Načini preprečevanja raztapljanja neravnotežnih trdnih faz v večfaznih mešanicah s talino
Prevention of dissolving of inequilibrial solid primary phases in semisolid mixtures

slovenian

1999

volume 33, issue 5

Aluminij Mostar    aluminum 

Inštitut za kovinske materiale in tehnologije

A processing model for production of particle reinforced metal matrix composites was developed. This process solves the problem of reinforcing phase wettability and variations of the phase fractions are also enabled. A semisolid composite mixture, produced in the proposed way, contains two or more primary solid phases, which are in general thermodinamically incompatible or at least inequilibrial with respect to their compositions and fractions. Since these solid faces are the essential part of the composite, their dissolution has to be prevented. In our processing model this is possible in more different ways: -kinetically, -by chemical protection of solid primary phases and -by thermodynamical stabilisation of the semisolid composite. The choicea depends on the desired chemical composition and microstructure of the composite and on expected technologies in further processing of the composite.

16.09.2009