| Texto completo | |
| Autor(es): |
Leal, Gabriela
[1]
;
Cazalini, Elisa M.
[1, 2]
;
Costa, Daniel S.
[1]
;
Cardoso, Guilherme W. A.
[1]
;
Motta Junior, Jose Andre
[1]
;
Gomes, Mariany L. M.
[1]
;
Messmer, Nigel R.
[1]
;
Brazil, Tayra R.
[1]
;
Giacomelli, Valderci J.
[1]
;
Rezende, Mirabel C.
[1]
Número total de Autores: 10
|
| Afiliação do(s) autor(es): | [1] Univ Fed Sao Paulo, Sci & Technol Inst, Rua Talim 330, Sao Jose Dos Campos, SP - Brazil
[2] Technol Inst Aeronaut, Plasma & Proc Lab, Praca Marechal Eduardo Gomes 50, Sao Jose Dos Campos, SP - Brazil
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | MATERIALS RESEARCH EXPRESS; v. 5, n. 10 OCT 2018. |
| Citações Web of Science: | 0 |
| Resumo | |
Synthetic graphite presents unique and differentiated properties (low coefficient of thermal expansion, low modulus, low density, and especially increased mechanical strength) at high temperatures (up to 2700 degrees C), which makes it suitable for use in the aerospace area. To meet these strict requirements, the importance of synthetic graphite increases as the working temperature becomes more severe and the characteristics of other materials are not adequate. In the present study, three different samples of synthetic graphite were characterized by structural, electrical, morphological, and mechanical analyses. The correlation of the results shows that the graphite with lower crystallographic ordering, smaller pores, and regions richer in mosaic and isotropic structures had both the highest compression strength and electrical resistivity, when it was evaluated by Raman spectroscopy, x-ray diffraction, polarized light optical microscopy, and scanning electron microscopy analyses. These results lead to the conclusion that graphite with smaller pores and richer particles with lower structural ordering is more suitable for aerospace application. The other samples (with better structural ordering and less electrically resistive) have potential application in devices that require better electrical characteristics. The correlation of morphological, structural, electrical, and mechanical results of this study supports graphite selection for aerospace application. (AU) | |
| Processo FAPESP: | 13/17045-7 - Fabricação e caracterização de sensores piezorresistivos baseados em filmes finos de DLC |
| Beneficiário: | Gabriela Leal |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |