Micromechanical models are developed to explore the effect of embedded metal layers upon thermal cycling delamination failure of thermal barrier coatings (TBCs) driven by thickening of a thermally grown oxide (TGO). The effects of reductions in the steady-state (i.e. maximum) energy release rate (ERR) controlling debonding from large interface flaws and decreases in the thickening kinetics of T...

BACKGROUND Triester glycerol oxide gel (Protefix® Queisser Pharma, Germany) is a new topical agent that has the property of adherence to the oral mucosa by forming a lipid film which protects against mechanical trauma and may help to reduce oral tissue moisture loss and inflammation. The aim of this clinical trial was to determine the efficacy of a topical TGO gel and to also compare it with tr...

We have developed a new type of surface enhanced Raman scattering (SERS) substrate with thiolated graphene oxide (tGO) nanosheets sandwiched between two layers of closely packed plasmonic nanoparticles. The trilayered substrate is built up through alternative loading of interfacially assembled plasmonic nanoparticle arrays and tGO nanosheets, followed by coating the nanoparticle surfaces with p...

1. INTRODUCTION Drosophila bHLH-PAS proteins play important roles in development and physiology. They can be divided into three groups: (i) Tgo and its bHLH-PAS dimerization partners, (ii) circadian rhythms, and (iii) hormone function. The Tgo dimerization group carries-out many developmental roles, and includes: Dysfusion (Dys), Similar (Sima), Single-minded (Sim), Spineless (Ss), and Tracheal...

The thermomechanical properties of thermal barrier coatings (TBCs) such as elastic modulus, thermal conductivity, and coefficient of thermal expansions are determined by pores, cracks, and splat boundaries, which affect the thermoelastic properties of thermally grown oxide (TGO) layer and the fracture behavior in TBCs. The thermoelastic characteristics thus have been investigated through mathem...

A thermal barrier system with plasma-sprayed thermal barrier coating (TBC) has been analyzed subject to thermal cycling. The thermally grown oxide (TGO) is allowed to grow at the peak temperature in the cycle, with both thickening and lateral components of the growth strain. The stresses in the TGO are also allowed to relax at high temperature when they attain a critical level. The bond coat is...

The cyclic displacement instability exhibited by a thermally grown oxide (TGO) in a thermal barrier system has been simulated using a scheme that embodies large-scale thickening. The investigation has three main objectives. (i) A sensitivity study that probes the influence of the thermo-mechanical properties of the bond coat. It uses properties that closely resemble those relevant to actual bon...