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Spark Plasma Sintering of Sol–Gel Derived Amorphous ZrW 2 O 8 Nanopowder
Author(s) -
Kanamori Kenji,
Kineri Tohru,
Fukuda Ryohei,
Nishio Keishi,
Hashimoto Masashi,
Mae Hideo
Publication year - 2009
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2008.02840.x
Subject(s) - spark plasma sintering , materials science , relative density , sintering , microstructure , amorphous solid , composite material , analytical chemistry (journal) , chemistry , crystallography , chromatography
Dense ZrW 2 O 8 was prepared by spark plasma sintering (SPS), using amorphous ZrW 2 O 8 nanopowder as a raw material, at 873 K for 10 min. We investigated the effects of SPS conditions, such as sintering temperature, heating rate, and the discharge power that is expressed as the product of pulsed direct current and voltage, on the densification process of ZrW 2 O 8 . The relative density and microstructure of ZrW 2 O 8 prepared by SPS were compared with those of ZrW 2 O 8 prepared by hot pressing (HP). The relative density of ZrW 2 O 8 prepared by HP at 873 K for 1 h was 63.1%. On the contrary, the relative density of ZrW 2 O 8 prepared by SPS at 873 K for 10 min at a heating rate of 50 K/min was 98.6%. These results show that the discharge pressure that is proportional to discharge power enhances the densification and grain growth of ZrW 2 O 8 in the SPS process.