Solidification analysis of AMMCs with ceramic particles

• Autorzy: Dolata-Grosz A. , Dyzia M. , Śleziona J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: In the research work the result of the reinforcement displacement and solidification analysis for aluminium cast composites with ceramic particles have been presented. The results of research on the solidification process are compared for the applied aluminium matrix alloy (AlSi12CuNiMg2), for composites containing glass carbon particles (Cg) and heterophase reinforcement (mixture of silicon carbide (SiC)+glass carbon particles (Cg)). Design/methodology/approach: The course of the solidification process was recorded by means of a system which enabled continuous control and measurement of the metal temperature during solidification of the composite suspension. The system was equipped with a thermoelectric cup core QC4080, with an incorporated thermocouple of K type (NiCr-Ni). The application of disposable thermoelectric cup cores of identical heat abstraction coefficient and known, standardized dimensions, ensured identical conditions and rate of heat abstraction during the cooling of the castings. The structure analysis for composite casts was performed by means of optical and scanning microscopy. Findings: The research has shown, that ceramic particles have an influence on temperature change and the time of aluminium matrix alloy solidification. The changes results, first of all, from disparate physical properties of the glassy carbon particles and silicon carbide particles used (thermal conductivity, mass density), compared to aluminium matrix alloy. Practical implications: Ceramic particles decrease shrinkage of the casting and change the nature of its crystallization. Originality/value: Employment of glass carbon particles for matrix reinforcement allows to get flotation in the aluminium alloy. Employment of heterophase reinforcement (glass carbon and silicon carbide particles) allows to get segregation of particles: flotation as well as sedimentation in the matrix, which results in the occurrence of a layered structure.

Słowa kluczowe

EN

composites; casting; solidification analysis; silicon carbide; glass carbon particles

PL

kompozyty; odlewnictwo; analiza krzepnięcia; węglik krzemu; węgiel szklisty

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2007
• Tom: Vol. 28, nr 7
• Strony: 401--404
• Opis fizyczny: Bibliogr. 19 poz., il., wykr.

Twórcy

autor

Dolata-Grosz A.

autor

Dyzia M.

autor

Śleziona J.

• Department of Alloys and Composite Materials Technology, Silesian University of Technology, Faculty of Materials Science and Metallurgy, ul. Krasińskiego 8, 40-019 Katowice, Poland,

Bibliografia

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