Journal of Superhard Materials最新文献_第7页

Effect of Isotopic Composition, Crystal Size, Intergranular Boundary Thermal Resistance, and Temperature on the Thermal Conductivity of Diamond Nanopolycrystals and Nanocomposites 同位素组成、晶粒尺寸、晶间边界热阻和温度对金刚石纳米多晶和纳米复合材料导热性能的影响

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2025-09-04 DOI: 10.3103/S1063457625040057

V. І. Kushch, O. P. Podoba, S. V. Shmegera, O. O. Bochecka

{"title":"Effect of Isotopic Composition, Crystal Size, Intergranular Boundary Thermal Resistance, and Temperature on the Thermal Conductivity of Diamond Nanopolycrystals and Nanocomposites","authors":"V. І. Kushch, O. P. Podoba, S. V. Shmegera, O. O. Bochecka","doi":"10.3103/S1063457625040057","DOIUrl":"10.3103/S1063457625040057","url":null,"abstract":"This study presents a review and comparative analysis of existing approaches, methodologies, and findings related to the thermal conductivity of nanostructured solids. The authors developed theoretical models to predict the effective thermal conductivity of nanopolycrystals and nanocomposites with imperfect grain boundaries, incorporating the effects of isotopic composition, crystal size, interfacial thermal resistance, and temperature. These models rely on the current understanding of the physical mechanisms of lattice heat transfer in covalent crystals and phonon scattering at structural defects. The developed theory offers a straightforward method for estimating the thermal conductivity of nanocomposites and provides insight into the dominant factors governing heat transfer in crystalline structures at the nanoscale. Comparison with experimental data confirms the model’s validity and its applicability to the prediction of thermal conductivity in real-world nanopolycrystalline and nanocomposite materials, including those containing diamond.","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"47 4","pages":"249 - 260"},"PeriodicalIF":1.2,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144990592","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

Polishing Techniques for Optical Components of Glass, Semiconductors, and Copper 玻璃、半导体和铜光学元件的抛光技术

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2025-09-04 DOI: 10.3103/S1063457625040033

Yu. D. Filatov, T. O. Prikhna, A. Yu. Boyarintsev, V. I. Sidorko, S. V. Kovalev, I. A. Rybalka

{"title":"Polishing Techniques for Optical Components of Glass, Semiconductors, and Copper","authors":"Yu. D. Filatov, T. O. Prikhna, A. Yu. Boyarintsev, V. I. Sidorko, S. V. Kovalev, I. A. Rybalka","doi":"10.3103/S1063457625040033","DOIUrl":"10.3103/S1063457625040033","url":null,"abstract":"The study of the mechanisms governing material removal and nanoprofile formation on polished surfaces during the polishing of optical components made of glass, semiconductors, and copper using dispersed systems composed of micro- and nanopowders reveals that the generation of slurry nanoparticles, resulting from energy transfer from abrasive particles to the processed surface, proceeds via the Förster resonance energy transfer (FRET) mechanism in the case of glass, or quantum dot-mediated FRET (QD-FRET) in the case of semiconductors and copper. Quantum dots form on these surfaces during polishing. The material removal rate decreases with increasing bonding energy in glass or with the effective bandgap width of semiconductor or copper oxide quantum dots that form on the surface. The relationship between the energy of slurry nanoparticles and their most probable size follows a linear function for K8 glass and polymethyl methacrylate (PMMA), and a parabolic function for germanium, indium antimonide, and copper. The material removal rate during the polishing of optical components made of K8 glass, PMMA, germanium, indium antimonide, and copper increases linearly with the quality factor of the microresonator and the excited-state lifetime of clusters or quantum dots on the treated surface, in accordance with general polishing trends. Surface roughness parameters Ra, Rq, Rmax, and Rz, together with the material removal rate, serve as effective criteria for evaluating polishing efficiency. Theoretical predictions of the material removal rate demonstrate good agreement with experimental measurements of polishing performance for glass, semiconductor crystals, and copper, with deviations ranging from 2 to 5%.","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"47 4","pages":"300 - 310"},"PeriodicalIF":1.2,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144990593","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

