Diamond and Related Materials最新文献

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Response surface methodology based optimization of graphene oxide dosage in reactive powder concrete for strength enhancement 基于响应面法的活性粉末混凝土氧化石墨烯掺量优化研究
IF 5.1 3区 材料科学
Diamond and Related Materials Pub Date : 2025-08-27 DOI: 10.1016/j.diamond.2025.112788
M. Selvakumar, S. Geetha, B. Harish
{"title":"Response surface methodology based optimization of graphene oxide dosage in reactive powder concrete for strength enhancement","authors":"M. Selvakumar,&nbsp;S. Geetha,&nbsp;B. Harish","doi":"10.1016/j.diamond.2025.112788","DOIUrl":"10.1016/j.diamond.2025.112788","url":null,"abstract":"<div><div>This study reports a nano-modified Reactive Powder Concrete (RPC) with Graphene Oxide (GO) and steel sludge powder (SSP) for improved mechanical performance, durability, and microstructural properties. Several samples were made with different percentages of GO and were comparatively studied with respect to traditional RPC. The study ensured a well-graded particle size distribution with cement (&lt;70 μm), silica fume (&lt;1 μm), quartz sand (150–300 μm), and steel sludge powder (∼300 μm) to obtain the optimum densification. Steel sludge powder was added as an additional material to improve sustainability. Experimental investigations included workability testing, compressive strength, flexural strength testing, and durability testing, including sorptivity and rapid chloride permeability. Microstructural analysis was performed to find out the internal matrix refinement. The findings revealed that a 0.09 % addition of GO improved compressive strength to 85 MPa compared to the normal RPC compressive strength of 48.7 MPa. Similarly, flexural strength was enhanced from 4.6 MPa (normal) to 8.32 MPa for RPC with GO. The findings suggest that the optimal percentage of nanoparticles in dispersion is a prerequisite for property improvement in RPC, and excessive use may lead to negative performance.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112788"},"PeriodicalIF":5.1,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144911865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reduced graphene oxide nanosheets supported platinum nanoparticles with enhanced mass activity for efficient hydrogen evolution 还原氧化石墨烯纳米片支持的铂纳米颗粒具有增强的质量活性,用于有效的析氢
IF 5.1 3区 材料科学
Diamond and Related Materials Pub Date : 2025-08-27 DOI: 10.1016/j.diamond.2025.112778
Khaled M. AlAqad
{"title":"Reduced graphene oxide nanosheets supported platinum nanoparticles with enhanced mass activity for efficient hydrogen evolution","authors":"Khaled M. AlAqad","doi":"10.1016/j.diamond.2025.112778","DOIUrl":"10.1016/j.diamond.2025.112778","url":null,"abstract":"<div><div>One strategy is synthesizing a low-loading platinum-based electrocatalyst and enhancing platinum utilization efficiency. In this study, platinum nanoparticles (Pt NPs) were embedded onto the reduced graphene oxide (rGO) nanosheet surface using solvothermal and chemical reduction processes. The experimental results illustrated that the developed Pt NPs/rGO NSs, which exhibit superior HER activity and excellent stability, require only a low Pt loading of 9.6 % wt. The fabricated Pt NPs@rGO demonstrated an overpotential of 27 mV, reaching a current density of 10 mA cm<sup>−2</sup> with a lower Tafel slope of 34 mV dec<sup>−1</sup> and high turnover frequency (0.25 s<sup>−1</sup>) in 0.5 M H<sub>2</sub>SO<sub>4</sub>. The HER performance of the Pt NPs@rGO electrocatalyst surpassed that of Pt without rGO (80 mV) and Pt/C (46 mV) electrodes. This enhancement may be due to the formation of Pt<img>O bonding on the rGO surface, leading to increased H atom adsorption. Furthermore, the strong electronic