Investigação da Interface Metal-Porcelana da Liga Ni-Cr-Mo Soldada a LASER
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Data
2008-04-01
Autores
Ricardo Teixeira Ernesto, Vivian Aparecida [UNESP]
Guastaldi, Antonio Carlos [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Associação Brasileira de Soldagem (ABS)
Resumo
The interface formed between the metal and the porcelain of a LASER welded Ni-Cr-Mo alloy was studied. The characterization was carried out through optical microscopy, scanning electron microscopy, X-ray dispersive spectroscopy-EDS and mechanical testing by three-point flexion test-TPE in the region LASER welded with and without the porcelain. The porcelain adhesion with the alloy alone is possible after the oxidation of the metallic surface and subsequent application of an adhesive called opaco. The applied porcelain, on the base metal and fusion zone presented some distinct behaviors. After the TPF test the base metal presented fractures while that in the fusion zone was completely gone. One noticed that the region submitted to the LASER welding showed less porcelain adhesion than the region of the base metal due to the microestructural refinement of the fusion zone. These results can be evidenced by the EDS of the studied regions. The TPF had demonstrated that the Ni-Cr-Mo alloy submitted to the LASER welding, undergone significant alterations in its mechanical properties after the application of the porcelain.
Descrição
Palavras-chave
metalo-ceramic prostheses, Ni-Cr-Mo alloy, laser beam welding
Como citar
Soldagem & Inspecao. São Paulo: Assoc Brasil Soldagem, v. 13, n. 2, p. 111-117, 2008.