As-cast B–Mo–Ti alloys and samples annealed at subsolidus temperatures are experimentally studied by X-ray diffraction and scanning electron microscopy with electron microprobe analysis. Solidus temperatures and temperatures of other phase transformations are measured by differential thermal analysis and pyrometry with the Pirani–Alterthum method. No ternary compounds are found in the examined alloys. Based on the data obtained, the B–Mo–Ti liquidus and solidus surfaces have been constructed for the first time.
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Notes
The phases in round brackets denote solid solutions on their basis (brackets are not used in the notation of boride-based solutions for simplification).
References
S. Lampman, “Wrought titanium and titanium alloys,” in: Metals Handbook, Tenth Edition, Vol. 2, Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, International Materials Park, ASM, Ohio (1990), pp. 592–633.
S. Tamirisakandala, R. B. Bhat, J. S. Tiley, and D. B. Miracle, “Grain refinement of cast titanium alloys via trace boron addition,” Scripta Mater., 53, 1421–1426 (2005).
T. T. Cheng, “The mechanism of grain refinement in TiAl alloys by boron addition—an alternative hypothesis,” Intermetallics, 8, No. 1, 29–37 (2000).
U. Hecht, V. Witusiewicz, A. Drevermann, and J. Zollinger, “Grain refinement by low boron additions in niobium-rich TiAl-based alloys,” Intermetallics, 16, 969–978 (2008).
K. S. Ravi Chandran and D. B. Miracle, “Titanium–boron alloys and composites: Processing, properties, and applications,” JOM, 56, No. 5, 32–33 (2004).
A. Wittmann, H. Nowotny, and H. Boller, “Ein beitrag zum dreistoff titan–molybdän–bor,” Monatsh. Chem., 91, No. 4, 608–615 (1960).
S. O. Ordan’yan, N. V. Kosterova, and A. I. Avgustinik, “Constitution of the Ti–B–Mo and Ti–B–W systems at 1400°C,” Dep. VINITI No. 2563–76, in: Phase Diagrams of Metal Systems [in Russian] (1976); N. V. Ageev (ed.), I. G. Eroshenkova, V. G. Olenicheva, and L. A. Petrova, VINITI, Moscow (1978), Issue XXII, pp. 149–150.
S. S. Ordan’yan, N. V. Kosterova, and A. I. Avgustinik, “Phase equilibria in the Ti–B–Mo system at 1400°C,” Izv. AN SSSR. Neorg. Mater., 13, No. 5, 844–846 (1977).
B. Post, F. W. Glaser, and D. Moskowitz, “Transition metal diborides,” Acta Metall., 2, No. 1, 20–25 (1954).
K. I. Portonoi and G. V. Samsonov, “Examining boride-based materials,” in: Study of Heat-Resistant Alloys [in Russian], Inst. Metall. Baikova AN SSSR, Moscow (1959), Vol. 5, pp. 192–198.
M. S. Kovalchenko, G. V. Samsonov, and G. A. Yasinskaya, “Alloys of transition metal borides and other metals,” Izv. Akad. Nauk SSSR. Metall. Toplivo, 2, No. 2, 115–119 (1960).
J. M. Leitnacker, N. H. Krikorian, and M. C. Krupka, “Unusual ternary behavior of transition metal borides,” J. Electrochem. Soc., 109, 66 (1962).
A. M. Zakharov and V. S. Pol’kin, “Molybdenum corner of the ternary Mo–Ti–В and Mo–Zr–B systems,” Izv. Vuz. Tsvet. Metall., No. 4, 109–113 (1972).
T. B. Gorbacheva, Yu. I. Krylov, and N. M. Mikova, “Examining high-temperature interaction of refractory metals with borides,” in: O. P. Kolchin (ed.), Hard Alloys and Refractory Metals [in Russian], Metallurgiya, Moscow (1973), No. 14, pp. 239–243.
Yu. B. Yuriditskii, V. A. Pesin, and S. S. Ordan’yan, “Change in the fine structure of titanium diboride occurring during the sintering of A TiB2–Fe(Mo) cermet,” Powder Metall. Met. Ceram., 21, No. 4, 280–282 (1982).
T. Velikanova and M. Turchanin, “Boron–molybdenum–titanium,” in: Landolt-Börnstein, Numerical Data and Functional Relationships in Science and Technology, W. Martinseen (ed.), New Series. Group IV: Physical Chemistry, G. Effenberg and S. Ilyenko (eds.), Ternary Alloy Systems, Phase Diagrams, Crystallographic and Thermodynamic Data Critically Evaluated by MSIT, Vol. 11E2, Springer-Verlag, Berlin, Heidelberg (2008), pp. 46–60.
