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http://dx.doi.org/10.3740/MRSK.2003.13.12.806

Synthesis of Ultrafine TaC Powders Using Tantalum Oxalate Solution  

Kwon, Dae-Hwan (Materials Technology Dept, Korea Institute of Machinery & Materials)
Hong, Seong-Hyeon (Materials Technology Dept, Korea Institute of Machinery & Materials)
Kim, Byoung-Kee (Materials Technology Dept, Korea Institute of Machinery & Materials)
Publication Information
Korean Journal of Materials Research / v.13, no.12, 2003 , pp. 806-811 More about this Journal
Abstract
Ultrafine TaC powders were synthesised by spray drying using tantalum oxalate solution. The spray dried powders were spherical shape and less than 30 $\mu\textrm{m}$ in size. The powders calcined at 500 and X$700^{\circ}C$ showed amorphous structures and $Ta_2$$O_{5}$ phase was obtained by calcining at $700^{\circ}C$. The particle size and shape remains constant after calcination. The calcined spherical powders were composed of an agglomerate of primary particles under 50 nm in size. The complete formation of TaC could be achieved by heat treatment at $1050^{\circ}C$ for 6 hrs. The observed size of TaC powders by TEM was less than 200 nm.
Keywords
Tantalum carbide; Tantalum oxalate; Ultrafine; Spray drying.;
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