coupling between the Pt NPs and the rGO support is more favorable than that between Pt NPs and the carbon support (Pt/C, 20 % wt.). Notably, the mass activity of Pt NPs@rGO (143 mA mg<sup>−1</sup>) is 8-times greater than that of Pt/C (20 % wt.) (18 mA mg<sup>−1</sup>) at an overpotential of 27 mV, demonstrating that low-loading Pt NPs onto the rGO surface is more efficient than that of the benchmark Pt/C (20 % wt.). Impedance spectroscopy confirmed a strong electronic coupling between Pt NPs and rGO NSs, leading to high HER performance and fast electron mobility and charge transfer kinetics. The Pt NPs@rGO also exhibited excellent long-term stability over 24 h, indicating robust electronic interaction between Pt and rGO. The superior HER activity of the Pt NPs@rGO electrocatalyst is ascribed to the suitability of rGO as a support.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112778"},"PeriodicalIF":5.1,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144911780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Improved energy storage performance of NiS2/CoNi2S4 heterostructure with reduced graphene oxide and carbon nanofiber synergistic optimization for hybrid supercapacitor 还原氧化石墨烯与碳纳米纤维协同优化混合超级电容器NiS2/CoNi2S4异质结构储能性能
IF 5.1 3区 材料科学
Diamond and Related Materials Pub Date : 2025-08-27 DOI: 10.1016/j.diamond.2025.112782
Chunyan Sun , Weiyang Zhang , Zhengyan Gu , Xiaona Li , Hongwei Kang , Zijiong Li , Zhikun Li
{"title":"Improved energy storage performance of NiS2/CoNi2S4 heterostructure with reduced graphene oxide and carbon nanofiber synergistic optimization for hybrid supercapacitor","authors":"Chunyan Sun ,&nbsp;Weiyang Zhang ,&nbsp;Zhengyan Gu ,&nbsp;Xiaona Li ,&nbsp;Hongwei Kang ,&nbsp;Zijiong Li ,&nbsp;Zhikun Li","doi":"10.1016/j.diamond.2025.112782","DOIUrl":"10.1016/j.diamond.2025.112782","url":null,"abstract":"<div><div>Developing excellent electrode materials have been one of the unremitting pursuits to promote the widespread application of high-performance energy storage devices for clean and renewable energy. This work rationally designed a novel nanocomposite (NiS<sub>2</sub>/CoNi<sub>2</sub>S<sub>4</sub>/RGO/CNFs, denoted as NCNS@R/C) by introducing carbon nanofibers (CNFs) and reduced graphene oxide (RGO) nanosheets to synergistically optimize NiS<sub>2</sub>/CoNi<sub>2</sub>S<sub>4</sub> heterostructure via a simple hydrothermal route. Owing to the CNFs and RGO with high conductivity and high specific surface area co-construct hierarchical porous network nanostructures, which not only helps to obtain excellent charge transport and ion diffusion kinetics, but also promotes the generated dispersion-anchored NiS<sub>2</sub>/CoNi<sub>2</sub>S<sub>4</sub> nanoparticles to present abundant exposed electroactive sites. Consequently, the NCNS@R/C electrode exhibits superior energy storage properties than the NCNS@R and NCNS@C electrodes, including high specific capacitance of 1577.7 F g<sup>−1</sup> at 0.8 A g<sup>−1</sup> and excellent rate performance (77.1 %, 0.8 → 20 A g<sup>−1</sup>). Excitingly, the designed NCNS@R/C//AC hybrid supercapacitor exhibits a promising energy density of 51.4 Wh kg<sup>−1</sup> at power density of 418.3 W kg<sup>−1</sup> and an ultra-long cycle durability with 83.78 % capacitance retention after 26,000 cycles. These results demonstrate that the NCNS@R/C nanocomposite exhibits excellent electrochemical energy storage performance, and shows good application potential in low-cost, long-life and high-efficiency hybrid supercapacitors.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112782"},"PeriodicalIF":5.1,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144920042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Efficient phosphorus doping on diamond (113) surface by applying tensile strain: first principles calculation 应用拉伸应变在金刚石(113)表面有效掺杂磷:第一性原理计算
