Lubricant State Evaluation of Ultraviolet-Irradiated Magnetic Disk Using Lateral Friction Force Modulation Microscopy with Electric Current Distribution

Abstract

In this paper, we present a micro flow sensor from a polymer based on the thermal anemometric principle. A sensor with outer dimensions of 5.5 × 6 × 1.2 mm 3 and a small fluidic channel with a cross-section of 240 μm × 400 μm may be operated with both gases (up to 200 ml min −1 ) and liquids (for water up to 200 μl min −1 ). Due to its small heat capacity, the sensor is also suitable for dynamical measurements of liquid flows, e.g. flow pulsations up to several 100 Hz even within high-pressure hydraulic systems.

Investigation of micro-electro-mechanical processing characteristics of layered boron nitride and carbon films

“…The microprocessing properties (electrical conductivity and frictional property) of the 4 nm period (C/BN) n and (BN/C) n multilayer films were investigated by lateral modulation friction force microscopy (LM-FFM) as described in [11,12,15,18,20]. Nanoprocessing was conducted using frictional force between the tip and the sample [18,19,[21][22][23][24].…”

Nanowear studies of PFPE lubricant on magnetic perpendicular recording DLC-film-coated disk by lateral oscillation test

“…This is thought to because free lubricants remained in the valleys after dipcoating. This enables the supply of free lubricant [17,18]. The tests were conducted at a loading speed of 6.7 N/s, a maximum load of 120 N and a 1 • angle between the indenter and the sample.…”

“…A lateral modulation friction force microscope (LM-FFM) technique, as an application of AFM, has been used to measure friction, surface topography and viscoelasticity [12][13][14][15][16]. The direct LM-FFM observations of lubricant films were performed to investigate the tribological characteristics of a perpendicular magnetic recording disk coated with a PFPE lubricant [13,17,18].…”

Improving the Friction Durability of Magnetic Head-Disk Interfaces by Thin Lubricant Films

“…Understanding the dynamic behavior of lubricants on magnetic disks can clarify the lubrication mechanism at the head-disk interface. Scanning probe microscopies such as atomic force microscopy (AFM) have proven useful for this purpose [10][11][12][13][14]. The lubricating properties of lubricant-coated magnetic disks and dynamics of the lubricants behavior can be evaluated by force modulation AFM [10][11][12].…”

“…The lubricating properties of lubricant-coated magnetic disks and dynamics of the lubricants behavior can be evaluated by force modulation AFM [10][11][12]. Deformation before and after nanowear testing and the state of the lubricant can also be evaluated [13,14]. Lateral force modulation friction testing can evaluate the effect of a lubricant's retention and replenishment on its nanowear properties.…”