Computer Simulation of the Effect of High-Speed Pressure Sintering Parameters on the Densification and Grain Growth of Boron Carbide-Based Material 高速加压烧结参数对碳化硼基材料致密化和晶粒生长影响的计算机模拟

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2025-09-04 DOI: 10.3103/S1063457625040021

V. A. Dutka, A. L. Maystrenko, V. M. Kolodnitskyi

{"title":"Computer Simulation of the Effect of High-Speed Pressure Sintering Parameters on the Densification and Grain Growth of Boron Carbide-Based Material","authors":"V. A. Dutka, A. L. Maystrenko, V. M. Kolodnitskyi","doi":"10.3103/S1063457625040021","DOIUrl":"10.3103/S1063457625040021","url":null,"abstract":"This study presents a computational investigation into the effects of high-temperature dwell time, sintering temperature, and applied pressure on the densification kinetics and grain growth of micrometer-scale boron carbide–based powder mixtures during high-speed pressure-assisted sintering (HSPAS) at pressures ranging from 250 to 1200 MPa. The simulations employed numerical models of electric heating and densification. The densification model relies on the Skorokhod–Olevsky–Stern theory of sintering for porous materials and incorporates grain growth kinetics throughout the sintering process. The results demonstrate that by adjusting the sintering temperature, dwell time, and pressure during HSPAS, one can control the densification behavior and grain evolution. Specifically, appropriate parameter selection shortens the time required for complete densification, significantly suppresses grain growth, and yields a dense microstructure in the sintered sample. At lower-temperature HSPAS conditions, increasing pressure from 250 to 1200 MPa markedly enhances the densification rate and reduces the time for full densification by a factor of 2 to 3. Notably, by optimizing the heating rate and pressure during HSPAS, the densification time can be reduced by two to three times compared to spark plasma sintering under pressures up to 100 MPa, while simultaneously preventing grain growth.","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"47 4","pages":"270 - 280"},"PeriodicalIF":1.2,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144990587","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

Body Center Tetragonal Pseudo-Diamond C20: Crystal Chemistry and First Principles Investigations of Physical Properties 体心四边形伪金刚石C20：晶体化学和物理性质的第一性原理研究

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2025-09-04 DOI: 10.3103/S1063457625040070

Samir F. Matar

引用次数: 0

Automated Identification of the 3D-Shape of Grains for High-Strength Grinding Powders of Synthetic Diamond 合成金刚石高强度磨粉颗粒三维形状的自动识别

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2025-07-20 DOI: 10.3103/S1063457625030086

G. A. Petasyuk, O. O. Bochechka

{"title":"Automated Identification of the 3D-Shape of Grains for High-Strength Grinding Powders of Synthetic Diamond","authors":"G. A. Petasyuk, O. O. Bochechka","doi":"10.3103/S1063457625030086","DOIUrl":"10.3103/S1063457625030086","url":null,"abstract":"Particular significance in the problems of the indirect analytical estimation of technological properties for grinding powders from synthetic diamond is substantiated for the spatial shape of grains. Referring to literature sources, it is pointed out that the actual 3D grain shape of such grinding powders, being used immediately instead of their 3D model, provides more reliable information about the values of technological properties. The creation of methodical tools for the automated 3D shape identification of a large-volume sample (up to 2000 grains) from such abrasive powders is emphasized to be of applied importance. An original method of solving such a problem for high-strength abrasive powders of synthetic diamond is proposed. The method is based on the known fact that grains of such powders are crystals with a 3D shape close to octahedra, cubooctahedra, and truncated octahedra. Some analytical and graphic information about the shape of an orthographic parallel projection of these spatial bodies is given depending on the 2D shape of the face, on which they are located. An analytical relationship between the geometric projection parameters required for the automatic identification of both the 2D shape of this projection and the 3D shape of grains and the generative parameters of an octahedron, cubooctahedron, and a truncated octahedron is derived. Some analogues to the morphometric characteristics of abrasive powders diagnosed by contemporary computer and technical tools with grains identical to the considered spatial bodies by their 3D shape are updated. The practical application of the developed methodical tools is illustrated by using high-strength abrasive powders AS250–AS500 from synthetic diamond as an example. It has been established that the relative content of grains shaped other than octahedra, cubooctahedra, and truncated octahedra is less than 31%.","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"47 3","pages":"234 - 245"},"PeriodicalIF":1.2,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144326","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

