an optimum level of dopant exists for effective grain-growth inhibition, since the sintering of tungsten is hindered at higher dopant levels.
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M3 - Article
AN - SCOPUS:33646252022
SN - 0888-7462
VL - 42
SP - 53
EP - 57
JO - International Journal of Powder Metallurgy (Princeton, New Jersey)
JF - International Journal of Powder Metallurgy (Princeton, New Jersey)
IS - 2
ER -