1. Interface and mechanical properties of the single-layer long fiber reinforced Wf/W composites fabricated via field assisted sintering technology.
- Author
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Shu, Rui, Mao, Yiran, Coenen, Jan W., Terra, Alexis, Liu, Chao, Schönen, Stephan, Riesch, Johann, Linsmeier, Christian, and Broeckmann, Christoph
- Subjects
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FIBROUS composites , *PLASTIC fibers , *MATERIAL plasticity , *FIBERS , *SINTERING , *YTTRIUM oxides , *FINITE element method - Abstract
Tungsten fiber reinforced tungsten composites (W f /W) show a pseudo-ductile behavior because of extrinsic toughening mechanisms such as interface de-bonding, pull-out and plastic deformation of the fiber. In the present work, single-layer long fiber W f /W composites with and without yttrium oxide (Y 2 O 3) interface were fabricated by a field assisted sintering technology (FAST) process. The microstructure and mechanical properties of the prepared W f /W composites were characterized. The fracture behavior and toughening mechanisms were analyzed in detail combining the results of experiments and finite element modelling. W f /W composites with Y 2 O 3 interface (weak interfacial strength) show a typical pseudo-ductile fracture behavior and a higher flexural strength than the composites without Y 2 O 3 interface (strong interfacial strength). The fracture energy dissipation is mainly driven by plastic deformation of the fibers, but interface de-bonding is a necessary factor to ensure any extrinsic toughening mechanisms. • Single layer long fiber reinforced Wf/W composite fabricated via PM. • The pseudo-ductile behavior exists during the fracture process. • The plastic deformation of fibers contributes most in toughening mechanisms. • Interface de-bonding is a necessary to ensure other toughening mechanisms. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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