SiC particle distribution in castings made from composite suspension A359/SiCp with various casting conditions
Łukasz Bernat, Jacek Jackowski, Paweł Szymański
Quarterly No. 3, 2015 pages 168-173
DOI:
keywords: metal matrix composite, microstructure, gradient structure, casting composite
abstract The paper presents results of an evaluation of the reinforcing phase particles in identical test castings of small overall dimensions, obtained from a composite suspension in diversified casting conditions. The composite suspension behavior has been studied in different casting conditions: gravitational, gravitational aided by subatmospheric pressure and under centrifugal force. The beneficial influence of the factors intensifying the process of filling mold cavities with a composite suspension was found. Gravitational casting of the composite suspension is limited by the size of the casting modules - in the analyzed experiment conditions they cannot be lower than 1.4 mm. In the castings obtained using subatmospheric pressure, uniform distribution of the reinforcing phase particles was found. Additionally, highly diversified particle distribution was observed in castings from a suspension subjected to centrifugal forces.