Lubricities of Super Fine SiO₂ Particle as a Solid Lubricant

Investigating the effects of particle size and dosage of talc nanoparticles as a novel solid collector in quartz flotation

In this study, hydrophobic talc nanoparticles were applied as a novel class of solid flotation collector. The aim of this work was to understand the effect of talc nanoparticles size and dosage on the quartz flotation recovery. X-ray analysis, dynamic light scattering, and scanning electron microscopy were conducted. Flotation tests were performed in modified a Hallimond flotation cell. The Zet...

Microstructural and Chemical Analysis of AgI Coatings Used as a Solid Lubricant in Electrical Sliding Contacts

AgI coatings have been deposited by electroplating on Ag plated Cu coupons. Electron microscopy shows that the coatings consist of weakly agglomerated AgI grains. X-ray diffraction, differential scanning calorimetry, thermogravimetry and mass spectrometry show that the AgI exhibits a reversible transformation from hexagonal to cubic phase at 150 °C. AgI starts to decompose at 150 °C with an acc...

Alkyl Benzene as a Compressor Lubricant

0 Bcc 4 He as a Coherent Quantum Solid : ” Super - Solid ” ?

In this work we investigate the quantum nature of bcc 4 He. We show that it is a solid phase with an Off-Diagonal Long Range Order of coherently oscillating local electric dipole moments. These dipoles arise from the correlated zero-point motion of the atoms in the crystal potential, which oscillate in synchrony so that the dipolar interaction energy is minimized. This coherent state has a thre...

Cryogenic friction behavior of PTFE based solid lubricant composites

Solid lubricants used in aerospace applications must provide low friction and a predictable operation life over an extreme range of temperatures, environments and contact conditions. PTFE and PTFE composites have shown favorable tribological performance as solid lubricants. This study evaluates the effect of temperature on the friction coefficient of neat PTFE, a PTFE/ PEEK composite and an exp...