• Title/Summary/Keyword: nano materials

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Fabrication and sintering of nano $TiN_x$ and its composites (Nano $TiN_x$와 그 복합체의 제조 및 소결)

  • Kim, Dong-Sik;Kim, Sung-Jin;Rahno, Khamidova;Park, Sung-Bum;Park, Seung-Sik;Lee, Hye-Jeong;Lee, Sang-Woo;Cho, Kyeong-Sik;Woo, Heung-Sik;Ahn, Joong-Ho
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.16 no.3
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    • pp.101-105
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    • 2006

  • We fabricated the nano $TiN_x$ by making of reaction between titanium powder and $Si_3N_4$ during planetary milling. The $TiN_x$ powder was sintered by spark plasma sintering machine after mixing with 50 wt% of titanium powder, and the sintered body was heat-treated at $850^{\circ}C$ in order to investigate its hardness property at the elevated temperature. We analyzed crystal structure by XRD. We observed the peaks of $TiN_{0.26}$ and TiN after 10 hours milling, and we observed TiN peak mainly after 20 hours milling. The reacted particle size distribution was investigated by FE-SEM. Increase of milling time, the size of reacted particles was decreased and the $10{\sim}20nm$ size of $TiN_x$ on the surface of titanium and $TiN_x$ was observed after 20 hours milling. The micro-Vickers hardness of mixed sintered body was about $1050kgf/mm^2$.

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