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Journal articles on the topic 'Diamond surface'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Valerii, Lavrinenko, Solod Volodymyr, Ilnytska Halina, Smokvyna Volodymyr, and Kashynskiy Ivan. "RESEARCH OF THERMAL INFLUENCE ON THE CHANGE OF THE SURFACE LAYER OF DIAMONDS AND ASSOCIATED TOOL MATERIALS (REVIEW)." Collection of scholarly papers of Dniprovsk State Technical University (Technical Sciences) 2, no. 43 (2023): 39–55. http://dx.doi.org/10.31319/2519-2884.43.2023.4.

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Attention is drawn to the fact that the issues of effective processing of such fragile, difficult-to-process materials as mono- and polycrystalline diamonds are currently being discussed in the literature, including CVD diamond films, sapphire, etc. For the most part, such processing is faced with the issues of thermal impact on the surface of the tool material, taking into account the defects of the diamonds that undergo processing, directed impact on the surface of such diamonds, heat and modification of the surface of diamonds and accompanying tool materials. In this review, attention

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2

Lin, Guan Fu, Ming Yi Tsai, and Chiu Yuan Chen. "Development of a Combined Diamond Impregnated Lapping Plate." Key Engineering Materials 739 (June 2017): 157–63. http://dx.doi.org/10.4028/www.scientific.net/kem.739.157.

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This paper presents a combined diamond-impregnated lapping plate for single crystal silicon carbide (SiC) to improve the material removal rate due to SiC having very low material removal rate. Three different dimaond shapes were prepared: (1) "sharp," a sharp-edged diamod; (2) "blocky," a high quality crystalline diamond; (3) "oxidized diamond". The diamonds were manufactured by using high temperature heating method in a furnace to induce diamond oxidation resulting in improvement of Ra and sharpness of the diamonds. Three combined diamond-impregnated lapping plates were fabricated using the a

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3

Yuan, Zewei, Zhihui Cheng, and Yusen Feng. "A Systematic Study of the Factors Affecting the Surface Quality of Chemically Vapor-Deposited Diamond during Chemical and Mechanical Polishing." Micromachines 15, no. 4 (2024): 459. http://dx.doi.org/10.3390/mi15040459.

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Diamond surfaces must be of high quality for potential use in semiconductors, optical windows, and heat conductivity applications. However, due to the material’s exceptional hardness and chemical stability, it can be difficult to obtain a smooth surface on diamond. This study examines the parameters that can potentially influence the surface quality of chemically vapor-deposited (CVD) diamonds during the chemical and mechanical polishing (CMP) process. Analysis and experimental findings show that the surface quality of polished CVD diamonds is significantly influenced by the crystal structure

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4

Segl, Jakob, and Christian Edtmaier. "Influence of the Diamond Surface Termination on the Thermal Conductivity of Al/Diamond- and Ag/Diamond MMCs." Materials Science Forum 825-826 (July 2015): 142–49. http://dx.doi.org/10.4028/www.scientific.net/msf.825-826.142.

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MMCs consisting of diamonds and highly conductive metal matrices have been produced via gas pressure assisted liquid metal infiltration and their thermal properties have been investigated. Special attention was paid towards the diamond surface termination and its influence on the diamond-metal-interface and the resulting heat transport across this interface. Altering the diamond terminating surface layer can lead to a rather drastic increase in the thermal conductivity, rendering MMCs with pretreated diamonds double the thermal conductivity of the ones with as-received diamonds. The evolution

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5

Ilnytska, H. D., O. B. Loginova, V. V. Smokvyna, I. M. Zaitseva, and О. V. Dovha. "Features of the physicochemical properties of narrow fractions of aggregates of diamond nanopowders modified with iron ions." Surface 12(27) (December 30, 2020): 161–68. http://dx.doi.org/10.15407/surface.2020.12.161.

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The paper presents the results of a study of the physical and chemical properties of narrow fractions of diamond nanopowders with a low content of non-diamond carbon grade ASUD-99. Six fractions with different average diameters of diamond particle aggregates from 28.785 to 3.891 μm were obtained by separating a 0.2 % aqueous suspension of the initial powders by the sedimentation method. It has been found that the smallest aggregates consist of larger particles with a smaller specific surface area and a lower interaction energy between them. This conclusion is confirmed by a decrease in the por

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6

Miwa, Hirotaka, Takayoshi Katagi, Minoru Ota, Keishi Yamaguchi, Kai Egashira, and Toshikazu Nanbu. "Surface Finishing on Arc-Shaped Inner Surface by Ultraviolet Assisted Polishing." Materials Science Forum 874 (October 2016): 133–38. http://dx.doi.org/10.4028/www.scientific.net/msf.874.133.

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Recently, diamonds have been utilized gradually for sliding parts and wear-resistant parts because of their excellent properties. The shape of diamond applied to these parts is not only plane but also arc-shaped inner surface. Therefore, development of diamond polishing technology is required. In this study, ultraviolet assisted polishing was thought to develop to polish polycrystalline diamond (PCD) on arc-shaped inner surface. The authors investigated effect of ultraviolet radiation on polishing efficiency and surface roughness. As a result, the surface roughness Ra of PCD showed less than 1

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7

Xiang, Dong, Li Qun Jia, and Ke Gao Liu. "Structure and Performance of Chemical Duplex Plating Ti Metal Layer on Diamond Surface by Hydrothermal Method." Advanced Materials Research 936 (June 2014): 1676–80. http://dx.doi.org/10.4028/www.scientific.net/amr.936.1676.

