Results 31 to 40 of about 4,813 (241)
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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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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Synthesis of Cubic Boron Nitride
Journal of the Ceramic Association, Japan, 1970 Cu5Sn, Cu5Sn8,Mg9Sn91合金あるいは Mg 金属の1部と, 六方晶 BN の4部の混合物を白金チューブに充填し, 改良ガードル型高圧装置を用いて, 最大約 80kbar, 2200℃, 30分間の条件下で処理した。不純物を酸で分離後, 合成立方晶 BN をデバイ・シェラーX線回折図形, 硬度試験などで同定した。例えば Cu5Sn 合金の場合, zinc-blende 構造をもつ立方晶 BN を約 1000℃, 40kbarの条件下で合成した。結晶の大きさは数0～ 数100μ であり,色相は灰色,暗黒色,白色などであった。六方晶〓立方晶 BN 平衡線は Wentorf の実験的平衡1線の延長上に存在した。Mg9Sn91合金と Mg 金属の場合, おのおの約 1000℃, 32kbar,
SAITO, Hajime +2 more
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Nonoxide Sol-Gel Synthesis of Terbium-Doped Silicon Nitride Phosphors
, 2009 Exposure of solutions of Tb(N(SiMe3)2)3 with SiCl(NEt2)3 in tetrahydrofuran to dry ammonia results in polymeric xerogels. Heating these gels in ammonia leads to amorphous Tb:SiNx phosphors that exhibit bright green luminescence under UV irradiation.
Hector, Andrew L. +3 more
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Reaction bonded aluminum oxide composites containing cubic boron nitride
, 2022 S.909-911The properties of alumina can be improved by incorporating second phases like zirconia or carbides. It has also been reported that reaction bonded aluminum oxide (RBAO) process can be used as a host matrix for large scale second phase ...
Coville, N. +3 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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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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Advanced Engineering Materials, EarlyView.Aluminum and nitride coatings are used in industry because they are hard, resist wear, and protect against oxidation. Adding boron can improve friction behavior and other properties. This study tests coatings on surfaces with different finishes. Results show smoother surfaces perform better, while rough ones wear faster, although coatings can reduce ...
Adrián Claver +9 more
wiley +1 more source
A new generation, promising engineering material: Cubic boron nitride c-BN
Hittite Journal of Science and Engineering, 2015 In order to meet the design requirements and expanding demands in various engineering fields, it is essential to incorporate new technological improvements in material sciences into existing processes and applications.
Baris Cetin +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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