The Peculiarities of Structure Formation Upon Sintering of TiH2+TiВ2 Powder Blends

О.М. Іvasishin; G.А. Bagliuk; О.О. Stasiuk; D.G. Savvakin

doi:10.15330/pcss.18.1.15-20

Authors

О.М. Іvasishin Institute for Metal. GV Kurdyumov NAS of Ukraine
G.А. Bagliuk Institute of Materials Science I.M.Frantsevych NAS of Ukraine
О.О. Stasiuk Institute of Materials Science I.M.Frantsevych NAS of Ukraine
D.G. Savvakin Institute for Metal. GV Kurdyumov NAS of Ukraine

DOI:

https://doi.org/10.15330/pcss.18.1.15-20

Keywords:

titanium, boride, hydride, sintering, structure, powder, dehydrogenation, metal matrix composite, powder blend

Abstract

The investigation results on peculiarities of phase and structure formation as well as sintering kinetic of compacted TiH₂- TiВ₂ powder blends. It was shown, the most intensive shrinkage upon heating took place within temperature range of TiH₂dehydrogenation (400 ÷ 650 ⁰С). Heating of powder blend up to sintering temperature (1350 ⁰С) resulted in formation of acicular TiB particles in titanium matrix, the amount of particles is increased with increase in exposure to 20 min. The longer duration of isothermal exposure did not lead to increase in amount and size growing of TiB particles. X-ray analysis of sintered TiН₂+TiВ₂ powder blend demonstrated the presence of titanium matrix phase, orthorhombic TiВ phase, and traces of Ti-B compounds of different concentrations (Ті₃В₄ and Ті₂В₅). The dilatometric investigations proved that addition of boride compounds and increase in boride content in powder blend led to decrease in shrinkage upon sintering as compared to shrinkage of single TiH₂ powder compacts.

References

[1] А. А. Illin, I. S. Polkin, Titanium alloys. Composition, structure, properties (VILS – MATI, Moskow, 2009).
[2] B. А. Kolachev, I. S. Eliseev, А. G. Bratukhin, V. D. Talalaev, Titanium alloys in aviation engines and aerospace technique (MAI, Moskow, 2001).
[3] Titanium´ 2003: Science and Technology: Proc. of 10th World Conf. On Titanium (Gamburg, Germany. Vol. 1-5, 2003). P. 3425.
[4] H. W. Wang, J. Q. Qi, C. M. Zou, D. D. Zhu, Z. J. Wei, Materials Science and Engineering 545, 209 (2012).
[5] H. K. S. Rahoma, X. P. Wang, F. T. Kong, Y. Y. Chen, J. C. Han, Materials & Design 87, 488 (2015).
[6] C. Poletti, Composites Science and Technology 68, 2171 (2008).
[7] S. Li, K. Kondoh, H. Imai, B. Chen, L. Jia, J. Umeda, Materials Science and Engineering. Vol.628, 75 (2015).
[8] V. N. Antsiferov, Sintered titanium-based alloys (Metallurgiya, Moskow, 1984).
[9] M. Sumida, Materials Transactions46(10), 2135 (2005).
[10] О. M. Ivasishin, Powder Metallurgy 9/10, 63 (1999).
[11] G. А. Bagluk, А. G. Bogacheva, А. А. Mamonova, I. B. Tikhonova, V. Dal Eastern-Ukrainian University Herald 9(1), 240 (2013).
[12] T. Saito, The Journal of The Minerals, Metals & Materials Society May, 33 (2004).
[13] О. M. Ivasishin, V. T. Cherepin, V. N. Kolesnik, N. M. Gumenyak, Instruments and experimental technique 3, 147 (2010).
[14] Z. Fan, Z. X. Guo, B. Cantor, Applied Science and Manufacturing 1, 131 (1997).
[15] H. W. Jeong, S. J. Kim, Y. T. Hyun, Y. T. Lee, Metals and Materials International 8(1), 25 (2002).