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As a surface of diamond has a higher interfacial energy and worse binding force, the diamond shed from matrix easily. For solving this, the microstructures and properties of the metallic coating on diamond surface were studied. The different temperatures, such as 110, 120, and 130 °C for 6 h, were used for coating diamond in the high-pressure reactor respectively. The structure and performance of the metallic coating on diamond surface were tested by Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) and diamond compressive strength instrument. The results showed that a continuous and

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8

Liao, Yunn Shiuan, and C. T. Yang. "Investigation of the Wear of the Pad Conditioner in Chemical Mechanical Polishing Process." Advanced Materials Research 76-78 (June 2009): 195–200. http://dx.doi.org/10.4028/www.scientific.net/amr.76-78.195.

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The pad surface will become grazed because of the accumulated debris in the chemical mechanical polishing (CMP) process. It results in the reduction of the wafer removal rate, and a pad conditioner or diamond disk must be frequently employed to refresh the pad surface. The wear behavior of a diamond with respect to its location, original relative protruded height and protruded shape on a diamond disk was investigated in this thesis. It was found from experimental data that the diamonds which were located outside, originally protruded more highly and with crest lines oriented upward wore faster

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9

Naruse, Yuto, Jae-Hyeok Park, Tkeshi Hagio, Yuki Kamimoto, Ryoichi Ichino, and Takeshi Bessho. "Electroplating of copper/microdiamond composites and the effect of diamond surface functionalization." Functional Materials Letters 14, no. 05 (2021): 2151023. http://dx.doi.org/10.1142/s1793604721510231.

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Compositing diamonds with high thermally conductive metals, such as copper, have attracted much attention in recent years. In this study, we prepared copper/diamond composites by electroplating and investigated the effect of the surface functionalization of diamond on the interfacial adhesion of copper and diamond in the composite. Oxygen-containing groups were introduced on the diamond surface by a hydrothermal treatment and amino groups were further introduced using a silane coupling agent. Surface functionalization of diamond with both these groups led to drastically increased wettability a

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10

Takahashi, Mamoru, and Osamu Kamiya. "Influence of Diamond Seed Attachment Processing on Diamond Films Synthesized on Tungsten Carbide Substrate by Flame Combustion." Journal of Materials and Applications 12, no. 1 (2023): 11–20. http://dx.doi.org/10.32732/jma.2023.12.1.11.

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The flame combustion method enables the synthesis of diamonds via acetylene-oxygen gas flame combustion in ambient air. Tungsten carbide (WC) has recently been utilized as a cutting tool in the machining industry and in dental machining applications. To obtain high-quality diamond films and achieve good adhesion on a WC substrate, diamond films are synthesized on a WC substrate by the flame combustion method. However, the surface roughness of most of the diamond films synthesized by this method increased, and it was necessary to reduce this roughness. Considering the roughness accuracy of the

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11

Lavrinenko, Valerii, Vladimir Fedorovich, Yevgeniy Ostroverkh, and Volodymyr Solod. "MODERN DEVELOPMENTS RELATED TO THE DIRECTED IMPACT ON THE CUTTING SURFACE OF A DIAMOND ABRASIVE TOOL AND ITS CONTACT ZONE IN THE PROCESSES OF MACHINING (REVIEW)." Cutting & Tools in Technological System, no. 98 (May 25, 2023): 13–29. http://dx.doi.org/10.20998/2078-7405.2023.98.02.

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This article provides information on modern developments in the direction of directed impact on the cutting surface of a diamond-abrasive tool and its contact zone in machining processes. For the most part, such processing is faced with issues of influence on the cutting surface of diamond tools, including ruling mechanical and electrophysical, taking into account the defectiveness of the diamonds that undergo processing, the directed influence on the surface of such diamonds, thermal and modification of the surface of diamonds. Such developments make it possible to significantly intensify pro

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12

Zhang, T., Fang Hong Sun, Bin Shen, and Z. M. Zhang. "Fabrication and Characterization of High Quality Micro Diamonds by Hot Filament CVD." Advanced Materials Research 325 (August 2011): 582–87. http://dx.doi.org/10.4028/www.scientific.net/amr.325.582.

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The high quality micro diamonds with the euhedral diamond faces are fabricated by hot filament chemical vapor deposition technique (HFCVD). The high pressure and high temperature (HPHT) single crystal diamonds in size of 1 μm are used as seeds. In order to disperse the diamond seeds uniformly on a silicon wafer, the photoresist solution with diamond seeds are performed on the silicon wafer by a spin coater machine. The high substrate temperature and low acetone concentration are employed for decreasing the nucleation rate and accelerating the growth rate. The morphology and quality of the micr

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13

Takahashi, Mamoru, Riki Suzuki, Yoshiya Kurihara, Reina Nagasawa, and Osamu Kamiya. "Effect of Distance of the Flame’s Inner Cone from Substrate Surface on Diamond Films Synthesized on Ti Substrate for Dental Implants by Flame Combustion." Journal of Materials and Applications 13, no. 2 (2024): 30–43. http://dx.doi.org/10.32732/jma.2024.13.2.30.

