Journal of Superhard Materials最新文献_第2页

Construction of Diamond/Graphene Composite Structure via a Low-Temperature Heat Treatment 通过低温热处理构建金刚石/石墨烯复合结构

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-09-06 DOI: 10.3103/S1063457624040051

Danhui Han, Junlong Liu, Chong Peng, Baoyan Liang

引用次数: 0

On Melting of Boron Arsenide under Pressure 论砷化硼在压力下的熔化

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-09-06 DOI: 10.3103/S1063457624040105

Vladimir L. Solozhenko

引用次数: 0

Effect of Sintering Pressure on the Properties of PcBN Carbide Inserts 烧结压力对碳化 PCBN 刀片性能的影响

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-09-06 DOI: 10.3103/S1063457624040129

Xiangxiang Yin, Peicheng Mo

引用次数: 0

Effect of wSiC and wSi3N4 Whiskers on the Ultimate Dynamic Tensile Strength of cBN Composites from the BL Group wSiC 和 wSi3N4 晶须对 BL 组 cBN 复合材料极限动态拉伸强度的影响

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-09-06 DOI: 10.3103/S1063457624040117

D. A. Stratiichuk, L. M. Devin, S. V. Richev, V. Z. Turkevich, Y. Y. Rumiantseva

引用次数: 0

Quantum Mechanism of Optical Glass Polishing 光学玻璃抛光的量子机制

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-09-06 DOI: 10.3103/S106345762404004X

Yu. D. Filatov

{"title":"Quantum Mechanism of Optical Glass Polishing","authors":"Yu. D. Filatov","doi":"10.3103/S106345762404004X","DOIUrl":"10.3103/S106345762404004X","url":null,"abstract":"As a result of studying the mechanism of optical glass polishing by means of disperse systems from ceria powders, it has been established that glass is eliminated via the removal of sludge nanoparticles from the treated surface during its interaction with polishing powder particles, which occurs in an open microresonator formed by the surfaces of the treated material and polishing powder particles due to Förster resonant energy transfer between the energy levels of polishing powder and treated material particles. It has been shown that, in a bimodal system with a discrete spectrum of natural frequencies, the number of sludge nanoparticles generated in the treated surface–disperse system–lap surface grows with an increase in the bulk wear coefficient, the lifetime of the excited state of treated surface clusters, and the microresonator Q factor. A method of calculating the treated material removal rate and the roughness parameters of polished surfaces has been developed to establish that the deviation of the calculated polishing rate from experimental data is less than 2%, and the errors of calculating the arithmetic mean Ra and mean square Rq deviations of the polished surface profile attain 10%, and the calculated maximum profile height Rmax is 40–50% underestimated as compared to experimental data.","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"46 4","pages":"303 - 313"},"PeriodicalIF":1.2,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186323","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 Indicators of Grinding Tools with Cubic Boron Nitride Grains with Combined Wear-Resistant Coatings 立方氮化硼晶粒与复合耐磨涂层磨削工具的性能指标

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-09-06 DOI: 10.3103/S1063457624040087

V. I. Lavrinenko, V. G. Poltoratskyi, O. O. Pasichnyi, V. Yu. Solod

引用次数: 0

Synthetic HPHT Diamonds as Diamond-Bearing Rock Pseudoindicators 作为含钻岩石伪指标的合成 HPHT 钻石

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-09-06 DOI: 10.3103/S1063457624040075

V. M. Kvasnytsya

引用次数: 0

Investigating the Wear Resistance of Cdiamond–(WC–Co)–ZrO2 Composite Impregnated Crowns in Granite Drilling 研究花岗岩钻孔中 Cdiamond-(WC-Co)-ZrO2 复合材料浸渍冠的耐磨性

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-09-06 DOI: 10.3103/S1063457624040099

B. T. Ratov, V. A. Mechnik, E. S. Gevorkyan, N. A. Bondarenko, V. M. Kolodnitskyi, N. S. Akhmetova, D. L. Korostyshevskyi, R. U. Bayamirova