Impact of Nanomontmorillonite on the Properties of Vitrified Bonded Diamond Grinding Wheels 纳米蒙脱土对玻璃化结合剂金刚石砂轮性能的影响

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2025-07-20 DOI: 10.3103/S1063457625030098

Jinyu Shang, Ruien Yu, Boheng Zhu, Wenjie Gong, Zhicong Tian, Kenan Li, Qingchun Ma, Xijing Zhu

引用次数: 0

Structure and Surface Area of Aluminum Nitride Particles under Milling 铣削作用下氮化铝颗粒的结构和表面积

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2025-07-20 DOI: 10.3103/S1063457625030074

V. I. Omelianenko, I. P. Fesenko, O. M. Kaidash, Yu. M. Tuz, A. V. Dovhal, S. A. Kukharenko, V. I. Chasnyk, G. S. Oleǐnik, H. P. Zakharchuk

引用次数: 0

Recent Advances in Diamond-Abrasive Machining of Hard and Brittle Materials (Review) 硬脆材料金刚石磨料加工研究进展（综述）

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2025-07-20 DOI: 10.3103/S1063457625030049

V. I. Lavrinenko

{"title":"Recent Advances in Diamond-Abrasive Machining of Hard and Brittle Materials (Review)","authors":"V. I. Lavrinenko","doi":"10.3103/S1063457625030049","DOIUrl":"10.3103/S1063457625030049","url":null,"abstract":"This article examines state-of-the-art research on diamond-abrasive machining of hard and brittle materials, with a focus on reproducing machining conditions at microscopic scales using high-resolution instruments. The discussion emphasizes the increasing utilization of porous, rough-surfaced, and nanotwinned (nt-D) diamonds. A new type of diamond with a rough surface, synthesized via thermochemical corrosion, exhibits a larger surface area and greater electronegativity than conventional diamond. These characteristics enhance interfacial adhesion between the binder and the diamond. Molecular dynamics simulations demonstrate their effectiveness in analyzing the mechanisms of abrasive processes such as nanocutting, grinding, and polishing. The findings identify critical grinding depth, vibration amplitude, and cutting speed as key machining parameters that determine the transition of diamond-abrasive machining of hard and brittle materials into a plastic regime. Recent publications recognize chemical–mechanical polishing as an efficient method for processing materials such as silicon carbide, monocrystalline silicon, nanotwinned diamond, and boron-doped diamonds [1].","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"47 3","pages":"214 - 221"},"PeriodicalIF":1.2,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144375","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

Thermal Conductivity of WC–20% Co and WC–20% Ni Alloys with Mesostructure WC-20% Co和WC-20% Ni细观结构合金的导热性能

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2025-07-20 DOI: 10.3103/S1063457625030062

O. O. Matviichuk, V. Z. Turkevych, Ye. F. Kuz’menko, I. O. Hnatenko

引用次数: 0

Effect of Grain Boundaries on the Elasticity and Thermal Conductivity of Polycrystalline Cubic Boron Nitride 晶界对多晶立方氮化硼弹性和导热性的影响

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2025-07-20 DOI: 10.3103/S1063457625030037

V. I. Kushch, I. A. Petrusha, V. Z. Turkevych

引用次数: 0