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Flame combustion enables the synthesis of diamonds via acetylene-oxygen gas flame combustion in ambient air. Recently, titanium has been used for dental implants in the dental industry. In this study, diamond films were synthesized on a Ti substrate using the flame combustion method to improve the strength, wear resistance, and biocompatibility of dental implant surfaces. Moreover, to obtain high-quality diamond films and various synthesized diamond crystallites sizes and to achieve good adhesion on the Ti substrate, as a condition of the synthesis to prevent delamination, the distance of the

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14

Yang, Guoyong, Yunxiang Lu, Bo Wang, et al. "Chemical Vapor Deposition of <110> Textured Diamond Film through Pre-Seeding by Diamond Nano-Sheets." Materials 15, no. 21 (2022): 7776. http://dx.doi.org/10.3390/ma15217776.

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Diamond films prepared by chemical vapor deposition will exhibit different surface morphologies, which are determined by the texture and the structural perfection of the deposited diamond. In general, its surface morphology can be controlled by adjusting the deposition conditions. In the present work, <110> textured diamond film was deposited on single crystalline silicon through pre-seeding by diamond nanosheets, rather than controlling the deposition conditions. The employed diamond nano-sheets were prepared by cleavage along a plane, exhibiting good crystallinity. Before chemical vapo

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15

Bazaliy, G., N. Oliinyk, and G. Ilnytska. "The effect of modification diamond nanopowders detonation synthesis to change their electrokinetic and electrophysical characteristics." Surface 12(27) (December 30, 2020): 169–78. http://dx.doi.org/10.15407/surface.2020.12.169.

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Development of methods for controlling the change in the functional cover and the energy composition of the surface of detonation synthesis diamond nanopowders is necessary to create stable suspensions and materials from them. The aim of this work is to study changes in the electrokinetic and electrophysical characteristics of the powder as a result of the modification of detonation synthesis diamond nanopowders using a liquid-phase thermochemical treatment. Diamond nanopowders of grades ASUD-75 - ASUD-99 with different sp2-hybridization carbon content, manufactured at the V.I. Bakul National

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16

Kaminsky, F. V., and S. A. Voropaev. "Modern Concepts on Diamond Genesis." Geochemistry International 59, no. 11 (2021): 1038–51. http://dx.doi.org/10.1134/s0016702921110033.

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AbstractThe best-known, most well-studied diamondiferous rocks are kimberlites and lamproites. Diamonds are also found in impactites, metamorphic rocks, ophiolites, and modern volcanic rocks. Diamonds from these rocks differ from kimberlitic diamonds in size, morphology, trace-element and isotope composition, and physical properties. Differences in these characteristics are related to their different mechanisms of origin. In some cases, diamonds can be formed in “metastable” conditions under disequilibrium thermodynamic parameters, supporting the conclusion that diamond is a polygenetic minera

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17

Ma, Bo Jiang, Yu Can Fu, Wen Feng Ding, Wei Gao, and Hong Jun Xu. "Research on Interfacial Microstructure of Ti-Coated Diamond Brazed and Uncoated Diamond Brazed by High-Frequency Induction." Key Engineering Materials 359-360 (November 2007): 53–57. http://dx.doi.org/10.4028/www.scientific.net/kem.359-360.53.

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The Ti-coated diamond and the uncoated diamond were brazed with Ni-based filler alloy by high-frequency induction under argon atmosphere at 1050°C within 15 seconds. The interfacial microstructures between brazed diamond and the filler alloy were analyzed by scanning electron microscopy (SEM), energy dispersion spectrometer (EDS) and X-ray diffraction (XRD). It is surprisedly found that Cr-carbides forms normally and compactly on the surface of Ti-coated diamond brazed, whereas Cr-carbide forms tangentially and loosely on the surface of uncoated diamond brazed. The abrade experiment results fo

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18

Ma, Bo Jiang, and Zhu Ang Xu. "Research on High-Powered Brazing Diamond Saw for Cutting Vehicle Tyre." Advanced Materials Research 87-88 (December 2009): 52–57. http://dx.doi.org/10.4028/www.scientific.net/amr.87-88.52.

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The high-powered brazing diamond saw was developed to cut vehicle tyre efficiently. The Ti-coated diamond and the uncoated diamond were brazed with NiCr alloy by high-frequency induction under argon atmosphere at 1020°C within 10 seconds. The interfacial microstructures between brazed diamond and the filler alloy were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersion spectrometer (EDS). It is surprisedly found that Cr-carbides forms compactly and normally on the surface of Ti-coated diamond brazed, whereas Cr-carbide forms loosely and tangentially on

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19

Yuan, Huixin, Chengwei Song, Chunyu Zhang, et al. "Simulation study on the effect of different wavelengths of laser on graphitization of diamond surface." Journal of Physics: Conference Series 2566, no. 1 (2023): 012079. http://dx.doi.org/10.1088/1742-6596/2566/1/012079.

