Materials Literature
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Features of the method of conduction electron spin resonance (CESR) for investigation of physical and chemical transformations in conductors are demonstrated using the example of such investigations with graphite and its intercalation compounds (GICs). The following issues are considered in detail: conduction electron…
隨著人口密集及經濟成長，火災對社會造成的傷害與日俱增；希望藉由本論文之研究，能改善現行一齊開放閥之諸多缺失，令使用功能獲得改善，以增強消防系統功能，及為延長耐用年限。而與一齊開放閥相搭檔的自動警報逆止閥，亦可藉由本文之論述，力行改善。\n本論文利用3D繪圖軟體Soild Works來進行結構設計，並且在CAE的部份，我們對一齊開放閥的關鍵零組件如閥體、閥蓋進行模擬特性分析。 應用COSMOSXpress分析軟體，經由設定重要零組件的材質、負載、及拘束面，做有限元素分析，透過軟體產生實體網格，以分析變形量、應力分佈等。一般材料會在高於降伏強度或遠較極限抗拉強度大之荷重下，發生破壞，分析結果以了解是否可能因變形造成洩漏、破壞問題，並利…
El trabajo se centró en la caracterización y el estudio de las propiedades térmicas de una poliamida impar, el nylon 3, debido a su potencial aplicación como material con propiedades eléctricas activas. La poli-B-alanina o nylon 3 (-NH -CH2 -CH2 -CO-)n, es un polímero cristalino que se caracteriza por tener una elevad…
Several approaches to obtain theoretical strength experimentally are discussed. Original data concerning material behavior in nanocontacts, along with loss of stability, dislocation homogeneous nucleation, initial plasticity and size effect mechanisms are presented. It is shown the plasticity size effects caused by ch…
A series of new esters (sulfate, nicotinates, and 4-methoxycinnamate) of 18α-glycyrrhizic acid (18α-GA) representing a D/E-trans-isomer of the natural 18β-GA (GA), the major triterpene glycoside in the roots of Glycyrrhiza glabra L. and Gl. uralensis Fisher, have been synthesized. It is established that a change in th…
Bu çalışmada, alüminyumun iletken polimer bir malzeme olan polianilin ile elektrokimyasal yöntemle kaplanması,kaplanan yüzeyin korozyon öncesi ve sonrası mikroyapısı incelenmiştir. Polianilin kaplama işlemi, okzalikasit çözeltisinde, iki farklı anilin konsantrasyonunda, potansiyel taraması yöntemi ile yapılmıştır. Kap…
The defects analysis of standard teat cups used in modern milking pipelines are analyzed. Original teat cup constructions with a changeable teat compression plain are described. Such a design stimulates the lactation reflex to a great extent, has a soft impact on the teat and allows complete milking out of cows.
Bahan komposit pada saat sekarang ini banyak digunakan dalam komponen otomotif juga untuk pembuatan komponen pesawat terbang, perkapalan, arsitektur, peralatan olahraga dan militer serta barang kebutuhan sehari-hari. Material komposit berpenguat serat (fibrous composite) dengan menggunakan serat kenaf (Hibiscus Cannab…
Sliding bearings at three cone bits are lubricated in heavy conditions. To improve tribological behaviour, samples of bearing materials were made with implants with antifriction materials having different rapports between the implant and free base material in the presence of different greases. Tests made on a CSM micr…
ÖZETAğız dışına yapılan protezler plastik materyalden yapılıp defektlerin onarılması ve kapatılması için kullanılırlar. Bu çalışmada elektirik çarpması sonucu sol kulak kaybı yaşayan hastanın implant destekli kulak protezi ile tedavisi anlatılmıştır
Ce travail se situe dans le cadre de developpements recents dans le domaine de la protection contre la corrosion qui visent a synthetiser des revetements ayant des proprietes d'auto-cicatrisation. Dans ce contexte, cette these est basee sur la synthese, la caracterisation et l'evaluation des performances vis-a-vis de…
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A thin layer of poly methylen green (PMG) was covered on glassy carbon (GC) electrode surface by electrochemical polymerization method. In the next step by dropping a suspension of carboxylic acid functionalized carbon nano-tubes on the PMG/GC electrode a layer of CNTs was coated on the electrode. Thereafter, to immob…
Main reasons for causing vibration in a permanent magnet synchronous motor (PMSM) are torque ripple and radial force harmonics, and hence, both of them are undesirable in high-precision machine tools and accurate motion-control actuators. Recent research on radial force is the prediction of major vibration frequencies…
This thesis concerns biogas-operated fuel cells. Fuel cell technology may contribute to more efficient energy use, reduce emissions and also perhaps revolutionize current energy systems. The technology is, however, still immature and has not yet been implemented as dominant in any application or niche market. Research…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text T. Hasegawa, "High Refractive Index Bi2O3- B2O3-TeO2 Glass with High Visible-NIR Transmittance," in National Fiber Optic Engineers Conference, OSA Tech…
problems connected with definition of area deterioration of burnishing tools. Work out mathematical model for computation the area of the wear-out tool depend on conditions of machine processing
BiFeO₃(BFO)/Pb(Zr 0.52 Ti 0.48 )O₃(PZT) bilayer와 multilayer의 다층구조를 만들어 전기적 특성을 측정하여 같은 두께의 BFO 단층박막과 비교해 보았다. BFO와 PZT 용액을 이용하였으며 chemical solution deposition 방법으로 Pt/Ti/SiO₂/Si(100) 기판위에 각 박막을 증착하였다. X-ray diffraction 분석을 통해 모든 박막이 다배향(multi-orientation) 페로브스카이트(perovskite) 구조를 가졌음을 확인하였다. BFO/PZT Bilayer와 multilayer…
The objectives of this research are the preparation and characterization of Multi-Walled Carbon NanoTubes (MWCNTs)/Graphite Nanosheet (GNS) /Epoxy hybrid composites. There are three parts in this study. The first part of this research is the surface treatment of multi-walled carbon nanotubes (MWCNTs) by free radical r…
The methodical approach to definition of corrosion resistance of the oxide overlay generated on aluminium alloys by mode MDO is offered. Duration of collapse of a coating under the influence of pressure of yields of corrosion of a metal basis taking into account a thickness, physical-mechanical properties and corrosio…