Wetting behaviour of SiC ceramics with Dy2O3/Al2O3 additive system

• Grant number: 12/01177-9
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: March 01, 2012
• End date: August 31, 2012
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Transformation Metallurgy
• Principal Investigator: Sebastião Ribeiro
• Grantee: Juliana Alves da Silva
• Host Institution: Escola de Engenharia de Lorena (EEL). Universidade de São Paulo (USP). Lorena , SP, Brazil

Abstract

Ceramics made of silicon carbide, SiC, have many applications in engineering due to their excellent mechanical, thermal, and chemical properties. For the production of SiC ceramics with specific properties for each application, the processing must be chosen in a way to produce appropriate microstructures. For this reason, in most cases, SiC ceramics are exposed to a liquid phase sintering, using an aluminum oxide mixture and some rare earth such as Al2O3/Y2O3, Al2O3/Sm2O3, and Al2O3/E2O3 as additives formers for this phase. The main property these sintering additives must have is wettability, in other words, they must present a low contact angle. Along with this characteristic, the liquid made approximates the SiC particles and also consolidates them within a significant velocity, besides producing microstructures with excellent mechanical properties. The aim of this project is to study the wetting behavior of another rare earth oxide to be used as a former of the liquid phase sintering for SiC.(AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DA SILVA, J. A.; MORESCHI, B. M.; GARCIA, G. C. R.; RIBEIRO, S.. Wettability of silicon carbide ceramic by Al2O3/Dy2O3 and Al2O3/Yb2O3 systems. JOURNAL OF RARE EARTHS, v. 31, n. 6, p. 634-638, JUN 2013. (10/51925-6, 12/01665-3, 12/01177-9)