Go to:
Logótipo
Comuta visibilidade da coluna esquerda
Você está em: Start > Publications > View > Evaluation of Functionally Graded Ceramic Crucible for Induction Melting of TiAl Based Alloys
Publication

Publications

Evaluation of Functionally Graded Ceramic Crucible for Induction Melting of TiAl Based Alloys

Title
Evaluation of Functionally Graded Ceramic Crucible for Induction Melting of TiAl Based Alloys
Type
Article in International Conference Proceedings Book
Year
2013
Authors
Gomes, F
(Author)
Other
The person does not belong to the institution. The person does not belong to the institution. The person does not belong to the institution. Without AUTHENTICUS Without ORCID
Barbosa, J
(Author)
Other
The person does not belong to the institution. The person does not belong to the institution. The person does not belong to the institution. View Authenticus page Without ORCID
Carlos Silva Ribeiro
(Author)
FEUP
View Personal Page You do not have permissions to view the institutional email. Search for Participant Publications View Authenticus page Without ORCID
Conference proceedings International
Pages: 769-774
6th International Materials Symposium (MATERIALS 2011)/15th Meeting of SPM
Guimaraes, PORTUGAL, APR 18-20, 2011
Indexing
Other information
Authenticus ID: P-005-3PW
Abstract (EN): During the last years a very significant effort to develop a melting crucible for induction melting of Ti based alloys at competitive cost has been carried out by many researchers, where the authors are included. Results obtained so far have shown that no material accomplishes the melting crucibles two main demands: inertness facing titanium alloys and suitable/enough thermal-shock resistance. Until now, yttrium and calcium oxides were those materials that performed best on what concerns to thermodynamic stability. However, in both cases, crucibles thermal-shock resistance was very poor, and there are references to crucibles that cracked during melting. Besides, calcium oxide reveals manipulation problems, due to its high higroscopicity. This paper concerns to the evaluation of zircon based crucibles with Y2O3 inner layer for induction melting of TiAl based alloys. A novel multi layered crucible production technique based in a centrifugally assisted slip casting process followed by a sintering operation is described, and results concerning to crucibles porosity and wall composition and morphology are presented. Crucibles obtained in different processing conditions were used to melt a Ti48Al alloy which was poured in graphite moulds. Experimental results include alloy chemical contamination with residual elements, mainly yttrium and oxygen, microhardness measurement and the presence of yttrium oxide and zircon inclusions in the cast samples. Results concerning to the crucibles behaviour are also presented with particular attention to cracks development. The Y2O3 crucible layer was found to suffer some erosion and be slightly dissolved by the molten alloy and the extent of those phenomena depends on the porosity of the layer surface, for fixed experimental melting conditions.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 6
Documents
We could not find any documents associated to the publication.
Related Publications

Of the same authors

Induction melting of gamma-TiAl in CaO crucibles (2008)
Article in International Scientific Journal
Gomes, F; Barbosa, J; Carlos Silva Ribeiro
Aluminium Evaporation During Ceramic Crucible Induction Melting of Titanium Aluminides (2013)
Article in International Conference Proceedings Book
Gomes, F; Barbosa, J; Carlos Silva Ribeiro
Recommend this page Top
Copyright 1996-2025 © Faculdade de Direito da Universidade do Porto  I Terms and Conditions  I Acessibility  I Index A-Z
Page created on: 2025-07-10 at 08:33:49 | Privacy Policy | Personal Data Protection Policy | Whistleblowing