T. V. Massalski, P. R. Subramanian, H. Okomoto, et al., Binary Alloy Phase Diagrams: Handbook, 3 Vols., 2nd ed., International Materials Park, ASM, Ohio (1990), p. 3589.
T. Lunström and L. E. Tergenius, “On the solid solution of copper in β-rhombohedral boron,” J. Less-Common Met., 47, 23–28 (1976).
P. Rogl, “Nb–B–C (niobium–boron–carbon),” in: G. Effenberg (ed.), Phase Diagrams of Metal–Boron–Carbon Ternary Systems, International Materials Park, ASM–MSI, Ohio, USA (1998), pp. 202–205.
J. L. Murray, P. K. Liao, and K. E. Spear, “The B–Ti (boron–titanium) system,” Bull. Alloy Phase Equilib., 7, No. 6, 550–555 (1986).
J. L. Murray, P. K. Liao, and K. E. Spear, “The B–Ti (boron–titanium) system,” in: J. L. Murray (ed.), Phase Diagrams of Binary Titanium Alloys, ASM International Materials Park, Ohio (1987), pp. 33–38.
B. Predel, “B–Mo (boron–molybdenum),” in: Landolt-Börnstein, Numerical Data and Functional Relationships in Science and Technology, O. Madelung (ed.), New Series. Group IV: Physical Chemistry, Phase Equilibria, Crystallographic and Thermodynamic Data of Binary Alloys, Springer-Verlag, Berlin, Heidelberg (1992), Vol. 5b, pp. 1–4.
V. T. Witusiewicz, A. A. Bondar, U. Hech, et al., “The Al–B–Nb–Ti system. Re-assessment of the constituent binary systems B–Nb and B–Ti on the basis of new experimental data,” J. Alloys Compd., 448, 185–194 (2008).
D. B. Borisov, L. V. Artyukh, A. A. Bondar, et al., “Titanium-boride eutectic materials. Structure of the Ti–Nb–B alloys and phase equilibria,” Powder Metall. Met. Ceram., 46, No. 1–2, 58–71 (2007).
E. Rudy, Ternary Phase Equilibria in Transition Metal–Boron–Carbon–Silicon Systems, Tech. Rep. AFML-TR-65-2, Part V, Compendium of Phase Diagram Data, Air Force Materials Laboratory, Wright-Patterson, Ohio (1969), p. 689.
K. E. Spear and P. K. Liao, “The B−Mo (boron–molybdenum) system,” Bull. Alloy Phase Diagr., 9, No. 4, 457–466 (1988).
N. P. Lyakishev (ed.), Binary Phase Diagrams: Handbook (in 3 Vols.) [in Russian], Mashinostroenie, Moscow (1996), Vol. 1, p. 992.
M. Pirani and H. Alterthum, “Uber eine methode zur schmelzpunktbestimmung an hochschmelzenden metallen,” Z. Elektrochem., 29, No. 1–2, 5–8 (1923).
Ju. A. Kocherzhinsky, “Differential thermocouple up to 2450°C and thermographic investigations of refractory silicides,” in: Proc. 3rd ICTA on Thermal Analysis (Davos), Birkhäuser Verlag, Basel (1971), Vol. 1, pp. 549–559.
Yu. A. Kocherzhinskii, E. A. Shishkin, and V. I. Vasilenko, “DTA unit with a thermocouple sensor up to 2200°C,” in: Phase Diagrams of Metal Systems [in Russian], Nauka, Moscow (1971), pp. 245–249.
A. A. Bondar, V. A. Maslyuk, T. Ya. Velikanova, and A. V. Grytsiv, “Phase equilibria in the Cr−Ni−C system and their use for developing physicochemical principles for design of hard alloys based on chromium carbide,” Powder Metall. Met. Ceram., 36, No. 5–6, 242–252 (1997).
T. Ya. Velikanova, A. A. Bondar, and A. V. Grytsiv, “The chromium–nickel–carbon phase diagram,” J. Phase Equilib., 20, No. 2, 125–147 (1999).
L. V. Artyukh, D. B. Borysov, A. A. Bondar, et al., “Titanium–boride eutectic materials: Phase equilibria and constitution of alloys in the Ti-rich portion of the Ti–V–B system,” High Temp. Mat. Pr.–Isr., 25, No. 1–2, 75–82 (2005).
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Translated from Poroshkovaya Metallurgiya, Vol. 53, No. 3–4 (496), pp. 135–150, 2014.
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Potazhevska, O.A., Bondar, A.A., Duma, L.A. et al. Phase Equilibria in the Melting/Solidification Range of B–Mo–Ti Alloys. Powder Metall Met Ceram 53, 230–242 (2014). https://doi.org/10.1007/s11106-014-9609-z
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DOI: https://doi.org/10.1007/s11106-014-9609-z