Results 21 to 30 of about 19,767 (230)
MATEC Web of Conferences, 2018 Ti-6Al-4V components are the most widely used titanium alloy products not only in the aerospace industry, but also for bio-medical applications. The machine-ability of titanium alloys is impaired by their high temperature chemical reactivity, low thermal
Jia Yunhai, Zhu Lixin
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Polycrystalline γ-boron: As hard as polycrystalline cubic boron nitride [PDF]
Scripta Materialia, 2012 The Vickers hardness of polycrystalline -B was measured using a diamond indentation method. The elastic properties of polycrystalline -B (B=213.9 GPa, G=227.2 GPa, and E=503.3 GPa) were determined using ultrasonic measurement at ambient condition.
Qin, Jiaqian +6 more
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Hard machining of agricultural machines parts
Research in Agricultural Engineering, 2013 For the renovation and/or improvement of the surface properties of machine elements, hard facing is often used. Hard structures obtained in layers or by heat treatment achieve a hardness of up to 68 hardness (HRC) or even more.
R. Drlička +4 more
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Solid-state metathesis reactions under pressure: A rapid route to crystalline gallium nitride [PDF]
, 1998 High pressure chemistry has traditionally involved applying pressure and increasing temperature until conditions become thermodynamically favorable for phase transitions or reactions to occur.
Heath, James R. +6 more
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Synthesis of cBN-hBN-SiCw Nanocomposite with Superior Hardness, Strength, and Toughness
Nanomaterials, 2022 Nanocomposites with one-dimensional (1D) and two-dimensional (2D) phases can demonstrate superior hardness, fracture toughness, and flexural strength. Cubic boron nitride-hexagonal boron nitride-silicon carbide whiskers (cBN-hBN-SiCw) nanocomposites with
Lei Sun +10 more
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Spontaneous graphitization of ultrathin cubic structures: A computational study
, 2014 Results based on {\em ab initio} density functional calculations indicate a general graphitization tendency in ultrathin slabs of cubic diamond, boron nitride, and many other cubic structures including rocksalt.
Kvashnin, Alexander G. +3 more
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Carbides and Nitrides of Zirconium and Hafnium. [PDF]
, 2019 Among transition metal carbides and nitrides, zirconium, and hafnium compounds are the most stable and have the highest melting temperatures. Here we review published data on phases and phase equilibria in Hf-Zr-C-N-O system, from experiment and ab ...
Hong, Qi-Jun +3 more
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HETERO-GRAPHENE AND HETERO-DIAMOND PHASES SYNTHESIZED IN THE B-C-N SYSTEM UNDER PRESSURE [PDF]
Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2013 The phases formation in the B-C-N system at thermobaric treatment of mixtures of carbon nitride or melamine with boron has been studied. It was found that in the pressure range of 4-8 GPa graphite-like particles were formed first.
V.P. Filonenko +3 more
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Superhydrophilic cubic boron nitride films
RSC Advances, 2016 Preparation of superhydrophilic cubic boron nitride (cBN) films with contact angles of polar and apolar liquids of almost zero degree.
Kungen Teii +2 more
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Advances in Mechanical Engineering, 2020 Micro-textured cutting tools were widely reported due to the improved cutting performance, for example, the reduction of cutting forces. However, the cutting performance is significantly dependent on the parameters of the micro-textures.
Haidong Yang +8 more
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