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。
Single crystals of isotactic poly-4-methyl pentene-1 were prepared from solution. The crystals were mostly flat squares with more or leas regular shapes. They consisted of thin square layers forming spiral terraces centred on screw dislocations. The molecules were found to be perpendicular to these layers. The same po…
In commercial practice, where temperatures are low, a number of commercially available materials are satisfactory as a container for molten aluminum. None of these, however, resists attack by aluminum in the temperature range 1800° to 2000°C. An investigation was conducted to find a material completely inert to alumin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAdsorption of Fluorinated Methanes by Linde Molecular SievesPeter CannonCite this: J. Phys. Chem. 1959, 63, 2, 160–165Publication Date (Print):February 1, 1959Publication History Published online1 May 2002Published inissue 1 February 1959https://pubs.acs.org/doi/10.1021/j150…
Fourteen selected metal ions were added to magnesium basic carbonate, and the MgO obtained after calcining was fired at various temperatures to determine the effect of the additives on the sintering behavior. The magnesia without additives showed rapid increase in density with firing temperature near 1200° C. The majo…
The carbon atom positions in uranium carbides have been determined from neutron diffraction data. UC is face-centered cubic with sodium chloride structure. U/sub 2C/sub 3/ is body-centered cubic with space group 14 bar 3d, and carbon atoms have one parameter of 0.295 with carboncarbon bond distance of 1.295 A. UC/sub…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThiolcarbamates. Preparation and Molar Refractions1Harry TillesCite this: J. Am. Chem. Soc. 1959, 81, 3, 714–727Publication Date (Print):February 1, 1959Publication History Published online1 May 2002Published inissue 1 February 1959https://pubs.acs.org/doi/10.1021/ja01512a05…
The conditions influencing the onset of acoustically-induced cavitation in tap water have been investigated, with special attention to the effect of air-filled cavitation nuclei. Cavitation was induced by exciting an acoustic radial mode in the water in a spherical resonator at a frequency near 25 kc/sec. Air-filled n…
A series of detailed measurements have been made of the absorption spectrum of pure vacuum grown crystals of silicon in the wavelength range 2 μ to 30 μ, and over the temperature range 20°k to 365°k. Some new absorption bands have been found, and an explanation is offered for the positions and temperature dependence o…
Abstract Many articles have been written attempting to explain the degradation processes which take place when polyvinyl chloride is aged. Everyone agrees that hydrogen chloride is evolved, color develops, and the polymer eventually becomes stiff and insoluble as a result of crosslinking. Early workers believed that h…
Not available
Not available
Not available
Velocities of individual dislocations have been measured in LiF, covering a range of twelve orders of magnitude in velocity, from 10−7 cm/sec to 105 cm/sec. The velocity is extremely sensitive to applied stress at low velocities, and for each crystal there exists a minimum stress for dislocation motion, below which di…
An ultrasonic vibrational mode with rather well-defined properties has been set up in a cylindrical single crystal of sodium chloride. The saturation of the spin levels of ${\mathrm{Na}}^{23}$ and ${\mathrm{Cl}}^{35}$ by acoustically induced quadrupole transitions, $\ensuremath{\Delta}m=\ifmmode\pm\else\textpm\fi{}2$,…
The term “pickling” is applied to the removal from metals of scale and oxide coatings, usually resulting from heat-treatment, forging, or casting operations. The thickness, composition, and structure of the scale depend on the conditions under which it is formed. The temperature and duration of heating and the nature…
Saburo Shimodaira：On the Relation between the Work Function and the Corrosion Rate of the Metals．The relation between the thermo-ionic work function
Van Wyk's theory on the compression of a fibrous mass is refuted by the authors on the ground that it ignores the substantial thickness of a fiber. The authors' formula, which shows the theoretical relation between the pressure and volume of a compressed specimen, explains the experimental tendency of the pressure-vol…
In the present study, X-ray and chemical analyses were carried out on carbides isolated electrolytically from several high-V high speed steels, and the effect of carbon, tungsten and vanadium contents on the constitution of carbides in these steels were discussed. Carbides in high-V high speed steel are MC, M6C and M2…
Lincoln County has yielded a variety of metals and minerals: gold, coal, iron, lead, copper, zinc, fluorite, bastnaesite, gypsum, and tungsten. In addition, deposits of molybdenum, thorium, uranium, and manganese are known, although no significant production has been recorded. The White Oaks district produced almost $…