Наукова електронна бібліотека
періодичних видань НАН України

Перегляд Сверхтвердые материалы за назвою

Репозиторій DSpace/Manakin

Перегляд Сверхтвердые материалы за назвою

Сортувати за: Порядок: Результатів:

  • Boron: a hunt for superhard polymorphs 
    Oganov, A.R.; Solozhenko, V.L. (Сверхтвердые материалы, 2009)
    Boron is a unique element, being the only element, all known polymorphs1 of which are superhard, and all of its crystal structures are distinct from any other element. The electron-deficient bonding in boron explains its ...
  • Characterization of Ti–B–C–N films deposited by dc magnetron sputtering of bicomponent Ti/B₄C target 
    Onoprienko, A.A.; Ivashchenko, V.I.; Timofeeva, I.I.; Sinelnitchenko, А.К.; Butenko, О.А. (Сверхтвердые материалы, 2015)
    Quaternary Ti–B–C–N films have been deposited onto Si (100) substrates by dc magnetron sputtering of bi-component Ti/B₄C target in an Ar/N₂ gas mixture with different amounts of nitrogen in the mixture (from 0 to 50%). The ...
  • Characterization of tool wear when machining Alloy 718 with high pressure cooling using conventional and surface-modified WC–Co tools 
    Hoier, P.; Klement, U.; Tamil Alagan, N.; Beno, T.; Wretland, A. (Сверхтвердые материалы, 2017)
    Coolant supplied by high pressure into the cutting zone has shown the lower thermal loads on the tool when machining difficult-to-cut materials as the Alloy 718. In this study, we investigate how the combination of ...
  • Chemical synthesis of niobium diboride nanosheets by a solid-state reaction route 
    Wang Liangbiao; Shen Qianli; Qin Hengfei; Zhao Dejian; Liu Weiqiao; Sun Jianhua; Zhu Binglong; Zhou Quanfa (Сверхтвердые материалы, 2018)
    A new process was developed to synthesize niobium diboride (NbB₂) nanosheets with the dimension of about 500 nm and thickness of about 10 nm by using metal niobium, iodine and sodium borohydride as starting materials in ...
  • Comparative investigation of NbN and Nb–Si–N films: experiment and theory 
    Ivashchenko, V.I.; Scrynskyy, P.L.; Lytvyn, O.S.; Butenko, O.O.; Sinelnichenko, O.K.; Gorb, L.; Hill, F.; Leszczynski, J.; Kozak, A.O. (Сверхтвердые материалы, 2014)
    NbN and Nb–Si–N films have been deposited by magnetron sputtering of the Nb and Si targets on silicon wafers at various powers supplied to the Nb target. The films have been investigated by an atomic force microscope, X-ray ...
  • Composites of the cBN–Si₃N₄ system reinforced by SiCw for turning tools 
    Osipov, A.S.; Klimczyk, P.; Cygan, S.; Melniichuk, Iu.A.; Petrusha, I.A.; Jaworska, L. (Сверхтвердые материалы, 2016)
    The cBN–Si₃N₄–SiCw composites with different SiCw contents up to 20 vol % have been produced at high pressure of 8.0 GPa and high temperature of 2500 K. It has been defined that the Young modulus of the composites were ...
  • Correlation between edge radius of the cBN cutting tool and surface quality in hard turning 
    Zhao, T.; Agmell, M.; Persson, J.; Bushlya, V.; Ståhl, J.E.; Zhou, J.M. (Сверхтвердые материалы, 2017)
    In this study, the attempt has been made to investigate the correlation between the cutting tool edge radius and surface quality in terms of the surface roughness and subsurface deformation through a FE simulation and ...
  • Covalent-bonded graphyne polymers with high hardness 
    Hu, M.; He, J.; Wang, Q.; Huang, Q.; Yu, D.; Tian, Y.; Xu, B. (Сверхтвердые материалы, 2014)
    Eight covalent-bonded graphyne polymers have been proposed using the newly developed USPEX and CALYPSO methods based on the first principle calculations. These polymers are energetically more favorable than the corresponding ...
  • Crystal structure of dense pseudo-cubic boron allotrope, pc-B₅₂, by powder X-ray diffraction 
    Kurakevych, O.O.; Solozhenko, V.L. (Сверхтвердые материалы, 2013)
    During past years, a number of reports have been published on synthesis of tetragonal allotrope of boron, t-B₅₂ phase. However, no unambiguous characterization of the crystal structure has been performed to the present ...
  • Crystal structures, elastic properties, and hardness of high-pressure synthesized CrB₂ and CrB₄ 
    Wang, S.; Yu, X.; Zhang, J.; Zhang, Y.; Wang, L.; Leinenweber, K.; Xu, H.; Popov, D.; Park, Ch.; Yang, W.; He, D.; Zhao, Y. (Сверхтвердые материалы, 2014)
