while the tensile ductility doubled

In the National Natural Science Foundation and other projects funded by the [1] Materials, Xi'an Jiaotong University, State Key Laboratory Sun Jun Task Force successfully developed nano-structured dispersion strengthened molybdenum alloys. The material has a rare earth oxide nano-particles and ultrafine-grained microstructure reinforced structure, while the tensile ductility doubled.
China's molybdenum reserves, production and consumption volume ranking first in the world. Molybdenum is widely used in stainless steel and other materials for the production of steel, molybdenum alloys also because of their excellent thermal conductivity with a high temperature and other characteristics, in the aerospace, machinery, metallurgy and other fields has broad application prospects.
However, molybdenum has a low temperature brittleness, low strength, ductility and poor is insufficient, molybdenum alloy deep processing more difficult, its application is more restricted. Over the years, the production of Molybdenum Molybdenum primary products. Therefore, the development with better performance, higher value-added Molybdenum tube alloys, molybdenum industry for the development of our country has an important significance.
Sun Jun engineering research group from the actual needs, dating back to the difficulty of material preparation techniques, revealing the rare earth oxide doped molybdenum alloy grains and intragranular and grain boundary characteristics and particle size effect toughening mechanism, a robust of quantitative analytical model and proposed toughening of nano-doped new ideas.
On this basis, the researchers developed a molecular liquid doped rare earth oxides prepared by mixing nano-molybdenum alloy containing key technologies to solve the rare earth oxide nano-and non-reunion of the molybdenum grains and grain boundaries uniformly dispersed and nano ultrafine grain structure constraints such as high temperature stability of development of the sector three key issues. They prepared molybdenum alloy strength and extension, than has been reported toughness international class companies best level similar materials, while significantly lower plastic brittle transition temperature, high alloy recrystallization temperature and high temperature tensile strength and ductility significantly.
It is reported that the relevant technologies have to achieve industrial-scale applications, the project also received the 2012 Ministry of Education, Technological Invention Award.
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