Journal of Superhard Materials最新文献

Melting Temperatures of (Super)Hard Cubic Boron Pnictides 超）硬立方氮化硼的熔化温度

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-10-27 DOI: 10.3103/S1063457624050095

V. L. Solozhenko

引用次数: 0

Electrodynamic Properties of AlN–C and AlN–C–Mo Composites Produced by Pressureless Sintering 无压烧结法制备的 AlN-C 和 AlN-C-Mo 复合材料的电动特性

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-10-27 DOI: 10.3103/S1063457624050083

T. B. Serbeniuk, T. O. Prikhna, V. V. Zagorodnii, V. B. Sverdun, V. V. Oliynyk, M. V. Karpets, V. E. Moshchil, S. S. Ponomaryov

引用次数: 0

Modeling the Densification of Boron Carbide Based Ceramic Materials under Flash Pressure Sintering 碳化硼基陶瓷材料在闪压烧结下的致密化建模

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-10-27 DOI: 10.3103/S1063457624050022

V. A. Dutka, A. L. Maystrenko, V. G. Kulych, O. I. Borymskyi

引用次数: 0

Original Orthorhombic Tetrahedral-Trigonal Hybrid Allotropes Cn (n = 8, 10, 12, 14) with Ethene–Like and Propadiene–Like Units: Crystal Engineering and Quantum Mechanical Calculations 具有类乙烯和类丙二烯单元的原始正四面体-三方混合异构体 Cn（n = 8、10、12、14）：晶体工程和量子力学计算

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-10-27 DOI: 10.3103/S106345762405006X

Samir F. Matar

{"title":"Original Orthorhombic Tetrahedral-Trigonal Hybrid Allotropes Cn (n = 8, 10, 12, 14) with Ethene–Like and Propadiene–Like Units: Crystal Engineering and Quantum Mechanical Calculations","authors":"Samir F. Matar","doi":"10.3103/S106345762405006X","DOIUrl":"10.3103/S106345762405006X","url":null,"abstract":"Original carbon allotropes, orthorhombic C8, C10, C12 and C14 presenting mixed sp2/sp3 carbon hybridizations with C=C ethene-like and C=C=C propadiene-like embedded units are proposed from crystal engineering and calculations within the framework of the quantum density functional theory DFT. The carbon allotropes with topologies related with jeb, mog, as well as new topologies, show alternating tetrahedral and trigonal carbon stackings along the a-orthorhombic direction (vertical) close to but different from “isoglitter”. The carbon allotropes (C8, C10, C12, C14) were shown to be cohesive and stable both mechanically (elastic properties) and dynamically (phonons), with calculated Vickers hardness (HV) magnitudes ranging between 25 and 52 GPa, the latter magnitude assigned to C12 possessing the largest number of tetrahedral versus trigonal stackings. High phonon frequencies ω ∼ 50 THz were attributed to stretching mode of C=C (in C8 and C12) and C=C=C (in C10 and C14) units with good agreement with experiment for Raman molecular identifications. Observed magnitudes of ω ∼ 40 THz were proposed as signatures of C–C simple bonds in the tetrahedra as in diamond. The electronic band structure and electronic density of states DOS shown exemplarily for C8 point to metallic-like behavior assigned mainly to the itinerant role of trigonal carbon π-electrons.","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"46 5","pages":"333 - 343"},"PeriodicalIF":1.2,"publicationDate":"2024-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518826","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

Technological and Innovative Features of the Electroconsolidation Method as a Kind of Plasma Sintering for Refractory Compounds 作为一种难熔化合物等离子烧结法的电固结法的技术和创新特点

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-10-27 DOI: 10.3103/S1063457624050046

E. S. Hevorkian, V. P. Nerubatskyi, V. O. Chyshkala, S. V. Lytovchenko, M. M. Prokopiv, W. Samociuk, V. A. Mechnik

引用次数: 0

Effect of Sintering Parameters and Liquid Phase Content on the Properties of Fe-Rich Based Impregnated Diamond Bit Matrix 烧结参数和液相含量对富铁基浸渍金刚石钻头基体性能的影响

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-10-27 DOI: 10.3103/S1063457624050101

Zhiming Wang, Xiecai Yan, Yakun Tao, Wucheng Sun, Xiaohong Fang, Longchen Duan, Songcheng Tan