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Abstract A temperature field simulation study of CVD diamonds under nanosecond laser processing was carried out to investigate the characteristics of diamond graphitization and material removal mechanisms during nanosecond laser processing. Experimental results show that diamond undergoes significant burn and graphitization during laser processing. The graphite layer thickness and width of the diamond surface were measured to determine the regularity of nanosecond laser-induced diamond graphitization. Analysis of the simulation results for the diamond temperature profile shows that the nanosec

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20

Xu, Xi Peng, Y. B. Hong, and S. Chen. "Performance of Diamond Segments in Different Machining Processes." Materials Science Forum 471-472 (December 2004): 77–81. http://dx.doi.org/10.4028/www.scientific.net/msf.471-472.77.

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An investigation is reported of the performance of diamond impregnated segments in three machining processes - circular sawing of granite with diamond segments, dressing of diamond segments with refractory bricks and surface grinding of diamond segments with an alumina wheel. Two kinds of segments were fabricated by incorporating diamonds (either coated or uncoated) into an iron-based bond matrix. Measurements were made of the horizontal and vertical force components in the machining processes. SEM was used to examine the diamond-matrix bonding states and the ground surfaces of the segments. T

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21

Chepurov, Aleksei, Valeri Sonin, Dmitry Shcheglov, et al. "Surface Porosity of Natural Diamond Crystals after the Catalytic Hydrogenation." Crystals 11, no. 11 (2021): 1341. http://dx.doi.org/10.3390/cryst11111341.

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The study of diamond surfaces is traditionally undertaken in geology and materials science. As a sample material, two natural diamond crystals of type Ia were selected, and their luminescence and nitrogen state was characterized. In order to etch the surface catalytic hydrogenation was performed using Fe particles as an etchant. Micromorphology of the surface was investigated by scanning electron and laser confocal microscopy. It was demonstrated that etching occurred perpendicular to the crystal surface, with no signs of tangential etching. The average depth of caverns did not exceed 20–25 μm

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Li, Xingyu, Guanjie Ma, Yuhao Long, et al. "Controllable preparation of surface nanostructures on boron doped diamond by plasma etching." Journal of Physics: Conference Series 2825, no. 1 (2024): 012038. http://dx.doi.org/10.1088/1742-6596/2825/1/012038.

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Abstract Due to the high hardness and chemical inertness of diamond, it is difficult to fabricate diamond nanostructures, especially with a high aspect ratio. Plasma etching is an attractive technology for processing diamonds due to its high anisotropic nature and fine controllability, which is of great significance to diamond machining and diamond device fabrication. In this paper, we fabricated large area and high aspect ratio diamond nanoneedle arrays on boron-doped diamond (BDD) by using a maskless inductively coupled plasma (ICP) etching process. The ICP etching was performed in hydrogen

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Afanasiev, Valentin, Sargylana Ugapeva, and Alla Logvinova. "Shape Change of Mineral Inclusions in Diamond—The Result of Diffusion Processes." Minerals 14, no. 6 (2024): 594. http://dx.doi.org/10.3390/min14060594.

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The paper considers the possibility of changing the morphology of inclusions in diamonds based on the study of these inclusions and the inclusion–diamond boundary. Raman spectroscopy and transmission electron microscopy methods were used. According to the literature data, it is known that the octahedral form of mineral inclusions in diamond is induced, and does not correspond to the initial conditions of joint growth of diamond and inclusion, but the mechanism of this process is not considered. Solids differ in the value of surface Gibbs energy; the harder the material, the higher its melting

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24

Xiang, Dong, Long Wei Yin, Ke Gao Liu, and Li Qun Jia. "Study of W Metallic Coating Layer on Diamond Surface by Hydrothermal Method." Advanced Materials Research 79-82 (August 2009): 699–702. http://dx.doi.org/10.4028/www.scientific.net/amr.79-82.699.

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As the diamond surface has higher interface energy, the adhesion of surface and matrix is bad, and it makes the diamond shatter easily. For solving this, the microstructures and properties of the metallic coating on the diamond surface which contains W (tungsten) by hydrothermal method are studied. The different temperatures such as 110 ~140°C and 5h insulating were adopted to be coated in high pressure reactor respectively. The metallic coating on the diamond surface was studied by SEM，XRD and so on. The results show that the continuous and compact coating of Ni and W on the diamond surface i

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Wan, Linfeng, Caoyuan Mu, Yaofeng Liu, et al. "Structure and Wettability Engineering of Polycrystalline Diamond Films Treated by Thermally Oxidation, Second Growth and Surface Termination." Chinese Physics Letters 39, no. 3 (2022): 036801. http://dx.doi.org/10.1088/0256-307x/39/3/036801.

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High-quality polycrystalline diamond films with dominated (100)-oriented grains are realized by combining the thermally oxidation and the homogeneous second growth processes. Moreover, we investigate the wettability property of the polycrystalline diamonds in various stages. Different surface structures (with various grain sizes, voids, and orientations, etc.) and terminations (hydrogen or oxygen) have significant effects on the wettability of polycrystalline diamond films. The wettability is further closely related to the polarity of solutions. By measuring the contact angle and calculating t

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PENG, J. L., SHAUN BULCOCK, PETER I. BELOBROV, and L. A. BURSILL. "SURFACE BONDING STATES OF NANO-CRYSTALLINE DIAMOND BALLS." International Journal of Modern Physics B 15, no. 31 (2001): 4071–85. http://dx.doi.org/10.1142/s0217979201007865.