    Chromium tetraboride (CrB₄), a recently proposed candidate for superhard materials, has been synthesized at high pressure and temperature by a solid-state reaction. As a byproduct, chromium diboride (CrB₂) also forms and ...
  • Deposition and characterization of thin Si–B–C–N films by dc reactive magnetron sputtering of composed Si/B₄C target 
    Onoprienko, A.A.; Ivashchenko, V.I.; Kozak, A.O.; Sinelnichenko, A.K.; Tomila, T.V. (Сверхтвердые материалы, 2019)
    The effect of the gas mixture composition on the structure, chemical bond character and hardness of Si–B–C–N films was systematically studied. A series of Si–B–C–N films was deposited by reactive dc magnetron sputtering ...
  • Design of hard surfaces with metal (Hf/V) nitride multinanolayers 
    Escobar, C.; Caicedo, J.C.; Caicedo, H.H.; Mozafari, M. (Сверхтвердые материалы, 2014)
    Physical properties as mechanical and tribological evolution on 4140 steel surfaces coated with hafnium nitride/vanadium nitride [HfN/VN]n multinanolayered systems deposited in various bilayer periods via magnetron sputtering ...
  • Developments in synthesis, characterization, and application of large, high-quality CVD single crystal diamond 
    Liang, Q.; Meng, Y.-F.; Yan, C.-S.; Krasnicki, S.; Lai, J.; Hemawan, K.; Shu, H.; Popov, D.; Yu, T.; Yang, W.; Mao, H.K.; Hemley, R.J. (Сверхтвердые материалы, 2013)
    Single crystal diamond synthesis by microwave plasma chemical vapor deposition at rapid growth rate has considerably advanced in the past few years. Developments have been made in growth, optical quality, and mechanical ...
  • Doping Fe-based diamond tool matrix composites with a rare-earth element 
    Zou, Q.; Gong, W.; Zeng, X.; Wu, Y.; Liu, J.; Zou, Sh. (Сверхтвердые материалы, 2009)
    The paper presents the experiments on adding rare-earth element cerium to diamond matrix composites. Based on the doping of rare earth in metal powders including tungsten carbide, a small amount of nickel, iron entirely ...
  • Effect of different binder phases on the Σ2 grain boundary plane distribution in cemented carbides 
    Xiaokun Yuan (Сверхтвердые материалы, 2019)
    For WC–6 wt % Co and WC–6 wt % Ni composites, and by using five parameter analysis method as a new approach, the geometric and crystallographic features of carbide/carbide boundaries have been characterized. Two most ...
  • Effect of graphite addition on impregnated diamond bit properties 
    Lanlan Xie; Liyi Chen; Xiaolin Huang (Сверхтвердые материалы, 2019)
    Graphite was used as a solid lubricant to reduce thermal damage in diamond bit when drilling without coolant. Graphite was added to the bit matrix material to reduce friction coefficient and heat. The influence of content, ...
  • Effect of nanostructuration on compressibility of cubic BN 
    Le Godec, Y.; Kurakevych, O.O.; Munsch, P.; Garbarino, G.; Mezouar, M.; Solozhenko, V.L. (Сверхтвердые материалы, 2012)
    Compressibility of high-purity nanostructured cBN has been studied under quasi-hydrostatic conditions at 300 K up to 35 GPa using diamond anvil cell and angle-dispersive synchrotron powder X-ray diffraction. It has been ...
  • Effects of sintering temperature and addition of Fe and B₄C on hardness and wear resistance of diamond reinforced metal matrix composites 
    Şimşir, M.; Öksüz, K.E. (Сверхтвердые материалы, 2013)
    The effects of sintering temperature and addition of Fe instead of Co into the matrix composition on the mechanical properties of diamond-reinforced MMC’s have been studied. Diamond-reinforced MMC’s based on Fe–Co compositions ...
  • Elastic and thermodynamic properties of potentially superhard carbon boride materials 
    Letsoalo, T.E.; Lowther, J.E. (Сверхтвердые материалы, 2012)
    Boron icosahedral structures are the basic building structures of many important hard borides and especially В₄С. The structural and thermodynamic properties of В₄С have been examined applying molecular dynamics simulation ...
  • Electronic structures and mechanical properties of boron and boron-rich crystals (Part 2) 
    Shirai, K. (Сверхтвердые материалы, 2010)
    The second part of this review treats the phase diagram of boron, because of the importance of the material research. A comparison of the phase stabilities of related crystals has been made and deducing general trends among ...

Пошук


Розширений пошук

Перегляд

Мій обліковий запис