Paper Title:
Fracture Toughness of SiC-Cu Based Alloys Cermets
  Abstract

Ceramic materials exhibit very low fracture toughness, which limits their applications. Recently, metal-ceramic composites have been developed to achieve improvements in toughness. In this work, the fracture toughness of SiC-Cu based alloys cermets, obtained by reactive infiltration, was measured at room temperature using the single edge notched beam (SENB) method. Values up to 11 MPam1/2 were obtained; these values were compared with the fracture toughness of commercial materials. The results of fracture toughness were directly related with the amount of the infiltrated metallic phase. The fracture energy was calculated using values of KIC and Young Modulus obtained from four points bending tests. Differences on toughness values were related with porosity and type of fracture of the several systems. The microstructural analysis of the fracture surfaces was carried out by scanning electron microscopy. The role of different operating toughening mechanisms; such as crack deflection, bridging, branching, and energy dissipation through microcracking and/or microplasticity; has been examined.

  Info
Periodical
Materials Science Forum (Volumes 498-499)
Edited by
Lucio Salgado and Francisco Ambrozio Filho
Pages
350-356
DOI
10.4028/www.scientific.net/MSF.498-499.350
Citation
S. Ordoñez, L. Carvajal, V. Martínez, C. Agurto, J. Marín, L. Olivares, I. Iturriza, "Fracture Toughness of SiC-Cu Based Alloys Cermets", Materials Science Forum, Vols. 498-499, pp. 350-356, 2005
Online since
November 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Ivo Dlouhý, Zdeněk Chlup, Aldo Roberto Boccaccini
Abstract:A number of examples exist that indicate the potential for increasing the toughness of brittle matrices by dispersing different...
115
Authors: Norihito Tanaka, Tohru Sekino, Tadachika Nakayama, Yamato Hayashi, Takafumi Kusunose, Koichi Niihara
Abstract:Y-TZP/TiNi composites were successfully fabricated by reductive sintering process. Mechanical properties of Y-TZP / TiNi composites were much...
366
Authors: Ke Wang, Pascal Ogier, Chauhari Wuiwui Tjiu, Chaobin He
Abstract:Alumina nano-crystals were dispersed in epoxy resin via different approaches. The effects of filler dispersion on the mechanical properties...
233
Authors: Qian Feng, Shao Ming Dong, Yu Sheng Ding, Qing Zhou, Akira Kohyama
Abstract:Chopped fiber and a hybrid reinforcement of chopped and continuous fibers were used for fabricating SiC/SiC composites. Under the selected...
1257
Authors: R. Khorshidi, M. Emamy, A. Honarbakhsh Raouf
Abstract:The present research is undertaken to study the influence of Li on the tensile properties of Al-15%Mg2Si metal matrix composite. The tensile...
1052