Early stages of diamond growth on substrates with different carbon diffusivity

Inzoli, Fabio; Dellasega, David; Russo, Valeria; Ghezzi, F.; Passoni, M.

doi:10.1016/j.diamond.2017.09.019

Cited by 5 publications

(4 citation statements)

References 52 publications

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“…Inzoli et al found that through a direct-current micro-plasma device, nanocrystalline diamond could be produced on various substrates, even on ferrous materials [42,43]. Using their device, without substrate pre-treatment or interlayer deposition, a continuous nanocrystalline diamond with ballas-like morphology was found on iron substrate after 1 h deposition, and no delamination occurred after substrate cooling.…”

Section: Special Controls Of Deposition Processmentioning

confidence: 99%

“…Through their method, the problem that the diamond films suffered from poor adhesion on steel substrates due to the formation of initial soft graphitic layers was solved. In addition, Henda et al reported that nanocrystalline diamond films could deposit by pulsed electron Inzoli et al found that through a direct-current micro-plasma device, nanocrystalline diamond could be produced on various substrates, even on ferrous materials [42,43]. Using their device, without substrate pre-treatment or interlayer deposition, a continuous nanocrystalline diamond with ballas-like morphology was found on iron substrate after 1 h deposition, and no delamination occurred after substrate cooling.…”

Section: Special Controls Of Deposition Processmentioning

confidence: 99%

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Diamond Deposition on Iron and Steel Substrates: A Review

et al. 2020

Micromachines

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This article presents an overview of the research in chemical vapor deposition (CVD) diamond films on steel substrates. Since the steels are the most commonly used and cost-effective structural materials in modern industry, CVD coating diamond films on steel substrates are extremely important, combining the unique surface properties of diamond with the superior toughness and strength of the core steel substrates, and will open up many new applications in the industry. However, CVD diamond deposition on steel substrates continues to be a persistent problem. We go through the most relevant results of the last two and a half decades, including recent advances in our group. This review discusses the essential reason of the thick catalytic graphite interlayer formed on steel substrates before diamond deposition. The high carbon diffusion in iron would induce severe internal carburization, and then voluminous graphite precipitated from the substrate. In order to hinder the catalytic graphite formation, various methods have been applied for the adherent diamond film deposition, such as pre-imposed various interlayers or multi-interlayers, special controls of the deposition process, the approaches of substrate alloying and so on. We found that adherent diamond films can be directly deposited on Al alloying steel substrates, and then the role of Al alloying element was examined. That is a thin dense amorphous alumina sublayer in situ formed on the alloying substrate, which played a critical role in preventing the formation of graphite phase and consequently enhancing diamond growth and adhesion. The mechanism of Al alloying suggests that the way used to improve hot corrosion resistance is also applicable. Then, some of the hot corrosion resistance methods, such as aluminizing, siliconizing, and so on, which have been used by some researchers examining CVD diamond films on steel substrates, are reviewed. Another way is to prepare diamond-like carbon (DLC) films on steel substrates at low temperature, and then the precipitated graphite from the internal carburization can be effectively avoided. In addition, based on some new findings, the understanding of the diamond nucleation and metastable growth is discussed.

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Section: Special Controls Of Deposition Processmentioning

confidence: 99%

Section: Special Controls Of Deposition Processmentioning

confidence: 99%

Diamond Deposition on Iron and Steel Substrates: A Review

et al. 2020

Micromachines

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“…For the peaks at 1350 cm −1 (D-band) and 1580 cm −1 (G-band) (Figure 5c), the peak shape is wide, the G-band strength and D-band strength are close (Figure 5d) and the area ratio of ID/IG is about 2.35, which is obviously higher than that of the uncoated diamond samples. The results show that the graphitization degree of diamond particles in uncoated diamond samples is higher [18] and the other bonds indicate that there are carbides or oxides at the interface [19]. In conclusion, coated diamond can effectively inhibit the graphitization structural transformation of diamond particles in the SPS process and improve the material properties.…”

Section: Interface Of Hea/diamond Compositementioning

confidence: 84%

Effect of Ti/Ni Coating of Diamond Particles on Microstructure and Properties of High-Entropy Alloy/Diamond Composites

Zhang

Peng

et al. 2019

Entropy

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In this study, an effective way of applying Ti/Ni deposited coating to the surface of diamond single crystal particles by magnetron sputtering was proposed and novel high-entropy alloy (HEA)/diamond composites were prepared by spark plasma sintering (SPS). The results show that the interfacial bonding state of the coated diamond composite is obviously better than that of the uncoated diamond composite. Corresponding mechanical properties such as hardness, density, transverse fracture strength and friction properties of the coated diamond composite were also found to be better than those of the uncoated diamond composite. The effects of interface structure and defects on the mechanical properties of HEA/diamond composites were investigated. The research directions for further improving the structure and properties of high-entropy alloy/diamond composites were proposed.

