Article ID Journal Published Year Pages File Type
1607296 Journal of Alloys and Compounds 2016 8 Pages PDF
Abstract
Yttria dispersion-strengthened tungsten with both enhanced strength and ductility was synthesized through sol-gel method followed by sintering and high-temperature swaging. The sol-gel synthesis process involving a molecular-level doping leads to a unique nanostructure that Y2O3 nano-particles were homogeneously dispersed in tungsten grains interior. The nanosized Y2O3 particles in sol-gel synthesized W-1%Y2O3 are stable in size even under a high sintering temperature of 2300 °C. The swaged sol-gel W-1%Y2O3 show ductility at a relative low temperature of 250 °C, which is about 100 °C and 250 °C lower than that of spark-plasma-sintered sol-gel W-1%Y2O3 and ball-milling synthesized W-1%Y2O3, respectively. The sol-gel method provides a promising access to high-performance nanostructured tungsten materials with both high strength and ductility, and can be easily scaled for industrial production.
Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
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