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J. Korean Ceram. Soc. > Volume 36(1); 1999 > Article
Journal of the Korean Ceramic Society 1999;36(1): 7.
SHS 마이크로파에 의한 TiZrB$_2$ 복합재료의 합성 및 특성연구
이형복, 윤영진, 오유근, 안주삼1
명지대학교 무기재료공학과
A Study on Synthesis and Characterization of TiZrB$_2$ Composite by SHS Microwave
TiZrB2 solid solution was synthesized using fine powders of Ti, Zr and B by SHS microwave process. The characterization of the synthesized powder and sintered bodies ws investigated. The combustion temperature and rate were increased with increasing the mole ratio of Zr in temperature profile, and showed the maximum combustion temperature and velocity values of 285$0^{circ}C$ and 14.6mm/sec in Ti0.2Zr0.8B2 composition. Phase separation has been occured into a composite with TiB2 and ZrB2 phases from TiZrB2 solid solution, which was hot pressed sintering at 30 MPa for an hour at 190$0^{circ}C$. At the composition of Ti0.8Zr0.2B2 the best properties has been obtained in relative density, bending strength, fracture toughness and hardness, with 99%, 680 MPa, 7.3MPa.m1/2 and 2750 Kg/$textrm{mm}^2$ respectively.
Key words: TiZrB$_2$ solid solution, SHS microwave, Temperature profile, Phase separation, TiB$_2$, ZrB$_2$
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