Creep deformation of single crystals of binary and some ternary MoSi2 with the C11b structure |
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| Affiliation: | 1. School of Materials Science and Engineering, State Key Lab of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China;2. State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming 650106, China;1. Centro de Investigación Científica y de Educación Superior de Ensenada, 3918 Carretera Tijuana-Ensenada, Ensenada, Baja California CP 22860, Mexico;2. Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, km. 107 Carretera Tijuana-Ensenada, Ensenada, Baja California CP 22860, Mexico;1. School of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, China;2. National Key Laboratory for Nuclear Fuel and Materials, Nuclear Power Institute of China, Chengdu 610041, China;3. State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming 650106, China;1. Astrakhan State University, 20A Tatishchev Street, Astrakhan, 414056, Russia;2. Astrakhan State Technical University, 16 Tatishchev Street, Astrakhan, 414025, Russia;3. F. D. Ovcharenko Institute of Biocolloidal Chemistry, NAS of Ukraine, 42 Boulevard Vernadskogo, 03142 Kiev, Ukraine;4. Taras Shevchenko Kiev National University, Department of Physics, 64/13 Volodymyrska Street, 01601 Kyiv, Ukraine |
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| Abstract: | The creep deformation behavior of binary and some ternary MoSi2 single crystals with the soft [0 15 1] and hard [001] orientations has been investigated in the temperature range from 1200 to 1400°C in compression. The alloying elements studied include Nb and Al that form a C40 disilicide with Si and W and Re that form a C11b disilicide with Si. The creep strain rate for the [001] orientation is significantly (2 orders of magnitude) lower than that for the soft [0 15 1] orientation. The creep strain rate for the [0 15 1] orientation is improved by an order magnitude upon alloying with Re and Nb while alloying with W and Al causes a decline in the creep properties of this orientation. The creep strain rate for the [001] orientation is further improved upon alloying with Re, Nb, W and Al with the extent of improvement significantly larger for the Re addition. |
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