Control of composition gradient in a metal-ceramic functionally graded material manufactured by the centrifugal method

• Published in: Composites. Part A, Applied science and manufacturing Vol. 29; no. 5; pp. 595 - 601
• Main Authors: Watanabe, Yoshimi, Yamanaka, Noboru, Fukui, Yasuyoshi
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 1998; Elsevier
• Subjects: Applied sciences; C. computational modelling; centrifugal method; Dispersion hardening metals; E. casting; Exact sciences and technology; functionally graded material; Metals. Metallurgy; Powder metallurgy. Composite materials; Production techniques; viscous liquid; E. casting; centrifugal method; C. computational modelling; viscous liquid; functionally graded material; Viscous liquid; Particle size; Volume fraction; Centrifugal force; Modeling; Composite material; Dispersion strengthened metal; Functionaly gradient material; Concentration gradient
• ISSN: 1359-835X; 1878-5840
• DOI: 10.1016/S1359-835X(97)00121-8

The motion of ceramic particles in a molten metal of a viscous liquid under a centrifugal force is numerically modeled to study the formation process of composition gradients. The simulated results are in good agreement with those of experiments that used a plaster-corundum model functionally graded material (FGM). It is found that greater gradients are obtained in cases of thinner thickness, greater applied centrifugal forces and smaller mesh size particles. In addition, the processing of mixed mesh size particles is examined. We conclude that the use of a mixture of particle sizes is particularly useful to control the composition of metal-ceramic FGMs manufactured by the centrifugal method.