IF 5.1 3区 材料科学
Diamond and Related Materials Pub Date : 2025-08-27 DOI: 10.1016/j.diamond.2025.112790
Cong Li, Liuan Li, Nan Gao, Hongdong Li
{"title":"Efficient phosphorus doping on diamond (113) surface by applying tensile strain: first principles calculation","authors":"Cong Li,&nbsp;Liuan Li,&nbsp;Nan Gao,&nbsp;Hongdong Li","doi":"10.1016/j.diamond.2025.112790","DOIUrl":"10.1016/j.diamond.2025.112790","url":null,"abstract":"<div><div>Phosphorus (P) doping is the most reliable n-type dopant in diamond, while the low solubility of P dopant limits its application. In order to solve this disadvantage, the formation energy values for P doping in pristine, hydrogenated and oxidized diamond (100), (110), (111) and (113) surfaces are systematically studied by first-principles calculation. The results show that the formation energy for diamond (113) surface is smaller than that of diamond (100), (110) and (111) surfaces, indicating its highest P doping efficiency. In addition, the tensile strain significantly reduces the formation energy of P-doped diamond surface, thus the doping efficiency improves. These findings provide new directions for the realization of P-doped n-type diamond and help in the design of diamond-based semiconductor devices.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112790"},"PeriodicalIF":5.1,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144921340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nanoplates of MWCNT_V2O5 nanocomposites using hydrothermal method for energy storage application 水热法制备MWCNT_V2O5纳米复合材料的纳米片用于储能
IF 5.1 3区 材料科学
Diamond and Related Materials Pub Date : 2025-08-27 DOI: 10.1016/j.diamond.2025.112770
Rupin Ranu , Swapnil R. Bhosale , M.A. Yewale , S.L. Kadam , Kalyan B. Chavan , Nandu B. Chaure
{"title":"Nanoplates of MWCNT_V2O5 nanocomposites using hydrothermal method for energy storage application","authors":"Rupin Ranu ,&nbsp;Swapnil R. Bhosale ,&nbsp;M.A. Yewale ,&nbsp;S.L. Kadam ,&nbsp;Kalyan B. Chavan ,&nbsp;Nandu B. Chaure","doi":"10.1016/j.diamond.2025.112770","DOIUrl":"10.1016/j.diamond.2025.112770","url":null,"abstract":"<div><div>Vanadium Pentoxide (V<sub>2</sub>O<sub>5</sub>) is a versatile material for energy storage applications due to its appealing properties such as band gap and crystal structure. In this study, we used the hydrothermal technique to create Multi walled Carbon Nanotube (MWCNT) doped V<sub>2</sub>O<sub>5</sub> nanomaterials. The doping of V<sub>2</sub>O<sub>5</sub> synthesis uses multi-walled carbon nanotubes (MWCNT) ranging from 2 to 8 atomic percent. The concentration of vanadium source, reaction temperature, and reaction time were maintained at 0.14 M, 180 °C, and 6 h, respectively. A structural, morphological, elemental, and electrochemical examination was carried out, followed by 5 h of air ambient annealing at 500 °C. Comprehensive XRD analysis using multiple models (Scherrer, Monshi-Scherrer, Williamson–Hall UDM/USDM/UDEDM, Halder–Wagner, Wagner–Aqua, and Size–Strain) revealed that crystallite size decreased from 38.45 nm (0 at.%) to 34.97 nm (2 at.%) due to enhanced nucleation, then increased to 38.22 nm (8 at.%) owing to crystal growth and agglomeration. Microstrain showed an inverse trend, reaching a minimum of 2.85 × 10<sup>−3</sup> at 4 at.% doping. TEM confirmed the orthorhombic structure with clear (200) lattice fringes (∼5.76 Å), and FESEM showed uniform nanoplate morphology (∼115 nm thickness) largely unaffected by doping level. FTIR spectra indicated preserved V₂O₅ bonding with evidence of interfacial interactions at higher MWCNT content. Electrochemical evaluation demonstrated that 8 at.