Journal of Superhard Materials最新文献

Inclusions of Manganese and Manganese–Nickel Compounds in Microdiamonds from Various Rocks on the Ukrainian Shield 乌克兰盾上不同岩石微金刚石中锰和锰镍化合物的包裹体

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2026-09-09 DOI: 10.3103/S1063457626040106

O. A. Vyshnevskyi, V. M. Kvasnytsya, R. Wirth, O. V. Pavliuk, A. Schriber

{"title":"Inclusions of Manganese and Manganese–Nickel Compounds in Microdiamonds from Various Rocks on the Ukrainian Shield","authors":"O. A. Vyshnevskyi, V. M. Kvasnytsya, R. Wirth, O. V. Pavliuk, A. Schriber","doi":"10.3103/S1063457626040106","DOIUrl":"10.3103/S1063457626040106","url":null,"abstract":"Unusual inclusions of manganese and manganese-nickel compounds in microdiamonds (0.3–0.5 mm) of unknown origin, picked up from geological samples of various rocks on the Ukrainian Shield, have been studied by transmission electron microscopy. These microdiamonds are planohedral crystals of cubo-octahedral and cubic shape. Most of the inclusions have rounded irregular shapes and their size is in the range of ten to a few hundred nm. They have been identified based on their chemical composition and diffraction patterns as Mn-silicates, Mn-oxides, Mn–Ni and Mn–Ni–Si compounds of varying composition, graphite and KCl. In terms of crystal shape, phase and composition of inclusions, the studied diamonds are completely different from natural ones, but very similar to synthetic diamonds, grown at high pressure—high temperature in the Mn–Ni–C system at the Institute of Superhard Materials of the National Academy of Sciences of Ukraine (Kyiv). Given this, it is concluded that they are synthetic and most likely originate from diamond tools used during the collecting and processing of rock samples.","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"48 4","pages":"290 - 299"},"PeriodicalIF":1.2,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148909724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Studying the Structure and Mechanical Properties of AlN–С–TiB2 Ceramic Composites AlN -С-TiB2陶瓷复合材料的结构与力学性能研究

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2026-09-09 DOI: 10.3103/S1063457626040064

T. B. Serbeniuk, T. O. Prikhna, V. B. Sverdun, V. E. Moshchil, M. V. Karpets, A. A. Marchenko, V. V. Bilorusets, S. P. Starik

引用次数: 0

Construction of a Synergistic Etching System Based on Fe2O3–Si Highly Exothermic Reaction and Its Mechanism in Diamond Surface Etching 基于Fe2O3-Si高放热反应的协同蚀刻体系的构建及其在金刚石表面蚀刻中的机理

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2026-09-09 DOI: 10.3103/S106345762604009X

Chang Hong Sun, Zi Yang Ding, Cui Lyu, Bao Yan Liang

{"title":"Construction of a Synergistic Etching System Based on Fe2O3–Si Highly Exothermic Reaction and Its Mechanism in Diamond Surface Etching","authors":"Chang Hong Sun, Zi Yang Ding, Cui Lyu, Bao Yan Liang","doi":"10.3103/S106345762604009X","DOIUrl":"10.3103/S106345762604009X","url":null,"abstract":"The etching behavior, mechanism, and efficiency of diamond were systematically compared for the silicon-thermal method and direct etching using pure Fe powder or Fe2O3₂O₃ alone. XRD, SEM, and thermodynamic analyses showed that the silicon-thermal reaction system (Fe2O3–Si), owing to its strong exothermic effect (ΔH ≈ –1070 kJ mol–1), generated an active high-temperature etching medium in situ, dominated by Fe and FeO and accompanied by the formation of silicates. Together, they created a dynamic etching environment described as “high-enthalpy-driven multiphase coupling catalysis-dissolution-migration”. The introduction of CaO further led to the formation of Ca2SiO4, which significantly enhanced the etching effect by stabilizing the FeO phase and improving mass transport, particularly inducing complex and deep etch morphologies on the diamond (111) planes and grain boundaries. Experiments demonstrated that the etching efficacy of the silicon-thermal method was significantly superior to the mild etching achieved by pure Fe or Fe2O3 alone. This research provides a new strategy based on silicon-thermal reduction for the efficient and deep surface processing of diamond.","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"48 4","pages":"280 - 289"},"PeriodicalIF":1.2,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148909675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Trigonal (sp2) and Tetrahedral (sp3) Original C12 Orthorhombic Allotropes with Super-Hard Behavior; Crystal Engineering and DFT Studies 具有超硬行为的三角形（sp2）和四面体（sp3）原C12正交同素异形体晶体工程与DFT研究

