환원/침탄공정에 의한 TiC/Co 복합분말 합성
Synthesis of TiC/Co Composite Powder by the Carbothermal Reduction Process
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Ultra-fine TiC/Co composite powder was synthesized by the carbothermal reduction process without wet chemical processing. The starting powder was prepared by milling of titanium dioxide and cobalt oxalate powders followed by subsequent calcination to have a target composition of TiC-15 wt.%Co. The prepared oxide powder was mixed again with carbon black, and this mixture was then heat-treated under flowing argon atmosphere. The changes in the phase, mass and particle size of the mixture during heat treatment were investigated using XRD, TG-DTA and SEM. The synthesized oxide powder after heat treatment at 700℃ has a mixed phase of TiO2 and CoTiO3 phases. This composite oxide powder was carbothermally reduced to TiC/Co composite powder by the solid carbon. The synthesized TiC/Co composite powder at 1300℃ for 9 hours has particle size of under about 0.4 ㎛.
Abstract
Ultra-fine TiC/Co composite powder was synthesized by the carbothermal reduction process without wet chemical processing. The starting powder was prepared by milling of titanium dioxide and cobalt oxalate powders followed by subsequent calcination to have a target composition of TiC-15 wt.%Co. The prepared oxide powder was mixed again with carbon black, and this mixture was then heat-treated under flowing argon atmosphere. The changes in the phase, mass and particle size of the mixture during heat treatment were investigated using XRD, TG-DTA and SEM. The synthesized oxide powder after heat treatment at 700℃ has a mixed phase of TiO2 and CoTiO3 phases. This composite oxide powder was carbothermally reduced to TiC/Co composite powder by the solid carbon. The synthesized TiC/Co composite powder at 1300℃ for 9 hours has particle size of under about 0.4 ㎛.
참고문헌 (18)
- K.J.A. Brookes, "Word Directory and Handbook of Hardmetals and Hard Materials, 6th ed", pp.9~ (1996), International Carbide Data
- G.G. Lee, , Powder Metallurgy, 43, pp.79~ (2000)
- Gil-Geun Lee, "Effect of Powder Synthesis Atmosphere on the Characteristics of IronNanopowder in a Plasma Arc Discharge Process", Metals and Materials International, 11(2), pp.177~181 (2005), 대한금속·재료학회
- K.E. Gonsalves, "Handbook of Nanostructured Materials and Nanotechnology", pp.1~ (2000), Academic Press
- B.K. Kim, , Advanced Performance Materials, 5, pp.341~ (1998)
- G.G. Lee, , J. Korean Powder Metallurgy Institute, 10, pp.228~ (2003)
- M. Sherif El-Eskandarany, , J. of Alloys Compound, 305, pp.225~ (2000)
- H. Preiss, , J. of European Ceramic Society, 19, pp.195~ (1999)
- N.A. Hassine, , Refractory Metals & Hard Materials, 13, pp.353~ (1995)
- R. Koc, , J. of European Ceramic Society, 17, pp.1309~ (1997)
- R. Koc, , J. Mater. Sci., 33, pp.1049~ (1998)
- R. Koc, , J. Mater. Sci., 32, pp.3101~ (1997)
- G.G. Lee, , Materials Transactions, 47, pp.3007~ (2006)
- G.H. Ha, , Proceeding of EURO PM 2006 Vol. 1 Hard Materials, 통권 : 97 (2006), European Powder Metallurgy Association
- 이길근, "분무건조법에 의해 제조된 Ti-Co-O계 산화물 분말의 환원", 침탄반응에미치는 코발트 산화물의 영향, 2005, pp.12(5), 336~344[DOI]
- G.G. Lee, , Materials Transactions, 44, pp.2145~ (2003)
- R. Shaviv, , Mater. Sci. Eng., A209, pp.345~ (1996)
- L.M. Berger, , Int. J. Refract. Met. Hard Mater., 17, pp.235~ (1999)