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Mohammed Mhamdi

Forskningsleder

Mohammed Mhamdi

Forskningsleder

Mohammed Mhamdi
Telefon: 982 83 949
Mobil: 982 83 949
Avdeling: Industriell prosessteknologi
Kontorsted: Oslo

Publikasjoner og ansvarsområder

Publikasjoner

Publikasjon

Grain boundary effect on lifetime in high performance multicrystalline silicon during solar cell processing

https://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1374593

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...

Forfattere Adamczyk Krzysztof Søndenå Rune Mhamdi Mohammed Autruffe Antoine Stokkan Gaute Di Sabatino Marisa
År 2016
Type Tidsskriftsartikkel
Publikasjon

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

https://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1375141

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...

År 2016
Type Tidsskriftsartikkel
Publikasjon

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

https://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1364112

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...

Forfattere Ellingsen Kjerstin Lindholm Dag Mhamdi Mohammed
År 2016
Type Tidsskriftsartikkel
Publikasjon

Modelling of micro- and macrosegregation for industrial multicomponent aluminium alloys

https://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1292298

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...

Forfattere Ellingsen Kjerstin Mortensen Dag Mhamdi Mohammed
År 2015
Type Tidsskriftsartikkel
Publikasjon

SPH based modelling of oxide and oxide film formation in gravity die castings

https://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1301066

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...

År 2015
Type Tidsskriftsartikkel
Publikasjon

A model study of the impact of the transport of inoculant particles on microstructure formation during solidification

https://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1247708

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...

Forfattere Bedel Marie Tveito Knut Omdal Založnik Miha Combeau Hervé Mhamdi Mohammed
År 2015
Type Tidsskriftsartikkel
Publikasjon

A novel method for gas flow and impurity control in directional solidification of multi-crystalline silicon

https://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1155621

In this paper the potential of a specially designed argon gas injector for controlling the gas flow and transport of impurities in directional solidification of multi-crystalline silicon is evaluated. The gas injector which consists of a valve allows one to control the flow direction independently i...

Forfattere Bellmann Martin Lindholm Dag Mhamdi Mohammed
År 2014
Type Tidsskriftsartikkel
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