|
The objective of this diploma work
is to develop the properties and processing of the commercial silicon
nitride (Si3N4) powder SicoNide from Permascand, in
order to meet demands of the costumers and the manufacturers of Si3N4
components. Si3N4 is the more important ceramic
material for structural applications (ball bearings, wear and engine
parts) and the manufacture of components is based on powder processing and
pressing as the major shaping technique. To further strengthen the
position and broaden the field of applications, it is desirable to make
cheaper powder and processing available. More refined products that
minimise the need of equipment and know-how at the component manufacturer
are also in demand. Various pre-treatments of the powder, different
sintering aid compositions, pressing aids, granulation techniques etc will
be evaluated in close collaboration with Permascand, a Swedish
manufacturer of Si3N4 powders and with some of its
international costumers. Materials will be shaped, sintered, mechanically
tested and microstructurally characterised. The aim is to achieve adapted
powder concepts that can be provided by the powder manufacturer to the
component manufacturer resulting in an overall market increase for Si3N4.
|
