GOODFELLOW: Composite Sintered Ceramic
Goodfellow Ceramic and Glass Division recently announced the availability of Shapal™ Hi-M soft, a composite sintered body of aluminum nitride (AlN) and boron nitride (BN) that reportedly addresses machining difficulties associated with the brittleness and hardness of traditional ceramics. According to the company, Shapal Hi-M soft can be machined into small or complex shapes and is suitable for a wide range of applications due to the following properties:
- Excellent machinability—high-precision, close-tolerance components can be machined using a wide range of techniques, including drilling, grinding, turning and milling
- High thermal conductivity—approximately four times that of alumina and at least 50 times that of machinable glass ceramic
- High mechanical strength—flexural strength of 300 MPa, comparable to alumina
Additional advantages reportedly include excellent electrical insulation, low thermal expansion, low dielectric loss, excellent high-temperature properties, and suitability for vacuum applications. Shapal Hi-M soft is available from Goodfellow as rods and sheets or as finished components precision-machined to customer drawings. Typical applications include prototyping and small volume production, electrical components, heat sinks, vacuum components, jigs and fixtures, and crucibles for vacuum applications.