Michael K. Cinibulk

TL;DR: In this paper, a review of crack deflecting coatings for fiber-reinforced ceramic composites is presented, and the implications on the design of coatings and of composite systems using alternative coatings are discussed.

TL;DR: In this paper, the authors used high-resolution electron microscopy (HREM) to study grain-boundary intergranular films in different Si[sub 3]N[sub 4] ceramics.

TL;DR: Direct atomic resolution images have been obtained that illustrate how a range of rare-earth atoms bond to the interface between the intergranular phase and the matrix grains in an advanced silicon nitride ceramic to critically improve the materials' performance in wide-ranging applications.

TL;DR: In this paper, high-resolution electron microscopy and nano-beam analytical electron microscope were used to characterize both the intergranular silicate film thickness and its local composition in a series of high-purity Si3N4 ceramics doped with 0.450 at. ppm Ca.

TL;DR: The fabrication and intergranular phase devitrification of silicon nitride densified with rare-earth oxide additives has been investigated in this paper, where the addition of the oxides of Sm, Gd, Dy, Er, and Yb, having high melting points and behaving similarly to Y2O3, were compositionally controlled to tailor a microstructure with a crystalline secondary phase of RE2Si2O7.