Paper Title:
Fracture Toughness Enhancements through Stress Shielding in Functionally Graded SiC-TiC Composites
  Abstract

It is often the case that the low fracture toughness of polycrystalline ceramics limit the load-bearing capabilities of components made from such materials. In an effort to improve the fracture toughness of a SiC-TiC composite material, a novel stress-shielding approach was adopted so as to reduce the effective mode I stress intensity around a crack tip within the composite body. To this end, a series of functionally graded materials were produced, with samples having a preselected spatial SiC-TiC composition variation. The spatial composition variation within each sample was set up according to one of several exponential mathematical functions. In this way the resultant spatial variation in thermal expansion coefficients was also controlled through the thickness of the material, and a particular stress and strain distribution could be tailored within the body. Samples with tailored near-surface compressive stress states showed a significant improvement in c KI , as measured by means of a flexure test, in comparison with stress-free samples of a homogeneous composition corresponding to the composition found at the test-point within the gradient materials.

  Info
Periodical
Edited by
J. Dusza, R. Danzer and R. Morrell
Pages
129-134
DOI
10.4028/www.scientific.net/KEM.290.129
Citation
J. H. Liversage, D. S. McLachlan, M. Herrmann, "Fracture Toughness Enhancements through Stress Shielding in Functionally Graded SiC-TiC Composites", Key Engineering Materials, Vol. 290, pp. 129-134, 2005
Online since
July 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: Xiao Man Du, Qin Fu Liu, Hong Fei Cheng
Abstract:The kaolinite-potassium acetate composite was prepared by the immersion method. The intercalation composites were characterized by means of...
1220
Authors: Li Hong Zhao, Jian Rong Hu, Bei Hai He
Chapter 1: Material Engineering and its Application
Abstract:In this work, the effects of potassium acetate(KAc) intercalation on particle size and viscosity of delaminated kaolin were investigated. It...
59
Authors: Liu Dan Luo, Hai Yi Huang, Jian Hong Bi, Lang Lang Tan, Hua Zhang, Di Zhang
Chapter 10: Automation, Optimization, Algorithms in Manufacturing and Industry Application
Abstract:Response surface methodology (RSM) was utilized to optimize the best adsorbent conditions on Malachite Green in wastewater by the activated...
611