TY - GEN
T1 - Variations in sintering stress and viscosity with mixing ratio of metal/ceramic powders
AU - Shinagawa, Kazunari
PY - 2010
Y1 - 2010
N2 - Distortions or cracking in metal/ceramic graded powder compacts during sintering may be caused by the variation in densification behavior of the layers with different mixing ratios. To clarify the constitutive response of the heterogeneous powder compacts, a micromechanics model for sintering is proposed. The sintering stress as well as the viscosity of the powder mixtures is expressed by using Eshelby's equivalent inclusion method and Mori-Tanaka's mean-field theory. The variation in sintering behavior with metal/ceramic mixing ratio computed by the proposed model is compared with the experimental data for Ni/Al2O3 system. The present model can reproduce the decrease in sintering rate of the powder mixtures, which remarkably appears in the Ni/Al2O3 powder compacts with small amount of Al 2O3.
AB - Distortions or cracking in metal/ceramic graded powder compacts during sintering may be caused by the variation in densification behavior of the layers with different mixing ratios. To clarify the constitutive response of the heterogeneous powder compacts, a micromechanics model for sintering is proposed. The sintering stress as well as the viscosity of the powder mixtures is expressed by using Eshelby's equivalent inclusion method and Mori-Tanaka's mean-field theory. The variation in sintering behavior with metal/ceramic mixing ratio computed by the proposed model is compared with the experimental data for Ni/Al2O3 system. The present model can reproduce the decrease in sintering rate of the powder mixtures, which remarkably appears in the Ni/Al2O3 powder compacts with small amount of Al 2O3.
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U2 - 10.1002/9780470599730.ch16
DO - 10.1002/9780470599730.ch16
M3 - Conference contribution
AN - SCOPUS:77955353876
SN - 9780470408490
T3 - Ceramic Transactions
SP - 161
EP - 170
BT - Advances in Sintering Science and Technology - A Collection of Papers Presented at the International Conference on Sintering
PB - American Ceramic Society
T2 - Advances in Sintering Science and Technology - International Conference on Sintering 2008
Y2 - 16 November 2008 through 20 November 2008
ER -