Micro-texturing of DLC Thin Film Coatings and its Tribological Performance Under Dry Sliding Friction for Microforming Operation

Shimizu, Tetsuhide; Kakegawa, Tai; Yang, Ming

doi:10.1016/j.proeng.2014.10.251

Cited by 29 publications

(26 citation statements)

References 13 publications

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“…Due to their potential tribological applications, segment-structured surfaces have drawn much attention in recent years [1–6]. It is well known that the patterning of tribological coatings can further enhance the wear performance of an engineering surface.…”

Section: Introductionmentioning

confidence: 99%

“…However, increasing tribological demands of modern industries has pushed the segmented DLC film development to its limits. Furthermore, the fabrication of small segments using metal meshes as masks is difficult to apply on three-dimensional substrate shapes, and complex and costly procedures are needed [1, 4, 6]. To overcome these limitations, it may be possible to obtain a quasi-patterned surface by introducing porosity, which can have a tribological function similar to that of the segmented surfaces described above.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tribological and thermal stability study of nanoporous amorphous boron carbide films prepared by pulsed plasma chemical vapor deposition

Liza

Ohtake

Akasaka

et al. 2015

Science and Technology of Advanced Materials

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In this work, the thermal stability and the oxidation and tribological behavior of nanoporous a-BC:H films are studied and compared with those in conventional diamond-like carbon (DLC) films. a-BC:H films were deposited by pulsed plasma chemical vapor deposition using B(CH3)3 gas as the boron source. A DLC interlayer was used to prevent the a-BC:H film delamination produced by oxidation. Thermal stability of a-BC:H films, with no delamination signs after annealing at 500 °C for 1 h, is better than that of the DLC films, which completely disappeared under the same conditions. Tribological test results indicate that the a-BC:H films, even with lower nanoindentation hardness than the DLC films, show an excellent boundary oil lubricated behavior, with lower friction coefficient and reduce the wear rate of counter materials than those on the DLC film. The good materials properties such as low modulus of elasticity and the formation of micropores from the original nanopores during boundary regimes explain this better performance. Results show that porous a-BC:H films may be an alternative for segmented DLC films in applications where severe tribological conditions and complex shapes exist, so surface patterning is unfeasible.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tribological and thermal stability study of nanoporous amorphous boron carbide films prepared by pulsed plasma chemical vapor deposition

Liza

Ohtake

Akasaka

et al. 2015

Science and Technology of Advanced Materials

View full text Add to dashboard Cite

show abstract

“…Based on this evaluation, the effect of the texture size on the dry friction and wear performance were discussed. It has been experimentally proven that surface texturing works to improve the friction characteristics by promoting discharge of abrasion powder at the contact interface [13,14]. To verify the tribological effect in micro forming processes, a micro bending test with in-situ observation system was performed by using the textured DLC coating on the die surface.…”

Section: Micro-texturing Of Dlc Thin Film Coatings For Surface Treatmmentioning

confidence: 99%

An integrated precise engineering for micro forming

Yang

Shimizu

et al. 2018

MATEC Web Conf.

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An integrated precise engineering was proposed and developed to push the micro metal forming technology to higher level for manufacturing micro metallic devices in this study. A textured Diamond Liked Carbon (DLC) coating was applied to micro die for improving tribological performance. Highenergy assisted processes, such as die-embedded localize heating and ultrasonic vibration systems were developed to improve formability of micro materials and accuracy of processes. The results show that .the integrated precise engineering solved the issues due to the size effects, and improved very much the tribological properties, formability of work materials and accuracy of product. Furthermore, the integrated precise engineering was applied in micro forming to manufacturing a micro metallic pump which realized commercialization.

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“…Throughout the deposition, Substrate bias voltage was maintained at -1 kV. Conditions of whole process above were summarised in Table 5 ( Shimizu et al, 2014). To fabricate micro-textured structure, metallic mesh was placed on the substrate as a masking plate during the DLC deposition.…”

Section: Surface Coating For Micro Die With Texted Dlcmentioning

confidence: 99%

“…Source: Shimizu et al (2014) To investigate cause of this difference in friction properties, the wear tracks of DLC films and the counterparts of SUJ2 balls are observed, as shown in Figure 14. The largest width of the wear track is shown for the non-textured DLC films, whereas the textured-80 µm films indicate the smallest.…”

Section: Surface Coating For Micro Die With Texted Dlcmentioning

confidence: 99%

Novel processes and related technologies for micro metal forming

Yang

Shimizu

2017

IJMPT

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Abstract:Processes with high energy assistance, such as ultrasonic vibration or local heating, and automatic assembly system in a progressive die were developed for micro metal forming in order to improve process accuracy of micro product due to some size effects in this study. Furthermore, application of textured diamond liked carbon (DLC) coating on die surface was attempted to improve the tribological performance for dry micro forming operations.

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Micro-texturing of DLC Thin Film Coatings and its Tribological Performance Under Dry Sliding Friction for Microforming Operation

Cited by 29 publications

References 13 publications

Tribological and thermal stability study of nanoporous amorphous boron carbide films prepared by pulsed plasma chemical vapor deposition

Tribological and thermal stability study of nanoporous amorphous boron carbide films prepared by pulsed plasma chemical vapor deposition

An integrated precise engineering for micro forming

Novel processes and related technologies for micro metal forming

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