Materials Literature
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A model is derived for the reflectance optimization of an inhomogeneous coating made of absorbing materials. The model is applicable mainly for spectral regions where no transparent materials are available, such as in the extreme ultraviolet. The complex refractive index is assumed to take values within a given contin…
Stress corrosion cracking (SCC) susceptibility of commercial type 316L stainless steel (SS) and 316 SS hot rolled plates was examined by the creviced bent beam method in oxygenated high temperature water at 561 K. Asreceived type 316L SS and 316 SS showed the highest susceptibility to SCC at the cold rolling reduction…
Non-stoichiometric Ni 50 Mn 27 Ga 23 polycrystalline ribbons are prepared by melt-spinning technique. The magnetic-field-induced strain (MFIS) of Ni–Mn–Ga bulk alloy prepared by bonding the melt-spun ribbons is obtained. The experimental results show that Ni 50 Mn 27 Ga 23 bonded ribbons exhibit a typical thermal-elas…
21世紀の情報, 環境, エネルギーなどを支える機能材料化学を飛躍的に発展させるためには, 材料のさらなるスケールダウンが必要不可欠である. 材料をナノレベルで設計し, 創製する際のエレメントとなる超薄膜や微粒子などでは, 試料全体積に対する表面および界面の割合が著しく大きくなる. このため, ナノサイズの材料を組織化しデバイスを構築する際には, マクロスケールの材料で蓄積された構造-物性相関はもはや意味をなさない. 高分子材料の場合, 分子鎖一本の空間的拡がりは一般に数十から数百ナノメートル程度であるため, 構造および物性へのサイズ効果は, 有機低分子や無機材料と比較して顕著である. 本報では, 高分子表面, 界面および超薄膜に…
The mechanical and dielectric breakdown properties of polylactic acid (PLA) and PET copolymer, which are biodegradable plastics, were examined, and physicochemical analysis were performed. At room temperature, the Young's modulus of PLA and PET copolymer were about 3.6 GPa and about 3.9 GPa, respectively. Moreover, th…
The two most common condenser tube problems faced by chemists are internal tube fouling and tube failure. Fouling can have a major impact on power station generating efficiency and capacity, and tube leaks can seriously impact unit availability and reliability. Fundamental understanding of the root cause(s) of these i…
Metallic tokens had been stored in direct contact with polyurethane foam since the mid 1970s. Upon examination in 2004 the foam was found to have badly deteriorated and some of the tokens showed signs of corrosion. The surfaces of copper and brass tokens were speckled with dark stains, green stains were visible on pew…
Abstract Manganese sulphate crystals can be produced in laboratory‐scale batch crystallisers by either heating or by salting‐out crystallisation. However, manganese sulphate produced through heating forms monohydrate while salting‐out mode will form the tetrahydrate. The effects of various operating conditions includi…
Influences of electron beam (EB) irradiation on the impact value for silica glass were studied by using a standard Charpy impact test. EB irradiation below 0.216 MGy, which was one of short-time treatments of dry process at low temperature, increased impact values of the glass. As the EB irradiation generated dangling…
Both the acoustic emission (AE) and corrosion potential fluctuation were monitored for chloride SCC of sensitized Type-304 steel plate under bi-axial stress state. Branched SCCs were produced from rectangular-shaped corrosion pits initiated by falling-off of surface grains and filled with chromium oxide in 30mass% MgC…
Cyclic and bicyclic oligosiloxazanes were synthesized by the reaction of 1,3-diamino-1,3-di-t-butoxy-1,3-dimethyldisiloxane with 1,1,3,3-tetraisocyanato-1,3-dimethyl-1,3-disiloxane (M-TIDS) in 1 : 1 and 1 : 2 molar ratios, respectively. Based on these results, polysiloxazane M-PSZ was prepared by the ammonolysis of M-…
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 Yu. A. Ilinskii, M. F. Hamilton, E. A. Zabolotskaya, G. D. Meegan; Influence of compressibility o…
The paper presents the results of investigations involving the influence of aging and annealing of the sol films on the final parameters of the obtained silica films. Both technological process and measurement method were described. The changes of refractive index were presented as well as the changes of film thicknes…
Efficient lightning protection of wind turbine blades is dependent on reliable direction of the lightning current to metallic air terminals implemented in the blade structure. Proper design needs knowledge of streamer initiation and propagation in the whole tip area and the essential parameters influencing this proces…
Description Thirty-one peer-reviewed papers provide the latest international research on the radiation effects on materials. Topics cover
Development of corrosion-resistant magnesium alloys was reviewed.Effect of the main alloying elements(Al,Zn,Mn,Ca,Zr,RE) on microstructure and corrosion resistance of magnesium alloys were introduced respectively.Potential development tendencies and research approaches about corrosion-resistant magnesium alloys were p…
In order to reduce the brittle fracture of high voltage composite insulators, an effective method for protecting Fiber Reinforced Plastics (FRP) rod free from brittle fracture is provided except for using boron-free rod. A layer of flake coating, which can form a valid safeguard to stress corrosion cracking (SCC), in…
The metal heat-treatment was classified in mechanism into three types by comparatively analyzing the heat treatments of titanium alloy,aluminium alloy and steel.The heat treatment of titanium alloy was thought to be the third kind of heart treatment.The main transitional phases in titanium alloy during heat treatment…
SF6 gas is widely used in electric power apparatus such as gas insulated switchgears (GIS), because of its superior dielectric properties; however, it has been identified as a greenhouse gas at COP3 in 1997, alternative insulation gases to SF6 are recently investigated. The one of the candidates is CO2 gas, which has…
Recently, it has been shown that the addition of a small quantity of nanoclay can greatly enhance the efficiency of low profile additives (LPAs) on volume shrinkage control of low profiled unsaturated polyester (UP)/styrene/LPA systems. In this study, however it was found that the organically-modified nanoclay (Cloisi…