Experimental investigation of the stability of particulate dispersoid suspensions in aluminium and magnesium meltsKevorkijan, Varužan (Avtor) , Inštitut za kovinske materiale in tehnologije (Lastnik avtorskih pravic) metal matrix compositesparticle reinforcementinterfacechemically activated wettingThe rejection of Si3N4,Mg3N2, AlN and Si particles from different slurries consisting of molten aluminum and magnesium alloy with 10% of silicon or pure molten metals was experimentally investigated by measuring changes in the electrical resistance of the slurries before and after rejection occurred. In stirring experiments, only individual powder fractions which passed through a 45 µm sieve screen and remained on a 30 µm screenwere applied. The experiments showed that the rejection of Si3N4 particles from Al-10%Si and Mg-10%Si melts occurs when more than 17-18 vol.% of the ceramic phase is dispersed into the melt, while in pure Al and Mg molten metals spontaneous rejection occurs at 7-8 vol.% of the introduced ceramic phase. A similar tendency of rejection (at 16-18 vol.% of particulate in slurry) was also observed during the introduction of silicon particles into Al-10%Si and Mg-10%Si melts.20002012-06-01 13:44:45Znanstveno delo28071ISSN: 1580-2949UDK: 669.018.95:669.71:669.721OceCobissID: 106193664COBISS_ID: 6044694ISSN pri članku: 1580-2949NUK URN: URN:SI:UM:DK:G6WQ2SADsl