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2026-09-09 DOI: 10.3103/S1063457626040039

Samir F. Matar

引用次数: 0

Melting of B12As2 Boron Subarsenide under Pressure 压力下B12As2亚砷化硼的熔化

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2026-09-09 DOI: 10.3103/S1063457626040076

V. L. Solozhenko

引用次数: 0

Effect of Ni, Co, and W on the Reaction Sintering of cBN Composites Ni、Co和W对cBN复合材料反应烧结的影响

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2026-09-09 DOI: 10.3103/S1063457626040088

D. A. Stratiichuk, N. M. Belyavina, V. Z. Turkevich, S. P. Starik, Ya. M. Romanenko

引用次数: 0

Effect of Surface Geometry on Surface-Layer Formation during Polishing of Copper Optical Components 表面几何形状对铜光学元件抛光过程中表层形成的影响

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2026-09-09 DOI: 10.3103/S1063457626040027

Yu. D. Filatov

{"title":"Effect of Surface Geometry on Surface-Layer Formation during Polishing of Copper Optical Components","authors":"Yu. D. Filatov","doi":"10.3103/S1063457626040027","DOIUrl":"10.3103/S1063457626040027","url":null,"abstract":"Based on an investigation of the scattering behavior of sludge nanoparticles and wear nanoparticles originating from the polishing powder during the polishing of copper optical components using a dispersed system of micro- and nanopowders of copper metaborate in kerosene, as well as the formation of a deposit composed of copper oxide nanoparticles on the polished surface, it was established that the dependence of the total scattering cross section of sludge nanoparticles on the radius of the circular zones of the component is characterized by maximum values at radii of 10, 15, 17.5, and 20 mm. These maxima correspond to the highest probability of deposit formation on the processed surface, specifically within these circular zones. Investigation of the influence of the emergent properties of quantum sludge nanoparticles and polishing powder wear nanoparticles on their collective behavior, self-organization, and assembly during motion within an optical resonator of variable length formed by the surfaces of the workpiece and the polishing lap demonstrated that a deposit composed of sludge nanoparticles forms on the processed surface of the copper component. Fragments of this deposit are discretely distributed along concentric circles whose radii coincide with the values calculated using the quantum theory of nanoparticle scattering. It was further shown that, during the polishing of copper optical components using micro- and nanopowders of copper metaborate dispersed in kerosene, the material removal rate reaches 28.6 × 10–13 m3/s, which is in good agreement with the experimentally determined polishing productivity of 1.5 ± 0.1 mg/min, or 7.3 ± 0.4 μm/h, or (28 ± 1) × 10–13 m3/s, with a deviation of 5–6%. Experimental observations confirmed that the deposit composed of sludge nanoparticles, whose fragments consisted of copper oxide, was indeed present on the polished copper surface along concentric circles with radii of 10 and 15 mm, as well as within the circular zone having a radius of 17–20 mm.","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"48 4","pages":"300 - 309"},"PeriodicalIF":1.2,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148909769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Performance Characteristics of a Grinding Tool Using Diamond Abrasive Powders with a cBN Coating on the Surface of Their Grains in the Cutting Layer 金刚石磨料粉末切削层表面涂层cBN磨具的性能特性

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2026-09-09 DOI: 10.3103/S1063457626040052

G. A. Petasyuk, O. O. Bochechka, V. І. Lavrinenko, V. G. Poltoratskyi, V. V. Smokvyna, V. V. Bilorusets, L. A. Prots

{"title":"Performance Characteristics of a Grinding Tool Using Diamond Abrasive Powders with a cBN Coating on the Surface of Their Grains in the Cutting Layer","authors":"G. A. Petasyuk, O. O. Bochechka, V. І. Lavrinenko, V. G. Poltoratskyi, V. V. Smokvyna, V. V. Bilorusets, L. A. Prots","doi":"10.3103/S1063457626040052","DOIUrl":"10.3103/S1063457626040052","url":null,"abstract":"The current papers on the surface modification of diamond grinding powder grains by applying cubic boron nitride (cBN) coatings to them are reviewed. The results of these studies indicate the efficiency of such modification and the positive impact of cBN films on diamond surfaces. It was found that the best binder for cBN coating is gelatin, while glue BF6 and polyvinyl alcohol (PVA) are approximately the same, though PVA is better at a lower material removal rate, and glue BF6 is more advisable, when the material removal rate is higher. Performed studies show that, from the technological viewpoint, PVA is preferable for coatings, especially when they contain nanosized cubic boron nitride (nano-cBN). It was established that the deposition of a coating containing nano-cBN to the surface of high-strength diamond grains AC15–AC20 significantly increases the wear resistance of diamond wheels, presumably, due to the improved retention of diamond grains in the binding material.","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"48 4","pages":"310 - 318"},"PeriodicalIF":1.2,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148909676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

