Materials Literature
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Measurements have been carried out of the parallel and perpendicular magnetostriction of a polycrystalline equi-atomic FeRh alloy. Measurements were made in pulsed magnetic fields up to 15 T in the antiferromagnetic phase and at the antiferro-ferromagnetic transition induced by the field. The perpendicular antiferroma…
With new techniques of crystal growth new problems have been encountered with the platinum apparatus used in crystal production. Some of these difficulties are discussed in this paper, including attack by bismuth oxide, Bi 2 O 3 , and dissolution of the platinum in the leaching acids, together with methods of prolongi…
The use of hydrogen as a rocket fuel has been successfully established; however, it has also been established that many metals are degraded in one or more of their properties by environmental gaseous hydrogen. The degree of degradation may range from slight to extreme, depending on the metal being analyzed and the typ…
High-impulse current and voltage measurement in high-voltage technology and plasma physics is generally accompanied by high-level electromagnetic interference. This paper gives an analysis of various avenues of conducted and radiated interference entry showing that cable braid and cabinet currents represent major sour…
Single crystals of tin oxide (SnO 2 ) have been grown by a vapour-phase transport method and subsequently doped with terbium ions. The cathodoluminescence of these crystals has been measured at room temperature (300 K). The spectra comprise the intrinsic emission band of the host lattice and bands due to the presence…
Stress-induced acicular martensites in Cu-14.2Al-4.3Ni (wt%) alloy were investigated by means of transmission electron microscopy and selected area electron diffraction method. As a result acicular γ′ martensites were found beside numerous β1′ martensites reported previously, although the occurrence was quite rare. Th…
A number of high-spin iron(II) chelate complexes with some bidentate monoanionic ligands (β-diketonates, salicylaldehydate, and N-alkylsalicylideneiminates) and the quadridentate dianion NN′-ethylenebis(salicylideneiminate), and its analogues, has been studied by means of Mössbauer and electronic spectroscopy. In all…
The selective reflectance of S-cholesteryl 14-phenyltetradecanethioate was determined as a function of the wavelength and temperature at several constant values of temperature and wavelength respectively. The dependence of wavelength λp measured at maximum selective reflectance on temperature T could be curve fitted w…
A number of the Te-containing perovskites compounds have been studied. It has been established that some of them are either ferro-, ferri or antiferroelectrics. The influence of the different factors on the Curie temperatures is analysed. A tentative conclusion about the principal role of the Te6+-sublattice vis-a-via…
By the use of a quasi-static method the complex piezoelectric constant d22 of AgNa(NO2)2 has been measured over a temperature range -100°C ∼ 38°C and a frequency range 10 Hz ∼ 20 kHz. It was found that d22 shows a dispersion of Debye type, d22 =d∞ + (do - d∞)/(1 + iwr), where the relaxation time τ coincides with that…
I.r. and visible spectra identify the blue species in solutions of alkali polysulphides in dimethylformamide (DMF) as S3–. Elemental sulphur (S8) is reduced to S3– by secondary amines in hexamethylphosphoramide (HMPA). The reaction of piperidyl-lithium with S8 in HMPA has been investigated to determine the stoicheiome…
Abstract The structure and self‐assembly of collagen and procollagen molecules are reviewed. The registration peptides of procollagen have specific recognition properties which assure (1) selection of component polypeptide chains and (2) registration of their N‐termini, facilitating orderly folding into a collagen hel…
Article Equiatomic Ternary Phases in the Alloys of the Rare Earths with Indium and Nickel or Palladium was published on January 1, 1974 in the journal International Journal of Materials Research (volume 65, issue 1).
Flexural strengths, elastic moduli, and fracture energies of 3BaO·5SiO 2 glass‐ceramics with a variety of microstructures were determined. Flexural strength depends on the size of spherulites in the microstructure and on the amount of glassy phase remaining in the material. Higher strengths were achieved in glass‐cera…
セルロース繊維を濃厚AcOK水溶液で処理し,付着AcOKを洗浄除去後80℃で乾燥するとセルロースの(010)に相当する位置に新しい子午線干渉。が出現する。乾燥温度を高くするにしたがいIoは9.5Aの面間隔をもつ一次層線干渉Iiへ次第に変わっていく。これらの干渉は完全なセルロースの干渉のほかに付加的に出現するもので,処理によってセルロースの結晶化度はまったく変わっていない。したがって新干渉は非晶領域に生じたセルロースAcOK付加物によるものと考えられる。カリウムセルPtを酢酸で洗浄することにより,より完全なセルロース-AcOK付加物のX線図を得た。これから付加物の単位胞を求め,11は(110)に指数付けされた。非晶域に生成した付加物…
Since Coster-Kronig transitions for isolated atoms are often characterized by higher transition rates than other types of Auger emission, it is important to consider the quantitative effect of these transitions on the Auger electron spectroscopy of solid surfaces. We find that cross sections for the electron impact io…
A solid-state electrochemical cell with pellets of Ag 4 KI 5 as the electrolyte, silver foil as the anode and a mixture of I 2 and graphite as the cathode is described. This cell, Ag|Ag 4 KI 5 | I 2 +C, has an open circuit voltage OCV of 680 mV. Cell characteristics under different load conditions are reported. Polari…
It is shown that the presence of distinct SbIII and SbV atoms in the mixed-valency compound Cs2SbCl6 can be directly demonstrated by X-ray photoelectron spectroscopy. The surface purity of the material can be checked by supplementary studies using argon ion bombardment.
The coarsening of lamellar eutectic alloys is controlled by faults in the as-grown structure. A model, based on the use of In cosh cylinder co-ordinates, is proposed to calculate the rate of shrinkage of lamellar terminations. It is found that for high volume fractions and diffusion through the continuous phase around…
Specimens of an enameling steel were exposed at 57 sites of the National Air Sampling Network (NASN). Weight losses for one and two years of exposure at each site were determined. Available climatic data were collected and average relative humidities and average temperatures were calculated. Average levels of pollutan…