Determination of corundum, spinel and aluminium nitride in scum on aluminium alloy melt by an X-ray diffractometric method combined with selective dissolution.
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Refining grain structure and porosity of an aluminium alloy with intensive melt shearing
Intensive melt shearing was achieved using a twin-screw machine to condition an aluminium alloy prior to solidification. The results show that intensive melt shearing has a significant grain-refining effect. In addition, the intensive melt shearing reduces both the volume fraction and the size of porosity. It can reduce the density index from 10.50% to 2.87% and the average size of porosity in ...
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T h e prepara t ion and propert ies of combined a luminium oxide coatings have been investigated. T h e coating has been prepared in two steps. First , a luminium subs t ra te was anodically oxidized. In t he next s tep the anodized film has been coated by the sol-gel method . T h e condit ions of forming coatings wi thout shrinkage were obta ined empirically. It was found out t h a t the film ...
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ژورنال
عنوان ژورنال: BUNSEKI KAGAKU
سال: 1995
ISSN: 0525-1931
DOI: 10.2116/bunsekikagaku.44.97