First-Principles Study of the Mechanical Properties of (Ti, W)C Solid Solutions （Ti， W）C固溶体力学性能的第一性原理研究

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2026-09-09 DOI: 10.3103/S1063457626040040

O. O. Matviichuk, P. M. Prysyazhnyuk, V. O. Kotsyubynsky, V. V. Tataryn, L. Ya. Ropyak, I. V. Savchuk, V. Z. Turkevych

{"title":"First-Principles Study of the Mechanical Properties of (Ti, W)C Solid Solutions","authors":"O. O. Matviichuk, P. M. Prysyazhnyuk, V. O. Kotsyubynsky, V. V. Tataryn, L. Ya. Ropyak, I. V. Savchuk, V. Z. Turkevych","doi":"10.3103/S1063457626040040","DOIUrl":"10.3103/S1063457626040040","url":null,"abstract":"The phase stability, mechanical properties, and electronic structure of (Ti, W)C solid solutions are computationally investigated, specifically, by density functional theory (DFT) and the cluster expansion method, with a focus on composition variations and their effect on the properties. The results reveal that Ti0.5W0.5C exhibits higher thermodynamic stability, whereas intermediate compositions, such as Ti0.67W0.33C achieve peak hardness (~33 GPa) due to the synergistic effect of Ti–C covalent and W–C metallic bonds. Electronic structure analysis reveals that the bonds have a hybridized nature, which impart the material with mechanical resilience and thermal stability. The introduction of tungsten exerts a pronounced influence on elastic and vibrational properties, enhances the bulk modulus, and enables the tailored tuning of material properties. These findings provide an important scientific foundation for the design of high-performance materials for application in metal cutting, wear-resistant coatings, and structural components.","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"48 4","pages":"266 - 279"},"PeriodicalIF":1.2,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148909723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Formation of a Gradient TiСN–(Co, Ti, W)С, N Structure on the Surface of a Specimen Made of the WC–5TiC–10Co Hard Alloy under Vacuum in Contact with TiN Nanopowder 真空条件下WC-5TiC-10Co硬质合金试样与TiN纳米粉末接触表面形成TiСN - （Co, Ti， W）С， N梯度结构

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2026-06-18 DOI: 10.3103/S1063457626030093

M. M. Prokopiv, O. V. Kharchenko, S. P. Starik, H. P. Zakharchuk

{"title":"Formation of a Gradient TiСN–(Co, Ti, W)С, N Structure on the Surface of a Specimen Made of the WC–5TiC–10Co Hard Alloy under Vacuum in Contact with TiN Nanopowder","authors":"M. M. Prokopiv, O. V. Kharchenko, S. P. Starik, H. P. Zakharchuk","doi":"10.3103/S1063457626030093","DOIUrl":"10.3103/S1063457626030093","url":null,"abstract":"The surface of a specimen made of WC–5TiC–10Co alloy T5K10 with a gradient WC–13Co surface layer was investigated to demonstrated that additional sintering under a pressure of 50–60 Pa in a nitrogen atmosphere at 1400°C for 20 min in contact with a pre-applied TiN nanopowder slurry results in a dark outer layer (DOL) of 0.2–3.0 mm in size with a dense heterophase structure containing a Co–W–Ti matrix doped with N and C and dispersed ceramic TiNC grains of various morphology. The mechanism of the formation of this gradient structure was identified as the infiltration of some Co–W–C melt solution generated under thermokinetic sintering conditions from the WC–13Co layer (reduced to 7%) into the porous TiN nanopowder layer. This is followed by liquid-phase sintering accompanied by the partial substitution of nitrogen in TiN with carbon, Co and W dissolution, porosity elimination, and the development of a heterophase structure. Microhardness measurements revealed the values of 14.5 GPa for the WC–7Co layer and 16.1 GPa for the newly formed DOL. The resulting gradient structure shows strong potential for applications in cutting tools for the machining of high-alloy steels.","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"48 3","pages":"177 - 184"},"PeriodicalIF":1.2,"publicationDate":"2026-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148268714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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