Effect of MoSi2/rare earth composite particles on microstructure and mechanical properties of molybdenum |
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| Authors: | Xiuqi ZanDezhi Wang Kaihua ShiAokui Sun Bing Xu |
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| Affiliation: | Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Changsha 410083, PR China School of Materials Science and Engineering, Central South University, No. 932, Lushan Nanlu, Changsha 410083, PR China |
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| Abstract: | MoSi2/La2O3 and MoSi2/Y2O3 composite particles were prepared by mechanical milling and doped into molybdenum by solid-solid method, respectively. Rods with a diameter of 17 mm were made by pressing and sintering. The effects of different composite particles on microstructures and strength of the as-sintered molybdenum were investigated. Results show that the MoSi2/La2O3 and MoSi2/Y2O3 composite particles transformed to La2O3/Mo5Si3 and Y2O3/Mo5Si3 composite particles due to the in situ reaction between Mo and MoSi2 during sintering process. Mo5Si3/La2O3 and Mo5Si3/Y2O3 composite particles can reduce the grain size and improve both strength and toughness of sintered molybdenum significantly. Mo5Si3/Y2O3 composite particles contribute more to the strength, while the effect of Mo5Si3/La2O3 on toughness is greater than that of Mo5Si3/Y2O3. |
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| Keywords: | MoSi2/rare earth Sintered molybdenum Microstructure Property |
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