Abstract
Results are provided for a study of the reaction of MoSi2 with niobium and tantalum diborides. It is established that sections of MoSi2–Nb(Ta)B2 within the quaternary system Mo–Si–B–Nb(Ta) are described by eutectic composition diagrams with a eutectic temperature equal to 1870 and (1890 ± 30)°C. The diboride phase content is 20 and 14 mol.% respectively in systems with NbB2 and TaB2.
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