Engineered CVD Diamond Coatings for Machining and Tribological Applications

Dumpala, Ravikumar; Chandran, Maneesh; Rao, M. S. Ramachandra

doi:10.1007/s11837-015-1428-2

Cited by 40 publications

(19 citation statements)

References 131 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3. Besides, many other researchers also found that diamond films can significantly improve the tribological performance of substrates [33][34][35][36]. Composed by nontoxic carbon, nano-crystalline diamond also shows wonderful biocompatibility and hemocompatibility [37,38].…”

Section: Discussionmentioning

confidence: 99%

Improving the long-term stability of Ti6Al4V abutment screw by coating micro/nano-crystalline diamond films

Xie

Zhou

Wei

et al. 2016

Journal of the Mechanical Behavior of Biomedical Materials

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

Improving the long-term stability of Ti6Al4V abutment screw by coating micro/nano-crystalline diamond films

Xie

Zhou

Wei

et al. 2016

Journal of the Mechanical Behavior of Biomedical Materials

View full text Add to dashboard Cite

“…Murakami's reagent was used to attack the WC grains and roughen the substrate surface together. Caro's acid oxidizes the binder to soluble Co 2+ compounds, thus decreasing the surface cobalt content [23].…”

Section: Depositing Chemical Vapor Deposition (Cvd) Diamond Coatingmentioning

confidence: 99%

Influence of Adhesive Strength, Fatigue Strength and Contact Mechanics on the Drilling Performance of Diamond Coating

Liu

2020

Materials

View full text Add to dashboard Cite

Adhesive strength of the coating significantly affects the lifetime of the coating. However, it is still inevitable for the coating, even with strong adhesive strength, to peel off from the substrate after working for a while. In this work, fatigue and wear behaviors were employed to analyze the effect on the mechanics of coating and contribute to a fundamental understanding of peeling of the coating. A small-size Co-cemented tungsten carbide drill bit was selected as the examined substrate to fabricate the diamond coating. Roughening pretreatment with a diamond slurry combined with ultrasonic vibration was performed for the substrate surface to enhance adhesive strength. Meanwhile, a diamond coating without roughening pretreatment was also fabricated for comparison. The lifetime and quality of the coating were evaluated by the drilling test. Although the diamond coating could grow on the substrates with and without roughening pretreatment, the diamond coating with roughening pretreatment possessed a higher lifetime and stronger wear resistance than that without roughening pretreatment. We found that both substrates with and without roughening pretreatment exhibited a coarse surface, whereas the roughening pretreatment could remove the original machined surface of the substrate and thus make the near surface with numerous integrated crystalline grains become the new topmost surface. This increased the contact area and surface energy of the interface, leading to the improvement of adhesive strength. Finally, fatigue strength and contact mechanics were studied to trace the changes in the stress of the diamond coating in the whole process of drilling from a theoretical point of view. We suggest that fatigue strength and contact mechanics may play vital roles on the durability and peeling of the coating.

show abstract

“…Diamond coatings (DCs) produced by chemical vapor deposition (CVD) on tungsten carbide WC-Co cutting tools allow a great improvement in the tool performance by extending its lifetime, increasing the machining speed, and providing a better quality of the machined material [1]. The application of bilayered or multilayered micro-and nanocrystalline DCs further enhances the cutting tools' functional properties [2,3]. The upper nanocrystalline layer provides low roughness and low friction coefficient, as well as high bending strength [4].…”

Section: Introductionmentioning

confidence: 99%

Morphology of Diamond Layers Grown on Different Facets of Single Crystal Diamond Substrates by a Microwave Plasma CVD in CH4-H2-N2 Gas Mixtures

et al. 2017

View full text Add to dashboard Cite

Epitaxial growth of diamond films on different facets of synthetic IIa-type single crystal (SC) high-pressure high temperature (HPHT) diamond substrate by a microwave plasma CVD in CH 4 -H 2 -N 2 gas mixture with the high concentration (4%) of nitrogen is studied. A beveled SC diamond embraced with low-index {100}, {110}, {111}, {211}, and {311} faces was used as the substrate. Only the {100} face is found to sustain homoepitaxial growth at the present experimental parameters, while nanocrystalline diamond (NCD) films are produced on other planes. This observation is important for the choice of appropriate growth parameters, in particular, for the production of bi-layer or multilayer NCD-on-microcrystalline diamond (MCD) superhard coatings on tools when the deposition of continuous conformal NCD film on all facet is required. The development of the film morphology with growth time is examined with SEM. The structure of hillocks, with or without polycrystalline aggregates, that appear on {100} face is analyzed, and the stress field (up to 0.4 GPa) within the hillocks is evaluated based on high-resolution mapping of photoluminescence spectra of nitrogen-vacancy NV optical centers in the film.

show abstract

Engineered CVD Diamond Coatings for Machining and Tribological Applications

Cited by 40 publications

References 131 publications

Improving the long-term stability of Ti6Al4V abutment screw by coating micro/nano-crystalline diamond films

Improving the long-term stability of Ti6Al4V abutment screw by coating micro/nano-crystalline diamond films

Influence of Adhesive Strength, Fatigue Strength and Contact Mechanics on the Drilling Performance of Diamond Coating

Morphology of Diamond Layers Grown on Different Facets of Single Crystal Diamond Substrates by a Microwave Plasma CVD in CH4-H2-N2 Gas Mixtures

Contact Info

Product

Resources

About