{"title":"Effect of Sintering Parameters and Liquid Phase Content on the Properties of Fe-Rich Based Impregnated Diamond Bit Matrix","authors":"Zhiming Wang, Xiecai Yan, Yakun Tao, Wucheng Sun, Xiaohong Fang, Longchen Duan, Songcheng Tan","doi":"10.3103/S1063457624050101","DOIUrl":"10.3103/S1063457624050101","url":null,"abstract":"The effects of sintering parameters and liquid phase content on the properties of Fe-rich based pre-alloyed impregnated diamond bit (IDB) matrix were investigated using orthogonal experimental design. Based on the analysis of the results, it was found that sintering temperature and liquid phase content have significant effects on the bending strength, hardness, relative density, and wear rate of the matrix. For metal matrix composite (MMC), as the sintering temperature increased from 900 to 1050°C, the bending strength, hardness (HRB), and relative density of the MMC decreased first, then increased, and finally decreased again, while the wear rate increased with temperature. With increasing liquid phase content, the four properties of the MMC showed a similar trend of increasing first and then decreasing. Comparatively, the effects of holding time and sintering pressure on the properties of the matrices were smaller than those of sintering temperature and liquid phase content, but they also had significant effects on some properties of the matrices. Holding time had a more significant effect on hardness and wear resistance, while sintering pressure only had a significant effect on hardness. After adding diamonds, the bending strength of diamond matrix composite increased first and then decreased with increasing temperature, while the bending strength continued to decrease with the increase of liquid phase content. This study provides a feasible method for studying the effects of various sintering parameters and liquid phase content on the properties of Fe-rich pre-alloyed IDB matrix, which is helpful for optimizing the preparation process of drill bits.","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"46 5","pages":"376 - 389"},"PeriodicalIF":1.2,"publicationDate":"2024-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518827","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

Boron Oxide on the Surface of Grains from Superhard Materials as a Possible Factor Increasing the Performance Characteristics of Grinding Tools 超硬材料晶粒表面的氧化硼是提高磨削工具性能特性的一个可能因素

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-10-27 DOI: 10.3103/S1063457624050058

V. I. Lavrinenko

引用次数: 0

Thermal Conductivity of Cutting Tool Ceramics Fabricated from Exothermal Mixtures of Cr2O3–AlN and ZrO2(M)–Al–C via Hot Pressing 用 Cr2O3-AlN 和 ZrO2(M)-Al-C 的放热混合物通过热压制造切削工具陶瓷的导热率

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-10-27 DOI: 10.3103/S1063457624050071

M. M. Prokopiv, O. V. Kharchenko, I. P. Fesenko

引用次数: 0

Mechanism of Polishing for Polystyrene Based Scintillators 聚苯乙烯基闪烁体的抛光机理

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-10-27 DOI: 10.3103/S1063457624050034

Yu. D. Filatov, A. Y. Boyarintsev, V. I. Sidorko, S. V. Kovalev, O. V. Kolesnikov, V. O. Novgorodtsev, Ya. I. Polupan

{"title":"Mechanism of Polishing for Polystyrene Based Scintillators","authors":"Yu. D. Filatov, A. Y. Boyarintsev, V. I. Sidorko, S. V. Kovalev, O. V. Kolesnikov, V. O. Novgorodtsev, Ya. I. Polupan","doi":"10.3103/S1063457624050034","DOIUrl":"10.3103/S1063457624050034","url":null,"abstract":"Abstract—As a result of studying the mechanism of polishing with a disperse system from micro- and nanopowders for polystyrene scintillators, sludge nanoparticles (SP) and polishing powder wear particles (PP) were established to form due to Förster resonance energy transfer (FRET) occurring in a four-mode regime in the open microresonator formed by the surfaces of a treated material and a polishing powder particle. The disperse phase particles in the polishing disperse system were demonstrated to wear twice faster as compared to treated material removal. The total cross section of SPs scattering on PPs (31.1 Mb) during the scattering of quantum nanoparticles in the open resonator formed by the treated material and lap surfaces was shown to be much larger than the total cross section of PPs scattering on SPs to result in the absence of a deposit from polishing powder wear nanoparticles on the treated surface and the presence of a deposit from sludge nanoparticles on the lap surface. The results of calculating the material removal rate were established to agree with the data of experimental polystyrene polishing rate measurements at a deviation up to 4%, and SP deposit fragments on the lap surface were from 0.2 to 1.0 mm in size and discretely arranged within an annular zone with a radius of 24.5 mm. The polishing of polystyrene based scintillation elements with a disperse system from micro- and nanoparticles was shown to improve the pulse shape discrimination of fast neutrons and gamma quanta by high aspect ratio detectors by 14%.","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"46 5","pages":"390 - 401"},"PeriodicalIF":1.2,"publicationDate":"2024-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518828","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

Effect of Steel Millings on the Structure and Mechanical Properties of SiC–Al2O3 Composites 钢粉对 SiC-Al2O3 复合材料结构和力学性能的影响

IF 1.2 4区材料科学

Journal of Superhard Materials Pub Date : 2024-09-06 DOI: 10.3103/S1063457624040038

A. H. Dovhal, L. B. Pryimak, V. V. Varijukhno, O. M. Biliakovych

引用次数: 0