Stiction analysis of magnetic tapes

Review of Scientific Instruments

1997

Section: Resultsmentioning

confidence: 97%

Localized surface elasticity measurements using an atomic force microscope

DeVecchio

Review of Scientific Instruments

1997

“…Now Prfz j , Z < z j Äzg from equation (13) is used in equation (11) to obtain p(z j ). A statistical program is developed to calculate the PDF using this algorithm, and graphic software is used to plot the standardized PDF.…”

Section: Algorithm To Generate the Probability Density Function (Pdf)mentioning

confidence: 99%

Modelling of surfaces with a bimodal roughness distribution

Peng

Proceedings of the Institution of Mechanical Engineers, Part J:

2000

Most contact analyses assume that the surface heights and peak (summit) height distributions follow a single modal distribution, Gaussian or non-Gaussian. However, height distributions of many surfaces follow multi-modal distributions. In this study, for the first time, algorithms are developed to generate various bimodal surfaces on the computer. Statistical analyses and contact analyses of these surfaces have been carried out. The present algorithms are applied to particulate tapes and head-finishing processes to illustrate the effect of the bimodal distribution on the contact performance. From these analyses, an optimum bimodal roughness distribution is predicted for minimum friction and wear.

“…Chilamakuri and Bhushan [14] and Bhushan et al [15] found that surfaces with a slight positive skewness and a kurtosis larger than 4 lead to an optimum surface with minimum contact area and meniscus force. The X-ray photoelectron spectrum of worn digital ME tape after the pause test at 22 8C and 45 per cent RH is shown in Fig.…”

Section: Surface Analysis For Head and Tapes In The Pause Testmentioning

confidence: 99%

Durability and failure mechanisms of digital tapes in a rotary tape drive

Proceedings of the Institution of Mechanical Engineers, Part J:

2001

The durability and failure mechanism of digital metal-evaporated (ME) and digital metal particulate (MP) tapes were investigated. Shuttle and pause mode tests were performed at ambient and different environmental conditions using a modified digital camcorder as a wear tester. Physical and chemical analyses of worn surfaces were conducted to study failure mechanisms. Digital ME tape exhibited higher overall durability than digital MP tape and Hi-8 ME tape without a diamond-like carbon (DLC) overcoat in the study. The performance of digital ME tape was sensitive to temperature and relative humidity. In the pause test, digital ME tape demonstrated highest durability under hot and moderate humidity conditions and lowest durability under cold and dry conditions. The reasons for high durability for digital ME tape compared with digital MP tape and Hi-8 ME tape without a DLC overcoat lie in lubricant selection, controlled surface topography and DLC coating. With the correct combinations of these three parameters, the durability of ME tape is vastly improved.