Bibliographic Details
| Title: |
In-situ joining of SiCf/SiC composites to single-crystal CMSX-6 superalloy via active unidirectional casting technology |
| Authors: |
Yingxin Wang, Fu Wang, Qiang Yang, Dichen Li, Yunsong Zhao, Jiantao Wu |
| Source: |
Journal of Materials Research and Technology, Vol 38, Iss, Pp 30-37 (2025) |
| Publisher Information: |
Elsevier BV, 2025. |
| Publication Year: |
2025 |
| Subject Terms: |
In-situ joining, SiCf/SiC composite, Mining engineering. Metallurgy, Ni-based single-crystal superalloy, Active unidirectional casting, TN1-997, Microstructure, High-temperature shear property |
| Description: |
To address the manufacturability challenges of silicon carbide fiber-reinforced silicon carbide (SiCf/SiC) composites and to enhance their industrial applications, this study developed an active unidirectional casting technology to in-situ join SiCf/SiC composites with Ni-based single crystal (SC) CMSX-6 superalloy. The macro- and microstructure, as well as the high-temperature tearing performance of the joint, were investigated. The results demonstrated the successful fabrication of defect-free SiCf/SiC/SC CMSX-6 joints. The in-situ generated CMSX-6 portion displayed a SC structure, with a maximum crystallographic misorientation of approximately 8.34° from the favored [001] orientation of Ni-based SC superalloys. A reaction interlayer composed of a nickel matrix, along with TiC, Cr3C2, and Ni31Si12 phases, formed between the SiCf/SiC and superalloy, exhibiting a crystallographic orientation close to [101]. The maximum shear strength of the joining interface at 800 °C achieved approximately 25 MPa, which exceeds the interlaminar bonding strength of the SiCf/SiC composite. This desirable performance is ascribed to the combined effects of the pinning mechanism, which arises from the infiltration of molten CMSX-6 into SiCf/SiC composite, and the reduction of residual thermal stress afforded by the graded interface formed during joining. |
| Document Type: |
Article |
| Language: |
English |
| ISSN: |
2238-7854 |
| DOI: |
10.1016/j.jmrt.2025.07.185 |
| Access URL: |
https://doaj.org/article/549d28483a714bbfbb844849d962af32 |
| Rights: |
CC BY NC ND |
| Accession Number: |
edsair.doi.dedup.....a3da8acd44709bef6e656e8f38862f98 |
| Database: |
OpenAIRE |