Publikasjoner og ansvarsområder
High performance multicrystalline silicon: Grain structure and iron precipitation
Impurity control in high performance multicrystalline silicon
Influence of grown-in defects on final oxygen precipitates during heat treatment of Cz-Si wafer analyzed by a coupled model with the interaction of point defects, oxygen precipitates, and dislocation loops
To illuminate the role of crystal growth process on final oxygen precipitates during heat treatment of Cz-Si wafer, a coupled model, including the interaction of oxygen precipitates, point defects, and dislocation loops, has been used to test the influence of grown-in defects generated during crysta...
Grain boundary effect on lifetime in high performance multicrystalline silicon during solar cell processing
High performance multicrystalline silicon wafers used in solar cell processing have been investigated with focus on quantification of the grain boundary effect on lifetime. The lifetime of a set of 16 wafers from different positions along the ingot and after different process steps – phosphorus gett...
The effect of heating power on impurity formation and transport during the holding phase in a Bridgman furnace for directional solidification of multi-crystalline silicon
Oxygen and carbon are the most common impurities in multi-crystalline silicon. The general mechanism for formation and transport of O and C in the solidification furnace is as follows: oxygen from the silica crucible comes into the melt and combines with a silicon atom and evaporates at the gas/melt...
Sistruc: A microstructure model for optimization of silicon materials
SPH based modelling of oxide and oxide film formation in gravity die castings
Gravity die casting is an important casting process which has the capability of making complicated, high-integrity components for e.g. the automotive industry. Oxides and oxide films formed during filling affect the cast product quality. The Smoothed particle hydrodynamics (SPH) method is particular...
Modelling of micro- and macrosegregation for industrial multicomponent aluminium alloys
Realistic predictions of macrosegregation formation during casting of aluminium alloys requires an accurate modeling of solute microsegregation accounting for multicomponent phase diagrams and secondary phase formation. In the present work, the stand alone Alstruc model, a microsegregation model for...
A model study of the impact of the transport of inoculant particles on microstructure formation during solidification
We investigate the impact of the convective transport of inoculant particles on the distribution of the final microstructure (grain size) in grain-refined aluminum-alloy castings. We carry out numerical simulations of a casting experiment, considering the solidification of an Al–22 wt.%Cu alloy inoc...