Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The cohesive properties and chemical stability of diborides MB2 have been analysed using the results of full-potential LMTO calculations. A comparison of interatomic M–M, M–B and B–B interactions in MB2 phases (M = Ti, V, Zr, Nb) shows that the changes in the cohesive properties are mainly controlled by the strength o…
The dynamical behaviour of an isolated combustible gas bubble surrounded by unlimited inviscid liquid is analysed in the case of large activation energy and using spatially uniform assumptions. The pressure effect is crucial in this problem because of the limited gas volume. The mathematical model used is a system of…
Exceedingly high strength hasbeen anticipated for carbon nanotubes since their discovery, promising novel material applications. The strength of carbon bonds and their perfect arrangement within the walls suggests indeed an extreme stiffness along the axis, combined with resilience in other directions. Both experiment…
Al2O3/aluminate composites were fabricated by a solid reaction in the La2O3-Al2O3 system. The formed phase showed elongated morphology that could be controlled by varying the hot-pressing temperature and time. Dense Al2O3/LaAl11O18 composites were fabricated by hot-pressing above 1500°C. When the hot-pressing temperat…
1.
The novel complexes [1,9-bis(2-pyridyl)-2,5,8-triazanonane]-(protoporphyrinato)iron(III) 4, -(mesoporphyrinato)iron(III) 5 and -(deuteroporphyrinato)iron(III) 6 were synthesized from the parent compounds chloro-(porphyrinato)iron(III) 1, -(mesoporphyrinato)iron(III) 2 and -(deuteroporphyrinato)iron(III) 3 and 1,9-bis(…
In this paper the application of neural network (NN) to the probabilistic inference of partial discharge (PD) phenomena generated from electrical tree growth is presented. On the basis of experimental results of measurements of trees occurring in a needle-plane arrangement, stochastic quantities are derived, which are…
In this paper, we present a method to avoid hysteresis in magnetostrictive-piezoelectric sensors. It is based on the application of an alternating magnetic field of a frequency different than the piezoelectric exciting frequency that supplies enough energy to overcome any domain wall pinning. The signal is filtered wi…
(CH3)2NC6H4NC6H4O is a merocyanine dye that exists in resonance between the two extreme conformations of a keto and an eno form. The keto form is more stable in the gas phase and the eno form is believed to be more stable in solution. We show that the keto form can prevail in nonpolar solvents, but in polar solvents l…
This paper aims to determine the electromagnetic forces acting in a power transformer, when a current corresponding to the first peak of a three‐phase circuit flows in the windings. The finite element method for the evaluation of the field’s values is applied, and the electromagnetic forces acting in a power transform…
Materials with high elements (C, B, N. . . ) appear to be a great interest for the future. The most dense forms of these materials are characterized by exceptional physico-chemical properties (diamond, c-BN, β-C3N4. . . ). The last material (C3N4) issued from "ab-initio" calculations has instigated the development of…
Two new radical cation salts, (BETS)6Bi3Cl12·PhCl 1 and (BETS)2Bi2Cl8 2, where BETS is bis(ethylenedithio)tetraselenafulvalene, have been obtained and their structures and conducting properties studied. Salt 1 has a layered structure, consisting of radical cation layers of the α type, and segregated anion sheets conta…
We examined the regulation of collagenase production by the monocyte/macrophage THP-1 cell line when these cells were exposed to poly(2-hydroxyethyl methacrylate) (PHEMA) hydrogel surfaces with different chemistries and morphologies. Tissue culture modified polystyrene (TCP), used as a control surface, induced the max…
Recycled newsprint (ONP) and dry process aspen fiber were combined with styrene maleic anhydride (SMA) copolymers containing either 7 or 14 percent maleic anhydride. The fiber-filled SMA composites were equivalent or superior to unfilled SMA in strength, stiffness, and notched Izod impact strength. ONP performed surpr…
It is known these days that case-hardening bearings have a longer life than through-hardening ones under severe lubrication conditions (i.e. mixing-in of foreign particles in the lubrication oil). To explain this fact, we first presented the mechanism of stress relaxation at the debris dent edge [1]. According to test…
© 2015 ASHRAE (www.ashrae.org). Published in ASHRAE Transactions, Volume 121, Part 2. For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAE's prior written permission.
Single crystals of (Mn 2.4 Cu 0.6 )TeO 6 (I), Ba 2 MnTeO 6 (II) and Pb(Mn 0.5 Te 0.5 )O 3 (III) have been prepared by crystallization from fluxes. X-ray investigations led to rhombohedric symmetry (I): R3̄, (II): R3̄m with the trigonal lattice constants (I): a = 8.826(1), c = 10.687(2) Å, Z = 2. (II): a = 5.817(8), c…
(1) 切込みや逃げ面接触長さを変化させることにより, 切屑, 被削材, 工具への切削熱の流入割合を求めることができた.(2) 切削熱の切屑への流入割合は, 切削速度の上昇とともに増加し, 被削材, 工具へは減少していく.(3) 高速切削になるにつれて, 逃げ面での摩擦による発熱は無視できなくなる.
The effect of alkali metals added to Cu ion-exchanged Y-type (Cu-NaY) zeolite catalysts on the oxidation activity and the selectivity is investigated using the gas-phase catalytic oxidation of benzyl alcohol as a model reaction. The added alkali metals such as K have been found to promote significantly the catalytic o…
Explosive shock compression of poly(methineimine) produced a large portion of amorphous graphitic carbon nitride of composition CN 0.2 and small amounts of diamond-like carbon containing a slight amount of nitrogen. Codeposition of the two materials suggests the possibility of cubic phase transformation of heterocycli…