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- Title
Solid-State Reactions of SiC/W--25Re Alloy and Thermal Stability of SiC/Ti/W--25Re Alloy under High-Temperature Annealing.
- Authors
Han, Jun Sae; Jang, Seung Sik; Park, Dong Yong; Oh, Yong Jun; Park, Seong Jin
- Abstract
Solid-state reactions of SiC/W--25Re alloy and SiC/Ti/W--25Re alloy are investigated under the hightemperature annealing at1 500°C. The interface reaction layer between SiC and W--25Re alloy is composed of WC-- WSi2-- W5Si3-- W--Re sigma phase -- dendrite microstructure. Solid-state reactions between W and SiC form two types of W-silicides and the relative depletion of W brings formation of the W--Re sigma phase. In order to prevent direct interfacial reactions, Ti layer is intercalated as a secondary buffer layer. Compared to the original interface, thicknesses of both reaction layer and dendrite layer are significantly decreased. Although the thermal reaction of Ti and W brings inhomogeneous characteristics, the proposed functionally graded structure is expected to enhance the thermal stability.
- Subjects
STATIC relays; SIMULATED annealing; THERMAL stability
- Publication
Advanced Engineering Materials, 2016, Vol 18, Issue 9, p1574
- ISSN
1438-1656
- Publication type
Article
- DOI
10.1002/adem.201500660