Artigo
Correlative light-electron fractography of interlaminar fracture in a carbon-epoxy composite
Registro en:
Microscopy And Microanalysis: The Official Journal Of Microscopy Society Of America, Microbeam Analysis Society, Microscopical Society Of Canada, p. 1-7, 2015.
1435-8115
10.1017/S143192761501538X
26514911
Autor
Hein, Luis Rogerio de O. [UNESP]
Campos, Kamila A. de [UNESP]
Resumen
This work evaluates the use of light microscopes (LMs) as a tool for interlaminar fracture of polymer composite investigation with the aid of correlative fractography. Correlative fractography consists of an association of the extended depth of focus (EDF) method, based on reflected LM, with scanning electron microscopy (SEM) to evaluate interlaminar fractures. The use of these combined techniques is exemplified here for the mode I fracture of carbon-epoxy plain-weave reinforced composite. The EDF-LM is a digital image-processing method that consists of the extraction of in-focus pixels for each x-y coordinate in an image from a stack of Z-ordered digital pictures from an LM, resulting in a fully focused picture and a height elevation map for each stack. SEM is the most used tool for the identification of fracture mechanisms in a qualitative approach, with the combined advantages of a large focus depth and fine lateral resolution. However, LMs, with EDF software, may bypass the restriction on focus depth and present enough lateral resolution at low magnification. Finally, correlative fractography can provide the general comprehension of fracture processes, with the benefits of the association of different resolution scales and contrast modes. Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Materials Imaging Lab,Department of Materials and Technology, Faculty of Engineering at Guaratinguetá,UNESP - Universidade Estadual Paulista,Av. Ariberto Pereira da Cunha 333,Guaratinguetá,SP 12516-410,Brazil. Materials Imaging Lab,Department of Materials and Technology, Faculty of Engineering at Guaratinguetá,UNESP - Universidade Estadual Paulista,Av. Ariberto Pereira da Cunha 333,Guaratinguetá,SP 12516-410,Brazil.