Nano-TaC powder synthesized using modified spark plasma sintering apparatus and its densification

Nano-TaC powder synthesized using modified spark plasma sintering apparatus and its densification

Using a modified spark plasma sintering apparatus, nano-tantalum carbide powder was synthesized at 1450°C by the carbothermal reduction of Ta2O5. The synthesized TaC powder had ultra-fine particle size of 62nm and a low oxygen content of about 0.5wt%. The metal basis purity of the synthesized powder...

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Veröffentlicht in:Ceramics international 2015-11, Vol.41 (9), p.11637-11645
Hauptverfasser: Feng, Lun, Lee, Sea-Hoon, Yoon, Bo-La
Format: Artikel
Sprache:eng
Schlagworte:
A. Powders: solid state reaction
A. Sintering
Ceramics
D. Carbides
Densification
Grain size
Nanostructure
Oxygen content
Sintering (powder metallurgy)
Spark plasma sintering
Synthesis
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Lee, Sea-Hoon
Yoon, Bo-La
description Using a modified spark plasma sintering apparatus, nano-tantalum carbide powder was synthesized at 1450°C by the carbothermal reduction of Ta2O5. The synthesized TaC powder had ultra-fine particle size of 62nm and a low oxygen content of about 0.5wt%. The metal basis purity of the synthesized powder was 99.94%. The particle growth during synthesis was effectively suppressed by using the modified spark plasma sintering process due to the low synthesis temperature and fast heating/cooling rate. Dense monolithic TaC ceramics were obtained by sintering the synthesized powder without sintering additives at 2200°C for 30min under 80MPa pressure. The average grain size of the dense TaC ceramics was 4μm.
doi_str_mv 10.1016/j.ceramint.2015.05.124
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subjects A. Powders: solid state reaction
A. Sintering
Ceramics
D. Carbides
Densification
Grain size
Nanostructure
Oxygen content
Sintering (powder metallurgy)
Spark plasma sintering
Synthesis
title Nano-TaC powder synthesized using modified spark plasma sintering apparatus and its densification
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