Thermal damage to corundum refractory

Conclusions We studied the resistance of corundum refractory during thermal-impact loadings and showed that the weakening of the material due to the action of thermal stresses may be assessed both from its residual strength and also from data for the rate of dissemination of ultrasonic oscillations and acoustic emissions, recorded during the tests. It is shown that during tests of the thermal-shock resistance of relatively brittle (<1) refractories they should be assessed not only with regard to the variations in temperature causing a fall in strength (as is normally done) but also with respect to the variations in temperature causing the start of microdestruction in the material.Translated from Ogneupory, No. 3, pp. 16–19, March, 1984.     

Corrosion-mechanical failure of silicon nitride ceramic under the action of salts

Institute of Strength Problems, Academy of Sciences of the Ukrainian SSR, Kiev. Translated from Problemy Prochnosti, No. 7, pp. 76–80, July, 1989.     

“Brick‐and‐Mortar” Self‐Assembly Approach to Graphitic Mesoporous Carbon Nanocomposites

Mesoporous carbon materials do not have sufficient ordering at the atomic scale to exhibit good electronic conductivity. To date, mesoporous carbons having uniform mesopores and high surface areas have been prepared from partially‐graphitizable precursors in the presence of templates. High temperature thermal treatments above 2000 °C, which are usually required to increase conductivity, result in a partial or total collapse of the mesoporous structures and reduced surface areas induced by growth of graphitic domains, limiting their applications in electric double layer capacitors and lithium‐ion batteries. In this work, we successfully implemented a “brick‐and‐mortar” approach to obtain ordered graphitic mesoporous carbon nanocomposites with tunable mesopore sizes below 850 °C without using graphitization catalysts or high temperature thermal treatments. Phenolic resin‐based mesoporous carbons act as mortar to highly conductive carbon blacks and carbon onions (bricks). The capacitance and resistivity of final materials can be tailored by changing the mortar to brick ratios.     

Electrowetting on polyimide and silicon substrates with high hysteresis

Microsystem Technologies - Electrowetting-on-dielectric (EWOD) with atypical liquid-substrate combinations has growing utility for a range of microfluidic devices. However, there are challenges to...