Effect of High-Dose Ion Implantation of Niobium
on Changing the Mechanical Properties and Structure
of Molybdenum Used at the Stage of Sintering Nuclear Fuel from Uranium Dioxide
F. V. MAKAROV1, V. V. GUZEEV1, V. P. PISHCHULIN1, A. YA. SVAROVSKY1 and T. I. GUZEEVA2
1 Seversk Technological Institute of National Research Nuclear University MEPhI,
Pr. Kommunisticheskiy 65, Tomsk Region, Seversk 636036 (Russia),
mfedorv@rambler.ru
2 Tomsk Polytechnical University,
Pr. Lenina 30, Tomsk 634050 (Russia)
Keywords: molybdenum, uranium dioxide, destruction, molybdenum carbides, molybdenum nitrides, molybdenum microstructure, ion implantation, operational reliability
Pages: 503–508
Abstract
Results of the investigation of reasons causing the destruction of molybdenum containers used for sintering the pellets of fuel uranium dioxide are reported. An effect of niobium ion implantation changing the microstructure and mechanical properties of molybdenum was investigated. It was demonstrated that niobium prevents the formation of carbide, nitride and oxide phases on the boundaries of molybdenum grains, causes the rate of metal grain growth in the course of recrystallization to decrease and stabilizes mechanical properties thus increasing the operational reliability by 30–60 %.
UDC 669.28:54
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