1. Microstructure and mechanical properties of Wf/W composites influenced by Y2O3 coating.
- Author
-
Shu, Rui, Mao, Yiran, Coenen, Jan W., Terra, Alexis, Liu, Chao, Schönen, Stephan, Höschen, Till, Riesch, Johann, Linsmeier, Christian, and Broeckmann, Christoph
- Subjects
- *
MICROSTRUCTURE , *RECRYSTALLIZATION (Metallurgy) , *SURFACE coatings , *MAGNETRON sputtering , *POWDER metallurgy , *FIBROUS composites , *SINTERING - Abstract
Tungsten fiber reinforced tungsten (W f /W) composite is one of the candidates to improve the toughness of tungsten materials. Powder metallurgy is a potential method to produce W f /W composites, but it may cause the recrystallization and grain growth of the reinforcing fibers during the high temperature sintering process. In the present work, a layer of Y 2 O 3 is coated on the fiber surface by magnetron sputtering to protect the fibers and prevent recrystallization and abnormal growth of grains. W f /W composites with and without Y 2 O 3 coating were fabricated by a field assisted sintering technology (FAST) process. Microstructure and mechanical properties were characterized. The influence of the Y 2 O 3 coating on the properties of the fiber was discussed in detail. The Y 2 O 3 coating can effectively prevent recrystallization and abnormal grain growth of fibers during the sintering process. The W f /W composites with Y 2 O 3 coating shows higher strength and pseudo-ductile behavior. • Continuous fiber reinforced W f /W composites are fabricated via PM. • Y 2 O 3 coating can prevent recrystallization and abnormal grain growth of fibers during the sintering process. • The improvement of the toughness is mainly contributed by the high strength of the fiber. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF