In a continuous fiber reinforced brittle matrix composite, the transverse fracture is often dominated by the crack trapping and bridging effects as well as the fiber breakage. In this article, the toughening effect of flat fiber bundles with the cross-sectional aspect ratio, , ranging from 0.05 to 5 is discussed in the context of energy analysis. With a constant size/spacing ratio of the fiber ...

Microstructural evolution and deformation mechanisms of magnetron sputtered V-Si-N coatings with various Si contents are investigated by transmission electron microscopy, X-ray absorption spectroscopy, ab initio calculations. A small amount atoms was dissolved into the cubic VN lattice, locally reducing neighboring V-N p-d hybridization near site. The content found to impact architecture coatin...

Methods to improve the fracture toughness and strength of glassy materials are increasingly important for a variety applications that remain limited by restrictions brittleness surface defect propensity. Here, we report on enhancement glass mechanical performance through combination tailored chemistry irradiation post-treatment. Specifically, show both experiments atomistic simulations (crack) ...

Strength and toughness of A l 2 O 3 based ceramics were improved by d i spers ing ZrO,(Y,O,) and nonoxide mate r ia l s such a s Sic , Tic, TiN and B&. S ign i f ican t toughening and hardening were a t t a i n e d i n A1203-Zr0,-Sic and Al,O,-Zr0,-Tic composites.