% MWCNT doping yielded a fourfold increase in specific capacitance (259 → 607.14 F/g) and energy density (36 → 84.32 Wh/kg), along with a marked reduction in charge transfer resistance (R₁ from 26.48 Ω to 3.58 Ω; R₃ from 919 Ω to 1.85 Ω). The composite retained 87.74 % capacitance after 10,000 cycles, confirming excellent durability. These results highlight the role of optimal MWCNT incorporation (6–8 at.%) in enhancing microstructural features, electrical conductivity, and charge storage performance, establishing MWCNT–V₂O₅ nanocomposites as promising candidates for high-performance supercapacitor electrodes.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112770"},"PeriodicalIF":5.1,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144996292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of microstructure evolution in ultra-thick diamonds on high-quality polishing 超厚金刚石微观结构演变对高质量抛光的影响
IF 5.1 3区 材料科学
Diamond and Related Materials Pub Date : 2025-08-27 DOI: 10.1016/j.diamond.2025.112777
Yongkang Zhang , Kang An , Shiyu Ji , Lijun Li , Yachen Zhang , Guangyu Xu , Meiling Ren , Nawei Xiao , Mengxin Wang , Zichao Li , Fengbin Liu , Chengming Li
{"title":"Effect of microstructure evolution in ultra-thick diamonds on high-quality polishing","authors":"Yongkang Zhang ,&nbsp;Kang An ,&nbsp;Shiyu Ji ,&nbsp;Lijun Li ,&nbsp;Yachen Zhang ,&nbsp;Guangyu Xu ,&nbsp;Meiling Ren ,&nbsp;Nawei Xiao ,&nbsp;Mengxin Wang ,&nbsp;Zichao Li ,&nbsp;Fengbin Liu ,&nbsp;Chengming Li","doi":"10.1016/j.diamond.2025.112777","DOIUrl":"10.1016/j.diamond.2025.112777","url":null,"abstract":"<div><div>Ultra-thick diamond films (&gt;3 mm) compliant with ISO 14704 were fabricated via Direct Current Arc Plasma Jet Chemical Vapor Deposition (DC Arc Plasma Jet CVD). Multiple characterization techniques, including X-ray Diffraction (XRD), Scanning Electron Microscope (SEM), Electron Back Scatter Diffraction (EBSD), Optical Microscope (OM), Laser Scanning Confocal Microscopy (LSCM) and Atomic Force Microscope (AFM), were employed to systematically investigate the correlations between microstructure evolution, black defects (growth pores), and polishing quality (surface roughness) on the growth surfaces of ultra-thick diamonds. As diamond film thickness increases, the preferred orientation transitions from {111} to {110} planes. This shift primarily results from twins-induced lattice stacking variations that induce orientation dispersion, coupled with the cooperative effects of twins-induced randomization (Σ3 twins &gt;52 %) and Ostwald Ripening. Ostwald Ripening facilitates the consumption of disadvantageously oriented grains by {110}-oriented grains. Under the OM, the area of black defects (growth pores) first increases, then decreases, and subsequently increases again, peaking at thicknesses of 1700 μm and 3000 μm. This fluctuation in defect content is directly correlated with variations in polishing quality. Through crystallographic evolution and surface integrity analysis of DC Arc Plasma Jet CVD diamond films (&gt;3 mm), this study establishes the correlation between microstructure gradients, pore distribution, and polishing quality. These findings provide a theoretical foundation for engineering applications of ultra-thick diamond.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112777"},"PeriodicalIF":5.1,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144920043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synergistic integration of 3D-ZnTb₂O₄@1D-CNT@2D-rGO: A multi-dimensional hybrid electrode on carbon paper for highly-efficient energy and HER catalysis applications 3D-ZnTb₂O₄@1D-CNT@2D-rGO的协同集成:用于高效能源和HER催化应用的碳纸上的多维杂化电极
IF 5.1 3区 材料科学
