Mechanical properties of Cr-alloyed MoSi2-based nanocomposite coatings with a hierarchical structure

Hard Nanocomposite Coatings , Their Structure and Properties

Synergistic toughening of hard, nacre-mimetic MoSi2 coatings by self-assembled hierarchical structure

Like many other intermetallic materials, MoSi2 coatings are typically hard, but prone to catastrophic failure due to their low toughness at ambient temperature. In this paper, a self-assembled hierarchical structure that closely resembles that of nacre (i.e., mother of pearl) was developed in a MoSi2-based coating through a simple, yet cost-effective, depostion technique. The newly formed coati...

Nanocomposite Based Multifunctional Coatings

Synthesis, structure, and mechanical properties of silica nanocomposite polyrotaxane gels

A significantly soft and tough nanocomposite gel was realized by a novel network formed using cyclodextrin-based polyrotaxanes. Covalent bond formation between the cyclic components of polyrotaxanes and the surface of silica nanoparticles (15 nm diameter) resulted in an infinite network structure without direct bonds between the main chain polymer and the silica. Small-angle X-ray scattering re...

Transparent Pullulan/Mica Nanocomposite Coatings with Outstanding Oxygen Barrier Properties

This study presents a new bionanocomposite coating on poly(ethylene terephthalate) (PET) made of pullulan and synthetic mica. Mica nanolayers have a very high aspect ratio (α), at levels much greater than that of conventional exfoliated clay layers (e.g., montmorillonite). A very small amount of mica (0.02 wt %, which is ϕ ≈ 0.00008) in pullulan coatings dramatically improved the oxygen barrier...