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The rough surface of nano-crystalline diamond spheres induces surface electronic states which appear as a broadened pre-peak over approx. 15 eV at the C K-edge energy threshold for carbon in the parallel electron energy loss spectrum (PEELS). This appears to be at least partially due to 1s-π* transitions, although typically the latter occupy a range of only 4 eV for the sp2 edge of highly-oriented pyrollytic graphite (HOPG). No π* electrons appear in the conduction band inside the diamond particles, where all electrons are sp3 hybridized. PEELS data were also obtained from a chemical vapour de

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Mao, Rongqi, Xiwei Cui, Jinglin Hao, et al. "Densification and Surface Carbon Transformation of Diamond Powders under High Pressure and High Temperature." Materials 17, no. 3 (2024): 603. http://dx.doi.org/10.3390/ma17030603.

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A new type of poly-diamond plate without a catalyst was produced via the high-pressure high-temperature (HPHT) compression of diamond powders. The densification of diamond powders and sp3 to sp2 carbon on the surface under HPHT compression was investigated through the characterization of the microstructure, Raman spectroscopy analysis and electrical resistance measurement. The densification and sp3-sp2 transformation on the surface are mainly affected by the pressure, temperature and particle size. The quantitative analysis of the diamond sp3 and sp2 carbon amount was performed through the pea

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Lavrinenko, V., V. Poltoratskyi, О. Pasichnyi, V. Solod, and D. Muzichka. "MODIFICATION OF HEAT-RESISTANT OXIDES AND CHLORIDES OF GRAIN SURFACES OF SYNTHETIC DIAMOND GRINDING POWDERS FOR APPLICATION IN GRINDING TOOLS." Collection of scholarly papers of Dniprovsk State Technical University (Technical Sciences) 2, no. 39 (2021): 51–58. http://dx.doi.org/10.31319/2519-2884.39.2021.6.

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Further development of modern technologies of diamond processing is connected with application in the diamond tool of powders with new unique properties, special morphology of grains, with the increased chemical and thermal stability. To increase the heat resistance of diamonds, they are covered with a metal (metallization) or glass-ceramic layer, or introduced into the reaction mixture used in the synthesis of diamonds, alloying additives of certain elements. Recently, other methods of coating to increase the heat resistance of diamonds have been developed, such as: vacuum ion-plasma sputteri

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Khokhryakov, Alexander F., Denis V. Nechaev, and Alexander G. Sokol. "Microrelief of Rounded Diamond Crystals as an Indicator of the Redox Conditions of Their Resorption in a Kimberlite Melt." Crystals 10, no. 3 (2020): 233. http://dx.doi.org/10.3390/cryst10030233.

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We conducted a detailed study of the morphology of diamond crystals partially dissolved in a water-bearing kimberlite melt at pressure of 6.3 GPa, temperature of 1400 °C, and two oxygen fugacities (fO2) corresponding to the Re-ReO2 buffer and near the magnetite–hematite (MH) buffer. The triangular etch pits on the {111} faces, which formed during experimental diamond dissolution, were found to completely correspond to negative trigons on natural diamond crystals in the shape and sidewalls inclination angle. Furthermore, two experimental fO2 values were associated with two relief types of the r

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Chen, Yongqian, Shanghua Zhang, Jialin Liu, et al. "Numerical Simulation of Temperature Characteristics and Graphitization Mechanism of Diamond in Laser Powder Bed Fusion." Materials 16, no. 18 (2023): 6338. http://dx.doi.org/10.3390/ma16186338.

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Thermal damage to diamonds is a major limitation in laser powder bed fusion (LPBF) processing of metal matrix diamond composites. In this paper, a numerical simulation model was established to describe the thermal effect of the Diamond-CuSn10 composite on the LPBF process. The simulation results show that the temperature of the diamond presents a double-peak structure, and the double-peak temperature curve shape can be modulated by modifying the laser scanning offset and the size of the diamond powder. And it suggests that the heat of the diamond mainly comes from the transfer of the molten po

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Alba, Gonzalo, M. Pilar Villar, Rodrigo Alcántara, Javier Navas, and Daniel Araujo. "Surface States of (100) O-Terminated Diamond: Towards Other 1 × 1:O Reconstruction Models." Nanomaterials 10, no. 6 (2020): 1193. http://dx.doi.org/10.3390/nano10061193.

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Diamond surface properties show a strong dependence on its chemical termination. Hydrogen-terminated and oxygen-terminated diamonds are the most studied terminations with many applications in the electronic and bioelectronic device field. One of the main techniques for the characterization of diamond surface terminations is X-ray photoelectron spectroscopy (XPS). In this sense, the use of angle-resolved XPS (ARXPS) experiments allows obtaining depth-dependent information used here to evidence (100)-O-terminated diamond surface atomic configuration when fabricated by acid treatment. The results

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Sonin, V. M., E. I. Zhimulev, A. A. Chepurov, B. S. Pomazanskiy, V. P. Afanasiev, and A. I. Chepurov. "Incipient stages of transformation of round natural diamonds under dissolution in Fe-S melt at high pressure." LITHOSPHERE (Russia) 19, no. 6 (2020): 945–52. http://dx.doi.org/10.24930/1681-9004-2019-19-6-945-952.