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“…As seen from Figure 8(a), the peak of diamond is at 1,332.4 cm −1 and the amorphous carbon peak is at 1,351.9 cm −1 (D-band) and 1,586.6 cm −1 (G-band), after brazing with pure Ni-Cr filler alloy (Abdu, 2021). The area ratio of I D /I G (area ratio of peak D to peak G) (Inzoli et al , 2017; Peng et al , 2021) is about 0.87. After CeO 2 addition, the peaks of diamond all appear near 1,331.6 cm −1 , the D-band near 1,351.1 cm −1 and the G-band appears near 1,587.0 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

Interfacial behavior and mechanism of brazed diamond with CeO₂-added Ni-Cr filler alloy: a combined first-principles and experimental study

Zhang

et al. 2023

SSMT

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Purpose This paper aims to investigate the effect and mechanism of O atom single doping, Ce and O atoms co-doping on the interfacial microscopic behavior of brazed Ni-Cr/diamond. Design/methodology/approach Using first-principles calculations, the embedding energy, work of separation, interfacial energy and electronic structures of Ni-Cr-O/diamond and Ni-Cr-O-Ce/diamond interface models were calculated. Then, the effect of Ce and O co-doping was experimentally verified through brazed diamond with CeO2-added Ni-Cr filler alloy. Findings The results show that O single-doping reduces the interfacial bonding strength between Ni-Cr filler alloy and diamond but enhances its interfacial stability to some extent. However, the Ce and O co-doping simultaneously enhances the interfacial bonding strength and stability between Ni-Cr filler alloy and diamond. The in-situ formed Ce-O oxide at interface impedes the direct contact between diamond and Ni-Cr filler alloy, which weakens the catalytic effect of Ni element on diamond graphitization. It is experimentally found that the fine rod-shaped Cr3C2 and Cr7C3 carbides are generated on diamond surface brazed with CeO2-added Ni-Cr filler alloy. After grinding, the brazed diamond grits, brazed with CeO2-added Ni-Cr filler alloy, present few fracture and the percentage of intact diamond reaches 67.8%. Compared to pure Ni-Cr filler alloy, the brazed diamond with CeO2-added Ni-Cr filler alloy exhibit the better wear resistance and the slighter thermal damage. Originality/value Using first-principles calculations, the effect of Ce and O atoms co-doping on the brazed diamond with Ni-Cr filler alloy is investigated, and the calculation results are verified experimentally. Through the first-principles calculations, the interface behavior and reaction mechanism between diamond and filler alloy can be well disclosed, and the composition of filler alloy can be optimized, which will be beneficial for synergistically realizing the enhanced interface bonding and reduced thermal damage of brazed diamond.

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Early stages of diamond growth on substrates with different carbon diffusivity

Cited by 5 publications

References 52 publications

Diamond Deposition on Iron and Steel Substrates: A Review

Diamond Deposition on Iron and Steel Substrates: A Review

Effect of Ti/Ni Coating of Diamond Particles on Microstructure and Properties of High-Entropy Alloy/Diamond Composites

Interfacial behavior and mechanism of brazed diamond with CeO₂-added Ni-Cr filler alloy: a combined first-principles and experimental study

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Early stages of diamond growth on substrates with different carbon diffusivity

Cited by 5 publications

References 52 publications

Diamond Deposition on Iron and Steel Substrates: A Review

Diamond Deposition on Iron and Steel Substrates: A Review

Effect of Ti/Ni Coating of Diamond Particles on Microstructure and Properties of High-Entropy Alloy/Diamond Composites

Interfacial behavior and mechanism of brazed diamond with CeO2-added Ni-Cr filler alloy: a combined first-principles and experimental study

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Interfacial behavior and mechanism of brazed diamond with CeO₂-added Ni-Cr filler alloy: a combined first-principles and experimental study