Development of Dry Coating Technology for Automotive Parts

Sugawara, Hiroyoshi

doi:10.4139/sfj.68.671

Cited by 3 publications

(1 citation statement)

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“…The second strategy involves "high-pressure fuel injection" in engines [10]. Injecting a small amount of fuel at high pressure results in finer atomization, enhancing combustion efficiency.…”

Section: Introductionmentioning

confidence: 99%

Effect of Water on Wear of DLC Coatings in high temperature and pressurized Ethanol

Horikawa,

Mimata,

Umehara

et al. 2024

Preprint

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This study investigates the impact of moisture and dissolved oxygen on the wear behavior of a-C:H:Si coatings in high-temperature high-pressure ethanol-water conditions. Friction and wear tests were conducted on hydrogenated amorphous carbon (a-C:H) and silicon-containing a-C:H:Si coatings under varying moisture levels (0 vol.%, 6 vol.%) and dissolved oxygen conditions (N2, O2 10 MPa) at 120°C. The results revealed distinct wear responses between a-C:H and a-C:H:Si coatings. Under O2 pressure, a-C:H coatings showed minimal change in wear with increasing moisture levels, while a-C:H:Si coatings exhibited a notable doubling in wear, indicating higher susceptibility to moisture. Auger electron spectroscopy analysis confirmed that a-C:H:Si coatings underwent surface oxidation with increased moisture, leading to significant changes in elemental composition. Additionally, atomic force microscopy scratch tests revealed surface softening in a-C:H:Si coatings, particularly under moisture conditions. The study suggests that moisture induces surface reactions in a-C:H:Si coatings, resulting in increased wear, providing insights into the wear mechanisms influenced by moisture and dissolved oxygen in ethanol-water environments.

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Section: Introductionmentioning

confidence: 99%

Effect of Water on Wear of DLC Coatings in high temperature and pressurized Ethanol

Horikawa,

Mimata,

Umehara

et al. 2024

Preprint

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Formation of diamond-like carbon film using high-power impulse magnetron sputtering

et al. 2019

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Effect of pulse width on deposition of diamond-like carbon on high-power pulsed magnetron sputtering

Ohta

Matsushima

Kunitsugu

et al. 2023

Jpn. J. Appl. Phys.

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A diamond-like carbon (DLC) film was deposited using high-power pulsed magnetron sputtering (HPPMS). The effect of pulse width on the deposition of DLC film was investigated under constant peak power density or average power density to clarify the densification mechanism of DLC film. The maximum hardness of 25 GPa analyzed by nanoindentation was obtained using Ar gas without negative substrate bias voltage at pulse width 30 µs and peak power density of 1.5 kW/cm2. The flux and energy of C+ and Ar+ incident to the DLC film was evaluated by using energy-resolved and time-resolved mass spectrometry to clarify the relation between the input power to the target and behavior of produced ions. The change in hardness is well correlated with ion flux ratio C+/Ar+. This result indicates that a flux and energy of Ar+ as well as C+ is key parameter to characterize the microstructure of DLC film.

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Development of Dry Coating Technology for Automotive Parts

Cited by 3 publications

References 0 publications

Effect of Water on Wear of DLC Coatings in high temperature and pressurized Ethanol

Effect of Water on Wear of DLC Coatings in high temperature and pressurized Ethanol

Formation of diamond-like carbon film using high-power impulse magnetron sputtering

Effect of pulse width on deposition of diamond-like carbon on high-power pulsed magnetron sputtering

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