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Active metal brazing and characterization of brazed joints in c-c and c-sic composites to copper-clad-molybdenum system
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Singh, M. Asthana, R. |
| Copyright Year | 2008 |
| Description | Carbon/carbon composites with CVI and resin-derived matrices, and C/SiC composites reinforced with T-300 carbon fibers in a CVI SiC matrix were joined to Cu-clad Mo using two Ag-Cu braze alloys, Cusil-ABA (1.75% Ti) and Ticusil (4.5% Ti). The brazed joints revealed good interfacial bonding, preferential precipitation of Ti at the composite/braze interface, and a tendency toward delamination in resin-derived C/C composite. Extensive braze penetration of the inter-fiber channels in the CVI C/C composites was observed. The Knoop microhardness (HK) distribution across the C/C joints indicated sharp gradients at the interface, and a higher hardness in Ticusil than in Cusil-ABA. For the C/SiC composite to Cu-clad-Mo joints, the effect of composite surface preparation revealed that ground samples did not crack whereas unground samples cracked. Calculated strain energy in brazed joints in both systems is comparable to the strain energy in a number of other ceramic/metal systems. Theoretical predictions of the effective thermal resistance suggest that such joined systems may be promising for thermal management applications. |
| File Size | 3894915 |
| Page Count | 17 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20090008499 |
| Archival Resource Key | ark:/13960/t1kh5k02d |
| Language | English |
| Publisher Date | 2008-10-05 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Carbon-carbon Composites Carbon Fibers Thermal Resistance Metal Joints Brazing Temperature Control Copper Hardness Cladding Soldered Joints Matrix Materials Resin Matrix Composites Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Presentation |