{"title":"Investigating the Wear Resistance of Cdiamond–(WC–Co)–ZrO2 Composite Impregnated Crowns in Granite Drilling","authors":"B. T. Ratov, V. A. Mechnik, E. S. Gevorkyan, N. A. Bondarenko, V. M. Kolodnitskyi, N. S. Akhmetova, D. L. Korostyshevskyi, R. U. Bayamirova","doi":"10.3103/S1063457624040099","DOIUrl":"10.3103/S1063457624040099","url":null,"abstract":"The study investigated the wear rate dependences of diamond-impregnated drill bits consisting of composite diamond-containing materials (CDMs): specifically, 25Cdiamond–70.5WC–4.5Co and 25Cdiamond–68.62WC–4.38Co‒2ZrO2. These materials were fabricated via spark plasma sintering at temperatures ranging from 20 to 1350°C under a pressure of 30 MPa for 3 min. Testing was conducted under rotational speeds and axial load conditions typical for granite drilling. It was demonstrated that incorporating 2 wt % of ZrO2 nanopowder into the composition of 25Cdiamond–70.5WC–4.5Co resulted in a threefold reduction in wear rate. The highest wear resistance of these diamond-impregnated drill bits was observed at rotational speeds of 250 rpm and axial loads of 900 kg, as well as at 750 rpm and 1250 kg axial load. Comparatively, the enhanced wear resistance of diamond-impregnated drill bits made from 25Cdiamond–68.62WC–4.38Co‒2ZrO2, in contrast to those made from 25Cdiamond–70.5WC–4.5Co, can be attributed to factors such as finer grain size, higher relative density, improved strength under compression and bending, increased fracture toughness, and the formation of strong bonding between diamond grains and the hard-alloy matrix. These findings, combined with the fine-grained structure of the hard-alloy matrix and high diamond retention, indicate that these diamond-impregnated drill bits have potential for application in developing new tools with superior operational properties for drilling hard rock formations.","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"46 4","pages":"314 - 321"},"PeriodicalIF":1.2,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224329","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

Theoretical Estimates for the Packing Density of Binary Powder Systems: Review and Comparative Analysis 二元粉末体系堆积密度的理论估算：回顾与比较分析

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-09-06 DOI: 10.3103/S1063457624040063

V. I. Kushch, V. G. Kulych

引用次数: 0

Activation Energy of Electrical Conductivity and Characteristics of Microwave Radiation Absorption in AlN–SiC Composite AlN-SiC 复合材料的电导活化能和微波辐射吸收特性

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-09-06 DOI: 10.3103/S1063457624040026

V. I. Chasnyk, D. V. Chasnyk, O. M. Kaidash

{"title":"Activation Energy of Electrical Conductivity and Characteristics of Microwave Radiation Absorption in AlN–SiC Composite","authors":"V. I. Chasnyk, D. V. Chasnyk, O. M. Kaidash","doi":"10.3103/S1063457624040026","DOIUrl":"10.3103/S1063457624040026","url":null,"abstract":"We investigated semiconductor composite materials of the AlN–50% SiC–Y3Al5O12 system, obtained by free sintering, which exhibit a high level of microwave absorption of 4.6 dB/mm. The activation energy values of electrical conductivity (Ea) for the obtained composites were calculated within the temperature range of 20–800°C. At temperatures close to room temperature (20–150 °C), Ea ranges from 0.120 to 0.075 eV and increases to 0.270–0.275 eV as the temperature rises to 350–800°C. The determined photon energy values of the electromagnetic wave, in the frequency range from 1 to 100 GHz, are from 4.13 × 10–6 to 4.13 × 10–4 eV. Using quantum electrodynamics at the atomic level, we described the process of microwave radiation absorption in the AlN–SiC semiconductor composites. Low-energy photons of electromagnetic waves incident on the surface of the AlN–SiC composite transfer their energy to the conduction electrons in the near-surface layers of the SiC phase and are absorbed by them. The conduction electrons emit photons at the same frequency of the electromagnetic wave, predominantly into the same SiC grains, within 10–8 s. This interaction results in the absorption of electromagnetic radiation, leading to the dissipation of wave energy and subsequent heating of the entire composite: initially, the SiC phase particles and, subsequently, the AlN grains.","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"46 4","pages":"285 - 292"},"PeriodicalIF":1.2,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224327","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