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Korean Journal of Metals and Materials > Volume 55(1); 2017 > Article
Korean Journal of Metals and Materials 2017;55(1): 10-15. doi: https://doi.org/10.3365/KJMM.2017.55.1.10
FeB와 TiH2 혼합분말의 유성볼밀 및 후속열처리에 의한 Fe-TiB2 나노복합분말 in situ 제조
Xuan-Khoa Huynh1, 배선우2, 김지순2
1하노이과학기술대학교 재료공학부
2울산대학교 첨단소재공학부
in situ Fabrication of Fe-TiB2 Nanocomposite Powder by Planetary Ball Milling and Subsequent Heat-treatment of FeB and TiH2 Powder Mixture
Xuan-Khoa Huynh1, Sun-Woo Bae2, Ji Soon Kim2
1School of Materials Science and Engineering, Hanoi Uneversity of Science and Technology, No 1, Dai Co Viet Street, Hanoi City, Vietnam
2School of Materials Science and Engineering, University of Ulsan, Ulsan 44610, Republic of Korea
Correspondence  Ji Soon Kim ,Tel: +82-52-259-2244, Email: jskim@ulsan.ac.kr
Received: 22 July 2016;  Accepted: 25 July 2016.  Published online: 5 January 2017.
ABSTRACT
Fe-TiB2 powder was synthesized in-situ by the planetary ball milling and subsequent heat-treatment of an iron boride (FeB) and titanium hydride (TiH2) powder mixture. Mechanical activation of the (FeB+TiH2) powder mixtures was observed after a milling time of 3 hours at 700 rpm of rotation speed, but activation was not the same after 1 hour milling time. The particle size of the (FeB+ TiH2) powder mixture was reduced to the nanometer scale, and each constituent was homogeneously distributed. A sharp exothermic peak was observed at a lower temperature (749 ℃) on the DSC curves for the (FeB+TiH2) powder mixture milled for 3 hours, compared to the one milled for 1 hour (774 ℃). These peaks were confirmed to have resulted from the formation reaction of the TiB2 phase, from Ti and B elements in the FeB. The Fe-TiB2 composite powder fabricated in situ exhibited only two phases of Fe and TiB2 with homogeneous distribution. The size of the TiB2 particulates in the Fe matrix was less than 5 nm.
Keywords: Fe-TiB2, nanocomposite, mechanical alloying/milling, in situ fabrication, powder processing, iron boride, titanium hydride
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