- POWDER METALLURGY Journal
- April 2011
International Standard Serial Number (ISSN)
Electronic International Standard Serial Number (EISSN)
- Thin and thick walled tubes made of 430L stainless steel for porous metal supported solid oxide fuel cells (SOFCs) were prepared by powder extrusion moulding (PEM). A gas atomised metal powder and a binder composed by 50?vol.?% high density polyethylene and 50?vol.?% paraffin wax were chosen. The most suitable powder loading for feedstock (68?vol.?%) was determined by means of torque experiments and rheological measurements. Mixing temperature was selected taking into account the results from differential scanning calorimetry. The extrusion of tubes was carried out in a single screw extruder and two kinds of tubes with two different wall thicknesses were obtained. In order to investigate the homogeneity of feedstock, microstructure of green tubes was evaluated by SEM. Thermal debinding was performed on the basis of thermogravimetric analysis results. After sintering, tubes with good dimensional stability and without defects were obtained. Different wall thicknesses extruded were 150 and 500??m.
- 430l stainless steel; metal supported sofc; powder extrusion moulding