Chemical analysis of wear tracks on magnetic disks by TOF-SIMS

Numata, Toshimitsu; Nanao, Hidetaka; Mori, S.; Miyake, Shojiro

doi:10.1016/s0301-679x(02)00202-5

Cited by 23 publications

(10 citation statements)

References 5 publications

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“…It also has excellent mass resolution for a wide variety of chemical species, including hydrogen and carbon, which make up the bulk of these NFC films. TOF-SIMS has already been used by researchers to determine the failure mechanisms of carbon overcoats and thin lubricant films used on magnetic storage media [12,13]. Fukui et al [14] used TOF-SIMS to determine the chemistry of transfer layers in relation to the friction and wear behavior of a hydrogenated DLC film after tests in ambient air [14].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Initial and Steady-State Sliding Behavior of a Nearly Frictionless Carbon Film by Imaging 2- and 3-D TOF-SIMS

Eryilmaz

Erdemir

2007

Tribol Lett

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Using imaging time-of-flight secondary ion mass spectrometry (TOF-SIMS), we investigated the initial and steady-state sliding behavior of a nearly frictionless carbon (NFC) film. Specifically, TOF-SIMS images (both 2-D and 3-D) of these surfaces were constructed to highlight the spatial distributions of ionized and molecular species that were present on as-received and friction-tested NFC surfaces and as a function of depth. As a complementary technique, we used X-ray photoelectron spectroscopy (XPS) to gain further insight into the chemical nature of the sliding surfaces. The NFC films were produced on Si wafers and steel substrates in a gas discharge plasma that consisted of 25 vol.% methane and 75 vol.% hydrogen using a plasmaenhanced chemical vapor deposition (PECVD) system. They were then subjected to sliding friction and wear experiments in a pin-on-disk machine under 5-and 10-N loads and at sliding velocities of 0.2-0.5 m/s in dry nitrogen. The initial friction coefficients of the NFC films were in the range of 0.05-0.1, but decreased rapidly to values less than 0.01 at steady state. Positive and negative TOF-SIMS spectra and 2-and 3-D images reconstructed from selected masses revealed that the elemental distribution of certain chemical species differs substantially between undisturbed and tribo-tested areas of the NFC films. Specifically, the tribo-tested areas are essentially made up of carbon and hydrogen, while undisturbed or as-received areas are covered by a layer that is rich in oxygen and other species. These findings correlate well with the initial and steady-state friction coefficients of these films and help further explain their superlubricity in inert test environments.

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Section: Introductionmentioning

confidence: 99%

Investigation of Initial and Steady-State Sliding Behavior of a Nearly Frictionless Carbon Film by Imaging 2- and 3-D TOF-SIMS

Eryilmaz

Erdemir

2007

Tribol Lett

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“…Recently, time-of-flight secondary ion mass spectroscopy (TOF-SIMS) was introduced as a sophisticated surface analysis technique for tribological surfaces [15][16][17][18][19][20][21][22][23]. The outline of the analysis is based on mass spectrum of compounds which exist on the surfaces.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Tribo-chemistry by means of Stable Isotopic Tracers: TOF-SIMS Analysis of Langmuir–Blodgett Films and Examination of their Tribological Properties

et al. 2005

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Deuterium-substituted and 13 C-substituted octadecanoic acids were applied to study tribo-chemistry of binary-component Langmuir-Blodgett film deposited on Si(100) surfaces. Time-of-flight secondary ion mass spectroscopy was employed to study structure of the film. The isotopic tracers give typical fragment ions composed of the isotopes. Among these typical fragment ions, we paid attention to quasi-molecular ions and deuterium ion as ''fingerprint region'' of the film structure. The tribological properties of the binary-component film were evaluated by ball-on-plate type tribo-testers. The combination of octadecanol with octadecanoic acid affords good tribological properties, whereas the combination of octadecylamine with the acid gave poor results. The surface analysis of the plate after the tribo-test revealed that the alcohol and the acid were retained on the track even after the rubbing. On the other hand simultaneous removal of the acid and the amine from the surfaces were observed. Interactions between the acid and the amine were considered by the results of the tribo-tests and the surface analysis of the binary-component film.

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“…In this study, the DLC coatings were deposited with filtered cathodic vacuum arc (FCVA) system with chromium interlayer. The FCVA technique produces high quality coatings and argon plasma generated by FCVA was used for substrate etching . The present work deals with the microstructure, tribology and adhesion strength of DLC coatings deposited on argon pretreated stainless steel and WC‐Co substrates.…”

Section: Introductionmentioning

confidence: 99%

Argon plasma treatment on metal substrates and effects on diamond‐like carbon (DLC) coating properties

Wasy

Balakrishnan

Lee

et al. 2013

Crystal Research and Technology

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The diamond like carbon coatings (DLC) of 400 nm thickness was deposited by filtered cathodic vacuum arc system. The argon plasma etched and non‐etched tungsten carbide‐cobalt (WC‐Co) and stainless steel (SUS) were used as substrates. The chromium was deposited as an interlayer for diamond like carbon coatings on the etched and non‐etched WC‐Co and SUS substrates. The present research is to evaluate the effect of argon plasma etching of the substrates on microstructure, tribology and adhesion strength of DLC coatings. The films were characterized by field emission scanning electron microscopy, Raman spectroscopy, tribology and scratch tests. The Raman studies showed the broad peak ∼1550 cm−1 indicates the formation of amorphous carbon or diamond‐like carbon. It was found that the DLC coatings on the plasma etched substrates of WC‐Co and SUS have shown the low friction coefficient of ∼0.12–0.14. The DLC coatings on plasma etched substrates of WC‐Co have better adhesion strength. The results showed that the argon plasma etching of substrate reduces the surface roughness to ∼2.5 nm, resulting in smooth morphology, good adhesion and wear resistance as compared to DLC coating on non‐etched substrates. The scanning electron microscopic studies showed that the DLC coated specimens with plasma etched substrates have minimum damage as compared to the DLC coated non etched substrates.

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Chemical analysis of wear tracks on magnetic disks by TOF-SIMS

Cited by 23 publications

References 5 publications

Investigation of Initial and Steady-State Sliding Behavior of a Nearly Frictionless Carbon Film by Imaging 2- and 3-D TOF-SIMS

Investigation of Initial and Steady-State Sliding Behavior of a Nearly Frictionless Carbon Film by Imaging 2- and 3-D TOF-SIMS

Investigation of Tribo-chemistry by means of Stable Isotopic Tracers: TOF-SIMS Analysis of Langmuir–Blodgett Films and Examination of their Tribological Properties

Argon plasma treatment on metal substrates and effects on diamond‐like carbon (DLC) coating properties

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