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http://dx.doi.org/10.4313/JKEM.2020.33.5.373

Synthesis of TiN-Coated cBN Powder by Sol-Gel Method Using Titanium (IV) Isopropoxide  

Lee, Youn Seong (Optic & Electronic Component Materials Center, Electronic Convergence Materials Division, Korea Institute of Ceramic Engineering and Technology)
Kim, Sun Woog (Optic & Electronic Component Materials Center, Electronic Convergence Materials Division, Korea Institute of Ceramic Engineering and Technology)
Lee, Young Jin (Optic & Electronic Component Materials Center, Electronic Convergence Materials Division, Korea Institute of Ceramic Engineering and Technology)
Lee, Ji Sun (Optic & Electronic Component Materials Center, Electronic Convergence Materials Division, Korea Institute of Ceramic Engineering and Technology)
Shin, Dongwook (Division of Materials Science and Engineering, Hanyang University)
Kim, Sae-Hoon (Department of Ceramic Engineering, Gangneung Wonju National University)
Kim, Jin Ho (Optic & Electronic Component Materials Center, Electronic Convergence Materials Division, Korea Institute of Ceramic Engineering and Technology)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.33, no.5, 2020 , pp. 373-379 More about this Journal
Abstract
In this study, TiN-coated cBN (cubic-structure boron nitride) powders were successfully synthesized by a sol-gel method using titanium (IV) isopropoxide (TTIP) and by controlling the heat treatment conditions. After the sol-gel process, amorphous nano-sized TiOx was uniformly coated on the surface of cBN powder particles. The obtained TiOx-coated cBN powders were heated at 1,000~1,300℃ for 1 or 6 h in a flow of 95%N2-5%H2 mixed gas. With increasing temperature, the chemical composition of the TiOx coating layer changed in the order of TiO2→Ti6O11→Ti4O7→TiN due to reduction of the Ti ions. The TiN coating layer was observable in the samples heated at 1,200℃ and appeared as the main phase in the sample heated at 1,300℃. The resulting thickness of the TiN coating layer of the sample heated at 1,300℃ was approximately 45~50 nm.
Keywords
Cubic boron nitride; cBN; TiN;
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