Characterization of change of carbon bonding due to sliding wear damage by scanning Auger microscopy

Abstract

The alteration of carbon bonding resulting from the continuous frictional heating between a magnetic head slider and a rotating thin film rigid disk has been investigated. This change of carbon bonding from diamondlike amorphous carbon phase to graphite phase was inspected by Scanning Auger Microscopy (SAM). As near and direct contact recording are being considered for future high density disk drives, this phase transformation of the protective carbon overcoating could result in failure of the head-disk interface.

Barrier coating for polymer light-emitting diodes using carbon nitride thin films deposited at low temperature by PECVD technique

“…Interest in carbon-nitrogen compounds gained impetus after works in the 1980s [7,8], which predicted excellent mechanical properties for carbon nitrides designed as h-C 3 N 4 , with a bulk modulus even greater than for diamond. Indeed, carbon nitride films produced with vapor phase synthesis methods showed low friction and high wear resistance [9][10][11][12][13][14], and proved to be excellent barriers for water and oxygen permeation, analogously to silicon nitride [15]. Nevertheless, carbon nitride films have not been explored as barrier coatings for materials or electronic devices, in which the permeation of water and/or oxygen appears as an obstacle for commercial application.…”

Wear-induced modifications of amorphous carbon in the presence of magnetic media

“…7 Frictional heating has been proposed as one cause. 8 Flash temperature studies of asperities indicate temperatures on the order of several hundred degrees Celsius. 9 Calorimetry studies indicate that amorphous carbon transforms into graphite over a higher temperature range ͑700-3000°C͒.…”