Solder carbon materials with innovative new product

Uploaded 16 Mar @ 15:16pm

Goodfellow is a leading global supplier of metals, alloys, ceramics, glasses, polymers, compounds, composites and other materials to meet the research, development and specialist production requirements of science and industry. The company is the exclusive supplier of C-Solder, a product that allows solder to be applied to graphitic materials.
C-Solder is the trade name for a group of new tin-based, lead-free low-temperature soldering alloys that enable the joining of various carbon materials, including carbon fibres or carbon nanotube fibres, in both carbon-carbon and carbon-metal combinations. The resultant bond is mechanically strong and electrically conductive.
It has a melting point of 232°C (solidus temperature) with a density of around 7.4g/cm3. Up to now, it has not been possible to apply soldering to graphitic materials as they are not wetted by the commercially available alloys. However, C-Solder allows a good wetting of surfaces to be joined with an excellent flow. Carbon can be soldered to metals such as copper and aluminium as well as ceramic and glass materials with the additional ability for aluminium to be soldered to aluminium without using flux. Among a variety of other benefits, C-Solder is also unaffected by cleaning solvents, not flammable, flux-free and lead-free. Furthermore, it is not affected by cleaning solvents and is electrically and thermally conductive.
The soldering of carbon materials using C-Solder may be performed in air at temperatures in the range 235 – 450 °C with
the use of a classic soldering iron, a soldering heat gun, or a torch. The high temperatures associated with a brazing process (800 to 1,200 °C) may lead to the combustion of carbon materials, particularly nanostructured ones, as well as creating stress concentration during cooling, especially if the joint comprises materials with considerably different thermal expansion coefficients. Thanks to its unique patented chemical composition, C-Solder alloys allow more control of the joining processes.
It also exhibits improved electrical and mechanical properties in relation to commercially available alloys.

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