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Research subject. The article presents the results of a microscopic and photogoniometric study of natural rounded diamonds of tetraghexahedral habit from the kimberlite pipe “Internationalnaya” (Yakutia). The diamonds was partially dissolved in a sulphur-containing iron melt (sulphur content of 15–30 wt %) at 4.5 GPa and 1450ºС.Methods. The experiments were carried out on a multi-puncheon apparatus of a “split-sphere” type in high-pressure solid-phase cells made of refractory oxides ZrO2, CaO, MgO using a cylindrical shape graphite heater. The crystals were studied using an MBS-10 optical micr

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Li, Hongdong, Shaoheng Cheng, Jia Li, and Jie Song. "A Review on the Low-Dimensional and Hybridized Nanostructured Diamond Films." Journal of Nanomaterials 2015 (2015): 1–15. http://dx.doi.org/10.1155/2015/692562.

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In the last decade, besides the breakthrough of high-rate growth of chemical vapor deposited single-crystal diamonds, numerous nanostructured diamond films have been rapidly developed in the research fields of the diamond-based sciences and industrial applications. The low-dimensional diamonds of two-dimensional atomic-thick nanofilms and nanostructural diamond on the surface of bulk diamond films have been theoretically and experimentally investigated. In addition, the diamond-related hybrid nanostructures of n-type oxide/p-type diamond and n-type nitride/p-type diamond, having high performan

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KOVALENKO, Evgeny G., Galina P. DVOICHENKOVA, Valery V. MOROZOV, Irina V. PESTRYAK, and Valentina A. CHUT-DY. "THE CHOICE OF TECHNOLOGY TO INCREASE THE HYDROPHOBICITY AND RECOVERABILITY OF DIAMONDS OF THE BOTUOBINSKAYA TUBE." Mine Surveying and Subsurface Use, no. 3 (2024): 112–21. http://dx.doi.org/10.56195/20793332_2024_3_112_121.

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A promising direction for solving the problem of producing small diamonds is to expand the range of enriched classes and reduce diamond losses through the use of modern technologies. The article presents the results of research on the causes of reduced hydrophobicity of Botuobinskaya tube diamonds and the choice of parameters for preparing the feedstock for the processes of sticky and foam separation, ensuring the restoration of surface properties and extraction of hydrophilized diamonds into concentrate. Studies have shown that the mineral coatings on the surface of diamonds are fragments of

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Tung, Jen-Chuan, Tsung-Che Li, Yen-Jui Teseng, and Po-Liang Liu. "Effect of Nitrogen on the Growth of (100)-, (110)-, and (111)-Oriented Diamond Films." Applied Sciences 11, no. 1 (2020): 126. http://dx.doi.org/10.3390/app11010126.

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The aim of this research is the study of hydrogen abstraction reactions and methyl adsorption reactions on the surfaces of (100), (110), and (111) oriented nitrogen-doped diamond through first-principles density-functional calculations. The three steps of the growth mechanism for diamond thin films are hydrogen abstraction from the diamond surface, methyl adsorption on the diamond surface, and hydrogen abstraction from the methylated diamond surface. The activation energies for hydrogen abstraction from the surface of nitrogen-undoped and nitrogen-doped diamond (111) films were −0.64 and −2.95

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Dvoichenkova, G. P., V. V. Morozov, E. L. Chanturia, and E. G. Kovalenko. "Selection of recycled water electrochemical conditioning parameters for preparation of diamond-bearing kimberlite for froth separation." Gornye nauki i tekhnologii = Mining Science and Technology (Russia) 6, no. 3 (2021): 170–80. http://dx.doi.org/10.17073/2500-0632-2021-3-170-180.

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The main reason of decreasing diamond recovery through froth separation is their surface hydrophilization by hypergene minerals and technogenic films, crystallized from the supersaturated aqueous phase, fixed on the surface structurally or by adhesion. Various types of physical actions, including thermal and ultrasonic treatment of the initial feed of froth separation, are recommended to increase the diamond-bearing kimberlite beneficiation process performance, providing cleaning of the surface of diamonds due to destruction of their accretions with rock minerals and removal of film hydrophili

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Sun, Kaiyue, Taijin Lu, Mingyue He, Zhonghua Song, Jian Zhang, and Jie Ke. "Morphological and Surface Microtopographic Features of HPHT-Grown Diamond Crystals with Contact Twinning." Crystals 12, no. 9 (2022): 1264. http://dx.doi.org/10.3390/cryst12091264.

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Gem-grade twinned high-pressure high-temperature (HPHT) synthetic diamond crystals are rare. Hence, few investigations on their morphological features and formation have been reported. In this article, the morphological and surface microtopographic features of HPHT synthetic-diamond crystals contact twinning is detailed and investigated. It indicates that twins of diamond forming and nucleating during the early stages of the growth and the development of {100} and {111} growth sectors on either side of such boundaries proceeds independently, which affects the final morphology of the diamond cr

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Edtmaier, C., Ludger Weber, and Reza Tavangar. "Surface Modification of Diamonds in Diamond/Al-Matrix Composite." Advanced Materials Research 59 (December 2008): 125–30. http://dx.doi.org/10.4028/www.scientific.net/amr.59.125.

