28-52 CARACTERIZAREA LIANTULUI FOLOSIT PENTRU FORMAREA PRIN INJECŢIE A MATERIALELOR COMPOZITE CU MATRICE DIN ALUMINIU ŞI PARTICULE DE CARBURĂ DE SILICIU ŞI GRAFIT
CHARACTERIZATION OF BINDER UTILIZED FOR INJECTION MOLDING OF ALUMINIUM MATRIX COMPOSITE WITH GRAPHITE AND SILICON CARBIDE PARTICLES
Powder Injection moulding is considered a novel technique for the manufacture of complex shape samples of ceramic or metal powders. It consists in: powder mixing with a binder, injection into a form; binder removal, and sintering. Injection moulding technology is characterized by high stability and productivity. It makes possible to use uncomplicated and inexpensive equipment. The most important for a binding agent is to be thin to reduce the force of attraction between solid particles of different sizes in order to reduce the viscosity. By adding a small quantity of binder it should provide a good formation of the mixture, ready for separation of the preform to retain the shape and strength of injection moulded sample. The sample is quickly removed and does not contaminate the carbon material contained in waste, or other products.
Keyword: binder, injection moulding, sintering, preform
Cuvinte cheie: liant, formare prin injecţie, sinterizare, preformă