Abstract The interest in inorganic foundry binders has been rising steadily recent times due to their favorable environmental characteristics. This paper compares the mold quality and cast attained with different binders. Three types of sand five were used for study. Of binders, there was liquid sodium silicate hardening methods, a geopolymer binder, also solid silicate. assessed through bendin...

STATEMENT OF PROBLEM Crowns cemented on short implant abutments may have insufficient retention. PURPOSE The purpose of this study was to evaluate the effect of circumferential grooves on the retention of cemented cast copings on implant abutments. MATERIAL AND METHODS Sixty similarly-shaped implant abutments were divided into 4 groups (n=15): without grooves, with 1 groove, with 2 grooves,...

a comprehensive review of fatigue behavior and fatigue design of heavy section wind turbine castings made of ductile iron en-gjs-400-18-lt is performed. common metallurgical defects that are affecting fatigue behavior of this material were studied. review of different researches on quantitative effect of chunky graphite and micro structure on fatigue behavior of en-gjs-400-18-lt was performed. ...

Abstract Aim and Objective The main aim of this study was to evaluate the effect three different types pattern materials on vertical marginal accuracy complete cast crown. Material Methods Three groups 20 specimens each were made based materials, that is, blue inlay wax, autopolymerizing acrylic resin, light cure resin. Castings examined using stereo microscope for discrepancy. Results result s...

Cast irons are known to be easy shape by sand casting due their high eutectic fraction. Despite this fact, together with cost benefits, obtaining good quality castings is not an task, although it depends on the level of defects allowed in each case. Casting here reviewed and classified into three classes according main origin: (1) related mixtures used make molds; (2) associated mold design geo...