Paper Title:
The Effect of Particle Migration on the Creep-Rate of Nanocomposites
  Abstract

The tensile creep behaviour of a mullite-SiC nanocomposite containing 5 vol% of SiC particles deformed under stresses from 4 to 50 MPa at 1400 °C has been studied. After grain-size effects had been accounted for, the creep-rate of the nanocomposite was found to be approximately 30× less than that of the monolithic mullite. It is suggested that this reduction is caused not by a threshold stress but by the extra work required to drive diffusion in the low diffusivity SiC particles so that they can move with the grain boundaries during creep. A model is presented which predicts the rate of creep under these conditions and gives reasonable agreement with the experiments at low stresses.

  Info
Periodical
Key Engineering Materials (Volumes 317-318)
Edited by
T. Ohji, T. Sekino and K. Niihara
Pages
445-448
DOI
10.4028/www.scientific.net/KEM.317-318.445
Citation
J.E. Pitchford, E. Lidén, S. Gustafsson, L.K.L. Falk, E. Carlström, W.J. Clegg, "The Effect of Particle Migration on the Creep-Rate of Nanocomposites", Key Engineering Materials, Vols. 317-318, pp. 445-448, 2006
Online since
August 2006
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: Hidehiro Yoshida, Katsuyuki Matsunaga, Takahisa Yamamoto, Yuichi Ikuhara
299
Authors: K. Salama, G. Majkic, U.(Balu) Balachandran
Abstract:In this paper we review a number of studies of stress-induced diffusional matter transport in perovskites, with an emphasis on creep studies...
43
Authors: Claudinei dos Santos, Kurt Strecker, M.J.R. Barboza, Francisco Piorino Neto, Olivério Moreira Macedo Silva, Cosme Roberto Moreira Silva
Abstract:Commercial α−Si3N4, Al2O3 and a mixed yttrium and rare earth oxides, RE2O3, were used as starting-powders. Powder batches were milled using...
667
Authors: Marie Kvapilova, Vaclav Sklenička, Jiří Dvořák, Petr Král
Abstract:Our earlier published creep data are analyzed for ultrafine-grained pure aluminium and copper processed by equal-channel angular pressing...
382
Authors: Li Hua Zhan, Yan Guang Li, Ming Hui Huang, Jian Guo Lin
Materials Processing Technology
Abstract:In order to study the similarities and dissimilarities between creep and stress relaxation behavior of age formed aluminum alloys, both creep...
772