Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1607296 | Journal of Alloys and Compounds | 2016 | 8 Pages |
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
Authors
R. Liu, Z.M. Xie, Q.F. Fang, T. Zhang, X.P. Wang, T. Hao, C.S. Liu, Y. Dai,