Materials Literature
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Dalam menganalisis sifat-sifat bahan komposit, maka bejana tekan silinder dinding tipis dapat digunakan sebagai suatu benda uji yang tepat. Bejana tekan silinder adalah struktur tertutup yang mengandung udara yang bertekanan. Bahan silinder ini terdiri dari baja karbon pada bagian luar dan paduan tembaga pada bagian d…
通过钛箔、铝箔叠加烧结制备出微叠层Ti-Al系金属间化合物合金板材。对不同烧结条件下获得的板材组织和相组成进行分析。结果表明,当烧结温度到达到Al的熔点以上时,高温自蔓延反应（SHS）在Ti箔和Al箔之间发生,生成α-Ti、Ti3Al、TiAl、TiAl2和TiAl3等相;随着烧结时间的延长,α-Ti、TiAl2和TiAl3逐渐消失,最终获得包含Ti3Al和TiAl的叠层结构板材。由于铝的熔化,柯肯达尔效应和反应前、后摩尔体积的变化在烧结过程中产生大量的孔洞,随后的热压处理将孔洞消除并获得致密的合金板材。
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2011.
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Detailed finite-element calculations are carried out to examine the path-dependence of the J-integral in a pseudoelastic Shape Memory Alloy (SMA) for mode I loading under the approximation of linear kinematics. The evolution equation for the transformation strain is consistent with the classical rate-independent J2 fl…
The problem of creating heatresistant composites with brittle components is considered. The conditions for optimal fiber coating and for maximum energy dissipation due the fiber pull-out mechanism are investigated. The model of unidirectional fiber composite with a crack within the steady state creep and low-cycle thr…
Ces travaux de these portent sur la conception de composants microondes innovants, reconfigurables par voie optique. L’objectif principal de la these est de proposer des solutions alternatives aux methodes de reconfigurabilite actuelles comme les MEMS ou les diodes par exemple. Dans ces travaux nous nous sommes intere…
在水热条件下（160℃），通过十二硅钨酸（H4[SiW12O40】-14H2O）、氯化铜（CuCl22H2O）和1,4-二（1H-1，2，4-三氮唑-亚甲基）苯反应，合成了结构新颖的多酸基配合物[Cu2（bbtz）4（SiW12O40）】（1）．X射线单晶衍射结果表明，该配合物中的金属一有机框架是一个具有六边形孔道的三维网状结构，而杂多阴离子[SiW12O40】4-作为四连接点以配位键连接到六边形孔道内，形成一个基于多酸的高维、高连接网络．
In this paper we are going to present the improvements of the dynamic method for examining the membranes of landmines firing pin. The application of the modern measuring equipment provides and allows easy repeatability of a large number of trials of physical processes for which there are not enough theoretical knowled…
以NH4HC03溶液为沉淀剂，采用共沉淀法制备了前驱体，在氩气气氛中经1200℃煅烧2h合成了Y2.91-xCe0.06TbxAl5O12（YAG：Ce，Tb）粉体。利用X射线衍射仪、透射电子显微镜、荧光光谱仪对样品的结构、形貌及发光性能进行了表征。所得粉体为体心立方相YAG：Ce，Tb。粉体颗粒团聚成珊瑚虫形。YAG：Ce，Tb粉体的激发光谱有3个激发带，峰值分别位于275nm（Tb^3＋的4f^8→4f^75d^1跃迁）、341nm和450-470nm（Ce^3＋的4f^1→4f^05d^1跃迁）。用275nm的紫外线激发YAG：Ce，Tb粉体，得到了Tb^3＋和Ce^3＋的特征发射带。用460nm的蓝光激发YAG：Ce，Tb…
Exploration results in a field of ionizing radiation of different kind effect on electrical properties of solids are presented in this study. Theoretical explanations of considered processes are suggested. Models that interpret observed effects are considered.
For the space of Hermitian cubic splines of a kind ( ) ( ) ( ) 2 1 2,0,1,0,1 1 0 S N N, L L L L L L L i i i i i i u C u C u − = = = + a ≤ u ≤ b, with a uniform net of knots L : ui = a + (b a) i / 2L, i = 0, 1,…, 2L, L ≥ 0, and basic functions ( ) ( ) NL, l j l i k u j = i ⋅ k , with the centres in integers, it i…
This thesis aimed at completing the study of the properties of iPP modified with an hydrogenated oligomer resin (Escorez-ESC) and at improving these properties by making nanocomposites with the addition of two clays (modified one 67G and unmodified one HPS) for possible use in the food packaging sector. The study of t…
ABSTRAK Dayati, Eli. 2010. Sintesis dan Karakterisasi Mangan Ferit dengan Metode Presipitasi. Skripsi. Jurusan Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Semarang. Pembimbing I: Dr. Agus Yulianto, M.Si, Pembimbing II: Dra. Upik Nurbaiti, M.Si Serbuk Mangan Ferit telah dibuat melalui metod…
Mineral associations, in clay fractions of three Barind (Amnura, Lauta and Nijhuri soil series) and three Madhupur (Gerua, Chandra and Kalma soil series) soils have been identified and quantified by X-ray diffraction supplemented by chemical analysis. Kaolinite was the dominant mineral in both Barind and Madhupur Trac…
We present simulations of halos and sprites, resolving the many length scales of the underlying problem.We account for air density changing with altitude, and model the parent lightning stroke in electrostatic approximation.We discuss how the emergence properties of sprite streamers depend on the temporal evolution of…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Dipak Kumar Baisnab, T. Geetha Kumary, A. T. Satya, Awadhesh Mani, J. Janaki, R. Nithya, L. S. Va…
Brasses are widely used as constructional materials in marine environment due to their anticorrosive,antifouling and mechanical properties.However, its resistance to corrosion and fouling may vary according to local marine environmental condition and the seasons.The dezincification of brass is one of the forms of sele…
Development of Direct Methanol Low Temperature Fuel Cells from a Polygeneration, Perspective
The magnetic and optical properties of divalent europium are of interest for catalysis, materials, magnetic, diagnostic-medical, and luminescence applications. Use of the aqueous Eu⊃II⊃ ion in these applications is limited due to the instability of Eu⊃II⊃ in the presence of air. To increase the use of Eu⊃II⊃ in these…