Analysis of Pressureless Sintering with Spherical, Ellipsoidal and Cylindrical Rigid Inclusions
Pressureless sintering of a ceramic matrix with a single rigid inclusion is analyzed by a viscoelastic finite element method. The ceramic matrix is assumed to be viscoelastic, and the sintering potential used in the analysis is derived from sintering experiments on the unconstrained matrix material. It is recognized that the free strain rate for a material point in the constrained matrix during sintering is generally different from that of the pure matrix experiencing the same sintering process. Three different inclusion shapes (spherical, ellipsoidal and cylindrical) are considered in the analysis. The densification rates of the sintering matrix are found to be affected significantly by the inclusion shape. The single cylindrical inclusion model serves as an upper bound of constraints of single inclusion models and has potential for use in simulating a whisker reinforced ceramic matrix composite.
L. R. Dharani and W. Hong, "Analysis of Pressureless Sintering with Spherical, Ellipsoidal and Cylindrical Rigid Inclusions," Journal of Materials Processing and Manufacturing Science, Elsevier, Jan 1994.
Mechanical and Aerospace Engineering
Article - Journal
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