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Fe- or Mn-powders were mixed with the diamonds and the mixtures were heat treated under different gas atmospheres like hydrogen or argon gas and at varying temperatures in order to roughen the surface of the diamond particles. Subsequently the reaction layers are removed by the addition of aqueous solutions of HCl. The modified surface structure after the etching process is investigated by electron microscopy showing increased roughening of the formerly flat faces of the diamond particles with increasing heat treatment temperature. After drying the diamonds, composites were prepared by gas pre

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Zhang, Qunli, Yiyun Chen, Bo Li, Changyi Wang, Lijuan Wu, and Jianhua Yao. "Tribological Behavior of Ti-Coated Diamond/Copper Composite Coating Fabricated via Supersonic Laser Deposition." Lubricants 11, no. 5 (2023): 216. http://dx.doi.org/10.3390/lubricants11050216.

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Diamond/copper composite coating is promising for wear-resistant applications, owing to the extreme hardness of the diamond reinforcement. Ti-coated diamond/copper composite coatings with various laser powers were successfully fabricated employing the novel manufacturing technology of supersonic laser deposition (SLD). Ti-coated diamond, which was able to enhance the wettability between diamond and copper, was prepared at the optimal parameters via salt bath. Nano-spherical titanium carbides were uniformly distributed on the diamond’s surface to generate a favorable interface bonding with a co

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40

Hamzah, Esah, Tze Mi Yong, and Kevin Chee Mun Fai. "XRD Studies on Residual Stress of the Diamond Films Grown Using Hot Filament Chemical Vapour Deposition Technique on Silicon Nitride and Tungsten Carbide Substrates." Advanced Materials Research 686 (April 2013): 325–30. http://dx.doi.org/10.4028/www.scientific.net/amr.686.325.

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This study analyses residual stress measurement using X-Ray diffraction method on ultrafine-polycrystalline diamonds and polycrystalline diamonds films grown using Hot Filament Chemical Vapour Deposition technique (HFCVD) on silicon nitride(Si3N4) and tungsten carbide (WC) substrates in the same chamber at the same time with varied pretreatments prior to HFCVD diamond deposition. Measurements were taken perpendicular to the surface and the measured residual stress states of the diamond films are in compression. Thus, assuming isotropic properties of the film, the diamond films grown have tensi

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Zhang, Xuliang, Youhong Sun, Qingnan Meng, Jinhao Wu, and Linkai He. "Enhancement of Oxidation Resistance via Chromium Boron Carbide on Diamond Particles." Coatings 11, no. 2 (2021): 162. http://dx.doi.org/10.3390/coatings11020162.

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To improve the oxidation resistance of diamond, chromium boron carbide (Cr–B–C) coatings were synthesized through high temperature solid state synthesis and molten salt method on diamond particles in this paper. After holding the raw material at 900 °C for 2 h, the diamond surface was completely and uniformly covered by Cr–B–C coatings. Oxidation resistance of the diamond coated Cr–B–C was determined by the thermogravimetric analysis (TGA). The results revealed that the Cr–B–C coatings held the diamonds for 100%-mass in air atmosphere until 1151 °C, which was much better than the uncoated diam

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Sonin, Valeri, Egor Zhimulev, Aleksei Chepurov, et al. "Experimental Etching of Diamonds: Extrapolation to Impact Diamonds from the Popigai Crater (Russia)." Minerals 11, no. 11 (2021): 1229. http://dx.doi.org/10.3390/min11111229.

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Diamond etching in high-temperature ambient-pressure experiments has been performed aimed to assess possible postimpact effects on diamonds in impact craters, for the case of the Popigai crater in Yakutia (Russia). The experiments with different etchants, including various combinations of silicate melts, air, and inert gases, demonstrated the diversity of microstructures on {111} diamond faces: negative or positive trigons, as well as hexagonal, round, or irregularly shaped etch pits and striation. The surface features obtained after etching experiments with kimberlitic diamonds are similar to

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Takahashi, Mamoru, Tatsuya Fujita, Takahito Yanagi, Riki Suzuki, and Osamu Kamiya. "Influence of Substrate Surface Roughness on Synthesized Diamond Films by Flame Combustion on Ti Substrate for Dental Implants." Journal of Materials and Applications 11, no. 1 (2022): 17–26. http://dx.doi.org/10.32732/jma.2022.11.1.17.

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The flame combustion method enables the synthesis of diamonds via acetylene-oxygen gas flame combustion in ambient air, and this method has various advantages over other methods. However, most diamond films synthesized by this method delaminate because of thermal stress during cooling. Titanium (Ti) has recently been utilized as a dental implant in the dental industry. In this study, to improve the strength, wear resistance, and biocompatibility of dental implant surfaces, diamond films were synthesized on a Ti substrate, a dental implant material, by the flame combustion method. Moreover, to

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Wang, Yifan, Jun Yu, and Zhanshan Wang. "Surface quality improvement at selective laser melting AlSi₁₀Mg by optimizing single point diamond turning parameters." Materials Testing 65, no. 1 (2023): 63–76. http://dx.doi.org/10.1515/mt-2022-0217.

