Metalização mecânica com Ti de placas de Al2O3 utilizando máquina ferramenta computadorizada para brasagem metal/cerâmica
In this work employed the mechanical metallization technique to produce a thin film of titanium in the ceramic substrate of alumina (Al2O3), in order to favor wetting with conventional adding alloys. Was used an automated process with employment a machine tool computer numerical control (CNC) wit...
Na minha lista:
| Autor principal: | |
|---|---|
| Outros Autores: | |
| Formato: | doctoralThesis |
| Idioma: | por |
| Publicado em: |
Brasil
|
| Assuntos: | |
| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/21413 |
| Tags: |
Adicionar Tag
Sem tags, seja o primeiro a adicionar uma tag!
|
| Resumo: | In this work employed the mechanical metallization technique to produce a thin film of
titanium in the ceramic substrate of alumina (Al2O3), in order to favor wetting with
conventional adding alloys. Was used an automated process with employment a
machine tool computer numerical control (CNC) without operator intervention.
Subsequently, the metallized ceramic was brazed with metallic stainless steel tube 304,
by indirect technique in high-vacuum oven, using conventional alloying addition Ag-
28Cu. The resulting interface was characterized by technique of micro structural
analysis using scanning electron microscopy (SEM) coupled with energy dispersive
spectroscopy (EDS) for chemical microanalysis and mechanical performance, shear test,
carried out on a universal testing machine. The titanium metallization film was observed
by electron microscopy showing an interface with good interaction between the
elements of the materials involved, and the thickness of the layer of titanium fairly
regular, consistent with results in the same work area. While brazing interface presented
some defects, mainly due to the furnace atmosphere and vacuum pressure, which has
not reached the specified value, identified in other studies, which influenced, to some
extent, the mechanical results. |
|---|