In high power electronics packaging, sintered silver nanoparticle joints suffer from thermal-humidity- electrical-chemical joint driven corrosion in extreme environments. this paper, we conducted aging tests on nanoparticles under high-temperature, high-humidity, and high-sulphur conditions. The results show that: (1) the sample dry conditions at a temperature exhibited highest degree of sulphi...

We report a unique tribological system that produces superlubricity under boundary lubrication conditions with extremely little wear. This system is a thin coating of hydrogen-free amorphous Diamond-Like-Carbon (denoted as ta-C) at 353 K in a ta-C/ta-C friction pair lubricated with pure glycerol. To understand the mechanism of friction vanishing we performed ToF-SIMS experiments using deuterate...

Biology implements intriguing structural design principles that allow for attractive mechanical properties—such as high strength, toughness, and extensibility despite being made of weak and brittle constituents, as observed in biomineralized structures. For example, diatom algae contain nanoporous hierarchical silicified shells, called frustules, which provide mechanical protection from predato...

Cellulosic insulating paper is the essential component of insulation in power transformers. Under thermal stress inside transformer, cellulosic degrades and generates formic acid. Meanwhile, presence acid further accelerates aging process paper. This study takes cellulose molecule composed D-glucose as research object. The ReaxFF reactive force field applied to simulate high-temperature During ...

We describe the application of the ReaxFF reactive force field with short-range distance-dependent exponential inner wall corrections and the non-adiabatic electron Force Field (eFF) for studying the hypervelocity impact (HVI) effects on material properties. In particular, to understanding nonequilibrium energy/mass transfer, high strain/heat rate material decomposition, defects formation, plas...

The degradation of indene is investigated using molecular dynamics (MD) with the ReaxFF force field and RRKM theory. Microcanonical rate constants are obtained over a broad energy range (8–25 eV). There agreement between results calculations at lower energies, while larger higher energies. At energies there also values by expressions for photodegradation polyaromatic hydrocarbons from literatur...

The effects of applying external electric fields on the coefficient friction a selected elastomer during mechanical interaction with steel and copper surface oil (counter samples) immersed in pin-on-disc setup were studied investigated. synthetic base oils used PAG 68 PAO 6. for study is commonly manufacture rotary lip seals. During investigations, viscosity tested was also experimentally deter...