Materials Literature
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Electronics is different from power electrical engineering in two major respects. The range of frequencies involved is typically restricted to 1 kHz in power electrical engineering, whereas it extends to the microwave regime, beyond 1 GHz, in electronics. The excitation level of magnetic materials is near saturation i…
Results of detailed calculations for SrTiO3 (100) surface relaxation and the electronic structure for the two different terminations (SrO and TiO2) are discussed. These are based on ab initio Hartree‐Fock (HF) method with electron correlation corrections and Density Functional Theory (DFT) with different exchange‐corr…
Thermal reactions of sputtered Cu films on the fluorinated silicon oxide (FSG) and organosilicate glass (OSG) layers, with and without TiN or TaN diffusion barrier, were investigated. The sheet resistance, surface morphology, phase formation and compositional depth profile of the mutilayer structures after vacuum anne…
To evaluate crack initiation from small radius flaws in Zr-2.5 Nb pressure tubes in operating CANDU reactors, a number of crack initiation tests under both monotonic and cyclic loading in notched tension specimens have been carried out at ambient temperature. Test specimens were machined with the tensile axis parallel…
This paper describes the relationship between hydrogen pressure and temperature (P-T curve) in the HDDR treatment of the Sm2Fe17 compound. The P-T curve suggested that the HDDR condition of the Sm2Fe17 compound is more sensitive to temperature than that of the Nd2Fe14B compound. It was also found that the HDDR treatme…
We studied by grazing incidence X-ray diffraction the behavior of the amorphous and crystalline diffractogram areas of corn pericarp samples taken during a typical nixtamalization process. The pericarp amorphous part suffers two dissolution processes, one fast, due to the dissolution of the water- and alkali-soluble p…
The phonons in multi‐walled carbon nanotubes (MWNTs) are studied within a force‐constant model and a continuum model. Special attention is given the low‐frequency modes that are most affected by nesting of the separate layers into a MWNT. First, a MWNT has four acoustic branches, which determine its elastic properties…
Small amounts of aluminum (1 to 3 wt% Al) were alloyed with copper to study oxidation resistance at high temperatures. Pure copper and the alloyed samples were oxidized from 700 to 1000 °C in air for various lengths of time. The oxidation rates of the samples increased with temperature. The oxidation rates of pure cop…
A conceptual-scale continuous pyroelectric converter was constructed and tested. Low-grade heat was converted to electricity using a single 25 @ m thick 60%-40% P(VF 2 -TrFE) copolymer film. A pyroelectric conversion cycle conceived by Olsen was adopted; external control voltage was cycled between high and low in sync…
α′-SiAlON containing Sr, having a large ionic radius, was obtained by hot-pressing. Sr was accommodated in α′-SiAlON in conjunction with Y. The effect of adding Sr to Y-α′-SiAlON on thermal conductivity and mechanical properties was studied. Thermal conductivity decreased from 11.9W/m·K to 6.2W/m·K with increasing add…
A stochastic model for predicting the strength and reliability of unidirectional fiber-reinforced ceramic matrix composites is proposed, in order to find theoretically statistical properties in strength of the composites, composed of constituents with large variations in strength. In the proposed model, mechanical beh…
Based on the analysis of the K 2 O-P 2 O 5 -D 2 O solubility phase diagram, the optimum conditions of KD 2 PO 4 crystallization—the compositions of mother solutions and the temperature range of crystallization—in the KH 2 PO 4 -D 2 O system have been determined. The technique of K(D x H 1 − x ) 2 PO 4 growth is develo…
We have investigated an effect of vanadium or aluminum into titanium alloys on the formation of Kirkendall voids in titanium region in diffusion bonds between titanium and molybdenum. The influence of bonding conditions on the joint stregnth has been also investigated. The bondings were performed under bonding tempera…
アミロペクチンからなるワキシコーンスターチを用いてアクリル酸デンプンを合成し，さらに架橋することによりデンプンの機能化を検討した．高置換度のアクリル酸デンプンは，ピリジン中でデンプンにアクリル酸無水物を作用させることによって得られた．高置換度アクリル酸デンプンを用いた重合では，分枝構造による立体障害などによって架橋ポリマーを得ることができなかったが，高置換度アクリル酸デンプンとアクリル酸とを共重合すると，架橋反応物が得られた．この共重合体の架橋部分は重合度の低いアクリル酸重合体であり，生分解性ポリマーの原料として用いることができると思われる．一方，低置換度アクリル酸デンプンとアクリル酸との共重合では，架橋デンプンは得られなかった．
(2002). Producing copper‐plated welding wire. Welding International: Vol. 16, No. 8, pp. 666-668.
A small amount of LaAlO3 added to a La2O3:3TiO2 starting oxide mixture stabilizes the A-deficient La2/3TiO3 perovskite structure. According to XRD and microstructural investigations of samples prepared in the ternary system at 1400?C, only the solid solution along the La2/3TiO3-LaAlO3 tie-line extends from at least 4…
The functional properties of liquid crystal (LC) thin films are correlated to their structure and microstructure. Moreover, not only phase and order of LC are important parameters influencing these properties, but also thickness, density, and roughness of the film. In this paper a study of multilayer systems LC/ITO/gl…
The crystal structure and the dielectric properties of the antiferroelectric solid solution of (1 m x )Pb(Yb 1/2 Nb 1/2 )O 3 m x Ba(Yb 1/2 Nb 1/2 )O 3 (Pb 1 m x Ba x YN) (0 h x h 0.30) have been studied. The crystal structure is shown to become pseudocubic from the PYN's orthorhombic structure on solutionizing for x >…
The interest in ultra-high-purity (UHP) metals and alloys (including single crystals and bicrystals) in studying damage mechanisms is presented through three practical cases of environment or precipitation-induced damages in nuclear power plants. First, stress corrosion cracking mechanisms are assessed by direct measu…
We carried out a complex spectroscopic study of CaTiO 3 . The dielectric, submillimeter, infrared and Raman measurements in broad spectral and temperatures ranges were performed. We found in all experiments similar behavior of the soft mode, whose frequency varies from 110 to 70 cm m 1 on cooling from room temperature…