Diamond and Related Materials Pub Date : 2025-08-27 DOI: 10.1016/j.diamond.2025.112784
Sohail Mumtaz , Muhammad Azhar Mumtaz , Abhinav Kumar , Z. Chine , A.M. Afzal , M.A. Diab , Heba A. El-Sabban
{"title":"Synergistic integration of 3D-ZnTb₂O₄@1D-CNT@2D-rGO: A multi-dimensional hybrid electrode on carbon paper for highly-efficient energy and HER catalysis applications","authors":"Sohail Mumtaz ,&nbsp;Muhammad Azhar Mumtaz ,&nbsp;Abhinav Kumar ,&nbsp;Z. Chine ,&nbsp;A.M. Afzal ,&nbsp;M.A. Diab ,&nbsp;Heba A. El-Sabban","doi":"10.1016/j.diamond.2025.112784","DOIUrl":"10.1016/j.diamond.2025.112784","url":null,"abstract":"<div><div>The enormous demand for energy in the current era has sparked significant interest in asymmetric hybrid devices (AHDs) owing to the characteristics of the battery and supercapacitor. Here, a composite of zinc terbium oxide (ZnTb<sub>2</sub>O<sub>4</sub>), multi-walled carbon nanotubes (MWCNTs), and reduced graphene oxide (rGO), is synthesized utilizing a hydrothermal process. The material demonstrated its battery-grade nature and excellent performance with a specific capacity (Q<sub>s</sub>) of 1388.6C/g. A hybrid device (ZnTb<sub>2</sub>O<sub>4</sub>@rGO@CNT//AC) showed a maximum Q<sub>s</sub> of 201.7C/g because of the synergistic effect. The asymmetric hybrid energy storage device revealed a maximum power density (P<sub>d</sub>) of 2695.7 W/kg and energy density (E<sub>d</sub>) of 84.6 Wh/Kg with high capacity retention of 94 % after 10,000 charging and discharging cycles. The ZnTb<sub>2</sub>O<sub>4</sub>@rGO@CNT electrode is utilized in the hydrogen evolution reaction (HER) application. The hybrid electrode showed a better value of overpotential and Tafel slope of 49 mV and 51 mV/dec, respectively. This work introduces a new hybrid material to meet the need for more E<sub>d</sub> and higher P<sub>d</sub> in AHDs, and it can be used as an effective electrocatalyst.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112784"},"PeriodicalIF":5.1,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144996269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comprehensive characterization of DLC films: Comparative insights from NEXAFS and SXES DLC薄膜的综合表征:NEXAFS和SXES的比较见解
IF 5.1 3区 材料科学
Diamond and Related Materials Pub Date : 2025-08-26 DOI: 10.1016/j.diamond.2025.112762
Thitikorn Chamchuang , Tsuneo Suzuki , Sarayut Tunmee , Praphaphon Silawong , Peng Guo , Aiying Wang , Kazuhiro Kanda , Keiji Komatsu , Hidetoshi Saitoh
{"title":"Comprehensive characterization of DLC films: Comparative insights from NEXAFS and SXES","authors":"Thitikorn Chamchuang ,&nbsp;Tsuneo Suzuki ,&nbsp;Sarayut Tunmee ,&nbsp;Praphaphon Silawong ,&nbsp;Peng Guo ,&nbsp;Aiying Wang ,&nbsp;Kazuhiro Kanda ,&nbsp;Keiji Komatsu ,&nbsp;Hidetoshi Saitoh","doi":"10.1016/j.diamond.2025.112762","DOIUrl":"10.1016/j.diamond.2025.112762","url":null,"abstract":"<div><div>Our study focuses on the comparative insights gained from near-edge X-ray absorption fine structure (NEXAFS) and soft X-ray emission spectroscopy (SXES) techniques in the comprehensive characterization of diamond-like carbon (DLC) films. Understanding the quantitative determination of carbon hybridization is essential for unraveling the relationships between structure and properties in carbon-based materials, including DLC films. Although several technologies exist for characterizing the <em>sp</em><sup>3</sup> and <em>sp</em><sup>2</sup> carbon content in these materials, our study reveals that direct comparisons of analytical results are limited, highlighting the need for further research and development in this area. This study compares NEXAFS spectra with SXES data for a range of amorphous carbon coatings, including both hydrogen-free and hydrogenated DLC films with varying