Materials Literature
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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 Zhengyu Zhang, Glaucio H. Paulino, Waldemar Celes; Cohesive Modeling of Dynamic Crack Growth in H…
A meso-palladioporphyrin intermediate was isolated from a Heck reaction between an iodoporphyrin and a non-activated olefin using a Pd(PPh3)2Cl2/Et3N system; its structure was characterized by NMR, MS and X-ray crystallography. Studies on its formation indicate that the Pd(II) catalyst was reduced in situ by Et3N with…
It has been investigated that the correlation between the phase separation and glass compositions in the SiO2–CaO–MgO–Na2O quaternary oxide glasses. The metastable miscibility gap and the spinodal region in the quaternary system have been evaluated from Gibbs energies in the metastable liquid phase, on the assumption…
The effect of chemical composition on delayed fracture resistance, taking into consideration the application of a 1470 MPa grade thin-wall as-rolled electric resistance welded (ERW) tube to automotive structural parts, was investigated. Chemical composition of the base steel alloy was 0.18%C–0.4%Si–1.8%Mn–0.015%Nb–0.0…
Effects of the alloying element on processing of the environmental-friendly anodizing were investigated in various AZ series magnesium alloys. The phosphate solution was used mainly in the current process without the need for the deleterious materials such as heavy metals or fluoride. Also the characteristics of the f…
We investigated by differential scanning calorimetry the effect of ball milling on the hydrogenation properties of Mg2Cu, a hydrogen storage alloy, prepared by two methods: One is mechanically alloyed Mg2Cu using Mg and Cu powders as starting materials. Eight hours (=28.8 ks) of ball milling transformed the Mg:Cu=2:1…
A positive-type photosensitive polyimide (PSPI) based on poly(amic acid) (PAA), 1,3,5-tris[(2-vinyloxy)ethoxy]benzene (TVEB) as a crosslinking dissolution inhibitor and a photoacid generator (PAG) has been developed. PAA was prepared from pyromellitic dianhydride (PMDA), 2,5(6)-bis(aminomethyl)bicyclo[2.2.1]heptane (N…
Polypropylene/layered silicate nanocomposites containing maleic anhydride grafted polypropylene were prepared by melt compounding and their rheological behavior was investigated in shear flow. Transient and steady shear flows were simulated numerically by using the K-BKZ integral constitutive equation along with exper…
Art. 012005, 12 S.
Luminescence characteristics of Er3+-doped Li2O-Al2O3-SiO2 (LAS) glass and glass-ceramic were evaluated by measuring their absorption spectra, fluorescence spectra and fluorescence lifetime. The absorption cross section of 4I13/2 - 4I15/2 transition at 1.5 μm increased after cerammization. In contrast, fluorescence in…
Abstract The influence of magnetic field on the band structure of carbon nanotube superlattices is investigated. In particular, we study superlattices built of finite sections of (6,6) and (12,0) tubes connected by pentagon/heptagon topological defects. Magnetic field is parallel to the axis of the superlattice. We de…
Model of the heat balance in an element of a solid oxide fuel cell (SOFC) a fragment of bipolar plate with the linear air channel) is developed. Stability analysis of heat transport equations shows that stack operation is unstable with respect to small long-wave perturbations in temperature . Expressions for the criti…
Bulk, surface and bioactivity of newly synthesized hydroxy telechelic polyisoprene-based (H-HTPI) polyurethane were investigated by means of ATR-FT-IR, contact-angle measurements, cell viability, calcification, and platelet and fibrinogen quantification. The influence of isophorone diisocyanates isocyanurate (I-IPDI)…
The effects of ZrO2 on the crystallization behaviors of ZnO-Al2O3-SiO2 glasses were investigated in order to prepare transparent glass ceramics containing ZnAl2O4 nano-crystal. Nucleation in 20ZnO·20Al2O3·60SiO2 glass proceeded vigorously at the temperature range between 775°C and 825°C. Though a few silic…
Data about distribution of Bangia atropurpurea (Roth) C. Agardh indicate that this species was found on relatively small number of localities in freshwaters in Europe and world. In Red List of Algae, in some countries, this species is defined as a extinct (Ex) (Poland) or as endangered (En) (Slovakia). In this study,…
The continuous monitoring of the oxygen chemical potential at a surface of a growing oxide surface formed in high temperature oxidation of a metal was developed. During the oxidation of nickel and cobalt at 1373 K in Ar-21%O2 gas, the oxygen chemical potentials at the surface of formed NiO scale and CoO scale were sli…
19.5年 (19年6ヶ月) 海洋曝露された無防食普通裸材 (アングル材) を対象にして，レーザ式表面形状測定装置を用いて精密な腐食形状計測を行い，腐食形状および板厚分布を把握した．これらのデータから海上部，飛沫帯，干満帯，海中部の腐食損傷度に関して，計測ピッチの違いによる表面形状の再現性を明らかにした．さらに，過去の計測データである2.5年，5.5年，9.5年，14.5年経過時のマイクロメータによる計測結果と対比させながら腐食形態と腐食速度の関係を明確にし，板厚計測する測定箇所の設定および板厚評価法の基礎資料を提供した．
The Fe-Pd ferromagnetic shape memory alloy is a multifunctional material. We investigated the behavior of the superelastic properties of rapidly solidified Fe-Xat%Pd (X=29.3, 29.6, 30.2 and 30.4) alloy ribbons to develop biomedical materials applicable to orthodontics and medical instrumentation. The appearance of a s…
Diamond-like carbon (DLC) is being advanced as an excellent surface modification technology for a growing number of applications because of its low friction coefficient and excellent wear resistance. Due to the excellent characteristics of certain mechanical elements, such as a bearing, high levels of functionality ar…
We prepared nanorods of octabutoxyphthalocyanine (ObPc) with an average diameter of 200 nm by filling porous alumina with molten ObPc. During solidification of ObPc in the porous alumina, a magnetic field of 5 T was applied to orient the ObPc molecules in the nanorods based on the diamagnetic character of ObPc. X-Ray…