Quantitative study on graphitization and optical absorption of CVD diamond films after rapid heating treatment

Yan, Xiongbo; Wei, Junjun; An, Kang; Yun, Zhao; Liu, Jinlong; Chen, Liangxian; Hei, L.F.; Li, Chengming

doi:10.1016/j.diamond.2018.04.011

Cited by 9 publications

(6 citation statements)

References 23 publications

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“…Internal graphitization at the grain boundary degrades the optical quality of the diamond particles, resulting in a significant increase in IR absorption (10.6 μm) during CO 2 laser irradiation. [ 40 ] On the other hand, a typical HRTEM image of the LIG in Figure 3c reveals that the interlayer spacing is ≈0.35 nm which corresponds to the (002) plane of graphite. The signature of the few‐layer graphene structure and the characteristic wrinkles of the graphitized PI film caused due to compressive strain during laser irradiation are visible on the LIG surface.…”

Section: Resultsmentioning

confidence: 99%

“…[38,39] Even though diamond has a wide bandgap of ≈5.5 eV, the instantaneous high-temperature thermal shock degrades the BDNWs and strong optical absorption takes place. [40,41] This optical absorption in the IR range further increased the local film temperature of the PI sheet which facilitates the release of gaseous products resulting in the formation of a BDNW-decorated LIG surface (Figure 1b). The O 2 plasma treatment creates discrete pores with a diameter ranging from 5 to 10 µm throughout the LIG surface.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, we can conclude that despite the large bandgap of sp 3 carbon (5.5 eV), an appreciable portion of the photon energy of the CO 2 (10.6 µm) laser is absorbed by the BDNW powder due to the large number of surface defects (graphitized carbon) and the amorphous carbon shell at the grain boundary. [40,41] The surface defects of the BDNW will increase further with the laser irradiances and it can significantly raise the local film temperature of the LIG surface by the photothermal process. The compressive strain is therefore increased considerably at the LIG-diamond interface causing structural disorder (wrinkles) on the LIG surface.…”

Section: Resultsmentioning

confidence: 99%

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Tuning the Laser‐Induced Processing of 3D Porous Graphenic Nanostructures by Boron‐Doped Diamond Particles for Flexible Microsupercapacitors

Deshmukh

Jakóbczyk

Ficek

et al. 2022

Adv Funct Materials

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Carbon (sp3)‐on‐carbon (sp2) materials have the potential to revolutionize fields such as energy storage and microelectronics. However, the rational engineering and printing of carbon‐on‐carbon materials on flexible substrates remains a challenge in wearable electronics technology. This study demonstrates the scalable fabrication of flexible laser‐induced graphene (LIG)‐boron doped diamond nanowall (BDNW) hybrid nanostructures for microsupercapacitors. Direct laser writing on polyimide film is tuned by the presence of BDNW powder where an appreciable absorbance of the BDNWs at the CO2 laser wavelength enhances the local film temperature. The thermal shock due to laser irradiation produces graphitized and amorphous carbon at the diamond grain boundaries which increases the thermal and charge transfer capacity between the LIG–diamond interfaces. The samples are further treated with O2 plasma to tune the wettability or to improve the microsupercapacitor device performance. The outstanding electrical characteristics of graphene, exceptional electrochemical stability of diamond, and essential contributions of oxygen‐containing groups result in a remarkable charge storage capacity (18 mF cm−2 @ 10 mV s−1) and cyclic stability (98% retention after 10 000 cycles) outperforming most state‐of‐the‐art LIG‐based supercapacitors. Furthermore, despite extreme mechanical stress, these microsupercapacitors maintain their outstanding electrochemical properties, thus holding promise for high‐power, flexible/wearable electronics.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Tuning the Laser‐Induced Processing of 3D Porous Graphenic Nanostructures by Boron‐Doped Diamond Particles for Flexible Microsupercapacitors