hydrogen content levels. Our findings highlight the crucial role of hydrogen in modifying the local electronic structure and the <em>sp</em><sup>3</sup>/<em>sp</em><sup>2</sup> ratios, which have a significant impact on the properties of the films. Films with low hydrogen content demonstrated strong agreement between NEXAFS and SXES results, while hydrogen-rich films exhibited discrepancies due to the influence of hydrogen on the electronic structure. These results highlight the importance of precise characterization and deposition control in the creation of DLC films for advanced applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112762"},"PeriodicalIF":5.1,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144917676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Discharge-induced graphitization of monocrystalline diamond: A spark erosion approach for BMD and non-conductive MCD 放电诱导单晶金刚石石墨化:一种用于BMD和非导电MCD的火花侵蚀方法
IF 5.1 3区 材料科学
Diamond and Related Materials Pub Date : 2025-08-25 DOI: 10.1016/j.diamond.2025.112774
Shun-Tong Chen , Yu-Hao Lin
{"title":"Discharge-induced graphitization of monocrystalline diamond: A spark erosion approach for BMD and non-conductive MCD","authors":"Shun-Tong Chen ,&nbsp;Yu-Hao Lin","doi":"10.1016/j.diamond.2025.112774","DOIUrl":"10.1016/j.diamond.2025.112774","url":null,"abstract":"<div><div>Monocrystalline diamond (MCD), a superhard material widely used in various industrial applications due to its exceptional mechanical, physical, and chemical properties, is considered a key material for next-generation technologies. To enable cost-effective machining of MCD, a discharge-induced graphitization method using electrical discharge machining (EDM) is proposed. A resistance-capacitance pulse-width modulation (RC-PWM) discharge power source is designed to support this process. By adjusting the duty ratio of the discharge pulse train, the RC-PWM power source delivers the required working energy, allowing MCD to be machined at its breakdown voltage while minimizing excessive thermal damage. An instantaneous voltage detection method is introduced to autonomously regulate the wire-electrode feed-rate, effectively preventing short-circuits and electrode breakage. The electrical discharge processability (EDP) of MCD is evaluated through the spark erosion rate (SER) achieved with the RC-PWM discharge power source. During the machining of boron-doped monocrystalline diamond (BMD), the formation of a graphite deposition layer and discharge debris enables continuous EDM of otherwise non-conductive MCD. Experimental results show that BMD and non-conductive MCD can be machined at a discharge frequency of 300 kHz, with optimal pulse-on-time ratios of 30 % and 40 %, respectively. Four material removal mechanisms: erosion, vaporization, vaporization with erosion, and ablation are identified in BMD. In contrast, only vaporization and ablation occur in non-conductive MCD due to the absence of conductive charge carriers. This study presents a cost-effective and technically promising approach for the EDM processing of non-conductive diamond materials, with potential for technological autonomy and future commercialization.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112774"},"PeriodicalIF":5.1,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144917680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Controlled synthesis and mechanistic study of B, N and Si multi-doped diamond films using liquid carbon source precursors via HFCVD method 液相碳源前驱体HFCVD法控制合成B、N、Si多掺杂金刚石薄膜及其机理研究
IF 5.1 3区 材料科学
Diamond and Related Materials Pub Date : 2025-08-25 DOI: 10.1016/j.diamond.2025.112775
Ming Lu , Yongguo Wang , Fanghong Sun
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