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Abstract Selective laser melting allows aluminum-silicon alloy mirrors further lightweight for aerospace applications. The reflective surfaces based on Selective laser melting aluminum-silicon alloy substrates are commonly machined by single point diamond turning. However, many surface defects on single point diamond turning machined surfaces may limit their direct applications in optical system. In the paper, single point diamond turning parameters (cutting depth, feed rate, and cutting speed) are optimized orderly to improve its surface quality. The single point diamond turning machined surf

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Murakami, Riichi, Shinichiro Fukui, Daisuke Yonekura, and Cheolmun Yim. "Study of Boron-Doped Diamond Films by Microwave Plasma CVD Method." Key Engineering Materials 353-358 (September 2007): 1883–86. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.1883.

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Boron-doped diamonds were deposited by microwave plasma chemical vapor deposition (MPCVD) method in order to investigate the influence of inlet boron concentration on the film properties. The substrate material of the specimens was pure titanium (99.9 %). Boron source was introduced into the vacuum chamber by bubbling of B2O3, acetone and methanol mixture. Samples were produced with different B2O3 concentrations in mixture (1000 ppm, 5000 ppm, and 10000 ppm). The surface morphology of the samples was observed by scanning electron microscope (SEM). X-ray diffraction was used to identify crystal

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Łoś, Szymon, Kazimierz Fabisiak, Kazimierz Paprocki, Mirosław Szybowicz, and Anna Dychalska. "The Undoped Polycrystalline Diamond Film—Electrical Transport Properties." Sensors 21, no. 18 (2021): 6113. http://dx.doi.org/10.3390/s21186113.

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The polycrystalline diamonds were synthesized on n-type single crystalline Si wafer by Hot Filament CVD method. The structural properties of the obtained diamond films were checked by X-ray diffraction and Raman spectroscopy. The conductivity of n-Si/p-diamond, sandwiched between two electrodes, was measured in the temperature range of 90–300 K in a closed cycle cryostat under vacuum. In the temperature range of (200–300 K), the experimental data of the conductivity were used to obtain the activation energies Ea which comes out to be in the range of 60–228 meV. In the low temperature region i.

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Kobashi, Koji, Takeshi Tachibana, Yoshihiro Yokota, et al. "Fibrous structures on diamond and carbon surfaces formed by hydrogen plasma under direct-current bias and field electron-emission properties." Journal of Materials Research 18, no. 2 (2003): 305–26. http://dx.doi.org/10.1557/jmr.2003.0042.

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Polycrystalline diamond films, single crystal bulk diamonds, and diamond powder were treated in microwave plasma of hydrogen at 1.6 torr under a negative direct-current bias of −150 to −300 V without metal catalyst. It was found that fibrous structures, uniformly elongated along the direction normal to the specimen surface, were formed on the diamond surfaces. Similar experiments for glasslike carbon resulted in conical structures with frizzy fibers at the tops. Transmission electron microscopy measurements indicated that the fibers formed on diamond consisted of randomly oriented diamond nano

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48

Ishutin, I. A., A. A. Chepurov, and E. I. Zhimulev. "Experimental Study of Surface Etching in Synthetic Diamond Microcrystals due to Presence of Cu and Fe at High Pressure." Izvestiya of Altai State University, no. 1(111) (March 6, 2020): 18–21. http://dx.doi.org/10.14258/izvasu(2020)1-02.

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In the present work, microcrystals of synthetic diamond extracted from a metal-diamond composite were investigated. A composite based on Cu and Fe was obtained by sintering at a pressure of 4 GPa and a temperature of1300 °C. The experiments were carried out using a split-sphere high-pressure apparatus BARS. The high-pressure cell was made of refractory oxides ZrO2, CaO, and MgO using a tubular graphite heater. In the composite, diamond grains were in close contact with neighboring diamonds, and the metal phase filled the interstices. The study of the diamond crystals demonstrated the appearanc

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Xia, Yue, Yunxiang Lu, Guoyong Yang, et al. "Application of Nano-Crystalline Diamond in Tribology." Materials 16, no. 7 (2023): 2710. http://dx.doi.org/10.3390/ma16072710.

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Nano-crystalline diamond has been extensively researched and applied in the fields of tribology, optics, quantum information and biomedicine. In virtue of its hardness, the highest in natural materials, diamond outperforms the other materials in terms of wear resistance. Compared to traditional single-crystalline and poly-crystalline diamonds, nano-crystalline diamond consists of disordered grains and thus possesses good toughness and self-sharpening. These merits render nano-crystalline diamonds to have great potential in tribology. Moreover, the re-nucleation of nano-crystalline diamond duri

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50

Sonin, V. M., I. A. Gryaznov, E. I. Zhimulev, and A. I. Chepurov. "MORPHOLOGICAL FEATURES OF GRAPHITE MANIFESTATION IN EXPERIMENTS WITH SURFACE GRAPHITIZATION OF SYNTHETIC DIAMONDS." Geology and mineral resources of Siberia, no. 4a (December 2024): 56–62. https://doi.org/10.20403/2078-0575-2024-4a-56-62.

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The results of studying the surface graphitization of diamonds by optical and scanning electron microscopy in various experimentally realized conditions are presented: at 2–4 GPa, 1450–1550 °C in carbonate medium and at 1000 °C and atmospheric pressure in a flowing medium of wet argon. It is determined that a dense optically opaque shell is formed on diamond crystals in a carbonate medium. As a result of an oxidation in wet argon, the surface graphite forms an unequal translucent film on diamond crystals. The represented conditions at high P-T parameters in a carbonate medium simulate the pres

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