Deshmukh

Jakóbczyk

Ficek

et al. 2022

Adv Funct Materials

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“…There are reports demonstrating that the diamond exposed to heating for a long time may undergo graphitization in the temperature range of 650–750 °C [ 41 ]. Yan, with co-authors, investigated diamond behavior under instantaneous thermal shock, and they found that even at temperatures between 1500 °C and 1800 °C, the graphitization process took place mainly along the grain boundaries [ 42 ]. Thus, based on the available data, it is reasonable to assume that it was the sintering conditions with high heating rates that prevented the diamond grits from graphitization.…”

Section: Resultsmentioning

confidence: 99%

Enhancement of the Refractory Matrix Diamond-Reinforced Cutting Tool Composite with Zirconia Nano-Additive

Ratov,

Mechnik,

Rucki

et al. 2024

Materials

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This paper presents the results of the experimental research on diamond-reinforced composites with WC–Co matrices enhanced with a ZrO2 additive. The samples were prepared using a modified spark plasma sintering method with a directly applied alternating current. The structure and performance of the basic composite 94 wt.%WC–6 wt.%Co was compared with the ones with ZrO2 added in proportions up to 10 wt.%. It was demonstrated that an increase in zirconia content contributed to the intense refinement of the phase components. The composite 25 wt.%Cdiamond–70.5 wt.%WC–4.5 wt.%Co consisted of a hexagonal WC phase with lattice parameters a = 0.2906 nm and c = 0.2837 nm, a cubic phase (a = 1.1112 nm), hexagonal graphite phase (a = 0.2464 nm, c = 0.6711 nm), as well as diamond grits. After the addition of zirconia nanopowder, the sintered composite contained structural WC and Co3W3C phases, amorphous carbon, tetragonal phase t-ZrO2 (a = 0.36019 nm, c = 0.5174 nm), and diamond grits—these structural changes, after an addition of 6 wt.% ZrO2 contributed to an increase in the fracture toughness by more than 20%, up to KIc = 16.9 ± 0.76 MPa·m0.5, with a negligible decrease in the hardness. Moreover, the composite exhibited an alteration of the destruction mechanism after the addition of zirconia, as well as enhanced forces holding the diamond grits in the matrix.

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“…In the Raman spectra for graphitization of diamond, an increase in the peak around 1470 cm –1 with increasing annealing temperature is reported, − which has assumed the assignment of finite-size crystals of graphite, − highly disordered graphite, , amorphous carbon, , or v 3 mode for trans -polyacetylene. − …”

Section: Resultsmentioning

confidence: 99%

Superlubricity with Graphitization in Ti-Doped DLC/Steel Tribopair: Response on Humidity and Temperature

Kim

Lee

Tokoroyama

et al. 2023

ACS Appl. Mater. Interfaces

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The anti-friction of diamond-like carbon (DLC) is achieved by a well-developed carbonaceous transfer layer, and Ti-doped DLC is developed into a robustly built-up carbonaceous transfer layer. The friction performance of DLC depends on the operating environment, e.g., ambient gas, humidity, temperature, lubricants, and mating material. In this study, we aimed to reveal the environmental sensitivities of Ti-DLC on friction characteristics. To this end, a Ti-DLC was rubbed against a steel ball, and friction behaviors were evaluated with different gas compositions, humidity, and temperature. Finally, we identified that fractional coverage of water on surfaces affected the anti-graphitization on Ti-DLC, leading to avoiding friction reduction.

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Quantitative study on graphitization and optical absorption of CVD diamond films after rapid heating treatment

Cited by 9 publications

References 23 publications

Tuning the Laser‐Induced Processing of 3D Porous Graphenic Nanostructures by Boron‐Doped Diamond Particles for Flexible Microsupercapacitors

Tuning the Laser‐Induced Processing of 3D Porous Graphenic Nanostructures by Boron‐Doped Diamond Particles for Flexible Microsupercapacitors

Enhancement of the Refractory Matrix Diamond-Reinforced Cutting Tool Composite with Zirconia Nano-Additive

Superlubricity with Graphitization in Ti-Doped DLC/Steel Tribopair: Response on Humidity and Temperature

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