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 absorptions of pure and codoped germanium silicate preforms made by modified chemical vapor deposition (MCVD) have been studied from 170 to 400 nm. Three bands with maxima at 185, 242, and 325 nm have been observed. The shortest wavelength band is attributed to GeO(2), while the other bands are assigned to GeO. Th…
Rigorous conditions for the metamagnetic transitions between the paramagnetic and ferromagnetic states and between the weak ferromagnetic and normal ferromagnetic states are derived. The expressions for the conditions and the critical field are derived in the simple model for an itinerant electron system and for a com…
Constitution, microstructure, cooling–transformation (CT) diagrams, and corresponding diagrams for mechanical properties are summarized for the Cu–Al–X alloy types (X = Fe, Ni, Mn, Be, Co, Si, and Sn) with β-transformation. On the basis of the cooling time, it is possible to simulate the micro-structure and the proper…
Both the Meissner-signal (flux expulsion on cooling through Tc) and the shielding signal (obtained by turning on a field in the superconducting state) have been observed in deuterated single crystals for fields oriented both along and normal to the chain axis. A possible isotope effect on Tc is discussed. We find comp…
Abstract
It has been found that Stenhouse salts show reverse photochromism.
Deformation modes of quenched β Ti–16∼27%V alloys are investigated in compressive and tensile tests as a function of crystallographic orientation and deformation temperature. The {332} twinning takes place in the low vanadium content alloys. By analysing the twinning systems appearing in compressive and tensile tests,…
An investigation of diffusivity and solubility of hydrogen in both annealed and as-cold-rolled specimens of an austenitic Type 304 steel has been carried out at room temperature by means of an electrochemical permeation method. Especially, the effect of formation of the “foreign phases”, such as hydride phases (γH, εH…
Abstract The effect of lime on the effective cation exchange capacity (ECEC) and exchangeable cations of 18 New Zealand topsoils was measured. Liming increased ECEC on all soils and the change in ECEC per unit change in pH followed the order yellow‐brown loams > northern and southern yellow‐brown earths > centra…
The rate of formation of tarnish films on silver coupons by vapors generated from organic sulfur compounds, especially dimethyldisulfide, has been measured at room temperature at both high and low relative humidity. The results for freshly cleaned silver coupons, as determined by cathodic reduction methods, indicate t…
The FCC to FCT transformation in Mn–22 at% Cu and –26 at% Cu alloys has been examined by means of X-ray diffraction and optical and electron microscopies with a cooling stage. The c parameter and the c⁄a ratio of the FCT martensite decrease with decreasing temperature, abruptly below the transformation temperature and…
The fatigue and fracture characteristics of polycrystalline Cu-Al-Ni shape memory alloys have been investigated by examining the effect of quenching condition on intergranular cracking, by tensile and fatigue testing and by observing fracture surfaces. The tensile and fatigue tests have been carried out for three defo…
Abstract
The single crystal X-ray analysis of [Au9{P(p-C6H4OMe)3}8]-(BF4)3; has provided the first example of a cluster compound with a metal atom incorporated into the centre of a puckered ring of like metal atoms.
The corrosion resistance of commercial austenitic alloys in the Fe-Cr-Ni-Mo system in marine environments has been reviewed. The types of corrosion examined include intergranular corrosion, stress-corrosion cracking, corrosion fatigue, pitting, crevice corrosion, galvanic corrosion, cavitation damage, and erosion-corr…
The composite structural material comprising paper and wood is analysed in terms of thermal softening and hygroplasticization with regard to its constituent polymers. In particular, an attempt is made to relate the softening occurring under dry conditions to that occurring under moist conditions. It is proposed that t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSteric effects in metal cluster compoundsD. M. P. MingosCite this: Inorg. Chem. 1982, 21, 1, 464–466Publication Date (Print):January 1, 1982Publication History Published online1 May 2002Published inissue 1 January 1982https://pubs.acs.org/doi/10.1021/ic00131a094https://doi.o…
The thermotropic liquid crystal mesophase formed by di-isobutylsilanediol has been known for over twenty-five years, but its nature and structure have remained uncertain and the physical characteristics of the phase appeared unique and quite different from those of any other recognised type of liquid crystal. In a pre…
Abstract
Research Article| July 01, 1982 Clay mineralogy of weathering rinds and possible implications concerning the sources of clay minerals in soils Steven M. Colman Steven M. Colman 1U.S. Geological Survey, Denver Federal Center, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar Geology (1…