Materials Literature
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Magnetic measurements, with particular emphasis on finite cylinders of iron in the form of whiskers, are interpreted with regard to magnetostatic effects. Demagnetizing fields are calculated using various degrees of approximation. In the cases considered the magnetostatic effects are dominant over other contributions…
A multiaxial theory of creep deformation for particle-strengthened metal-matrix composites is derived. This derivation is based on the observation that there are two major sources of creep resistance in such a system. The first, or metallurgical effect, arises from the increased difficulty of dislocation motion in the…
Abstract The mechanism of the thermal behaviour of Na‐magadiite at a temperature range from 293–573 K was developed based on X‐ray diffraction, DTA, DTL, Q‐TG, and gravimetric measurements. A structure model (B RANDT et al.) previously proposed was additionally used. It is possible to show that there probably is a con…
The effects of underrib configuration on the flashover voltage of contaminated HVDC (high-voltage direct-current) insulators are analyzed. Mathematical models are developed to characterize the behavior of multiple discharges sustained along a contaminated surface. The effectiveness of the insulator leakage length is i…
Polymeric blends of lignin with ethyl cellulose (EC) and cellulose acetate/butyrate (CAB) were prepared by solution casting from dioxane. Fracture surface analysis by scanning electron microscopy revealed phase separation when the lignin content exceeded 10% for blends with EC and 5% in the CAB system. While this phas…
The mechanical properties of fabric longitudinal extension and compression, shear and bending have an important influence on the performance of fabrics during tailoring and also on the performance of garments during use. Fabrics are overfed or underfed in tailoring during the sewing operations in such a way that longi…
Abstract Quantitative mineral analysis is necessary if highly accurate estimates of mineral types and proportions in a bulk rock are required to evaluate or predict the properties or behavior of that rock. In this chapter, “highly accurate” is defined as within 3% absolute or 10% relative (±10% of the amount of a give…
ABSTRACT A kinetic compensation effect was observed for acid‐catalyzed hydrolysis of a series of disaccharides. Twelve data sets for acid hydrolysis of three disaccharides reported in the literature were analyzed and compensation parameters were determined. The results are well described by following empirical compens…
Abstract This paper provides a summary of four EPRI‐sponsored contracts that studied the physico‐chemical characteristics and thermal and electrical behavior of unaged and service‐aged crosslinked polyethylene (XLPE)—insulated cables, and sections of the insulation obtained from this extruded cable. It has been demons…
The effect of quench rate in terms of the circumferential wheel speed and temperature of the melt when ejected on crystallographic orientation were studied for Nd-Fe-B melt-spun magnets. It was found that the temperature of the melt (T/sub m/) is the dominant parameter affecting the preferred orientation of the tetrag…
—The interfacial reactions of galvanized steel with a poly(vinyl chloride) adhesive formulated with epoxy resin and dicyandiamide have been studied using X-ray photoelectron spectroscopy (XPS). The dicyandiamide was observed to segregate partially to the adhesive/substrate interface. A small amount of amine hydrochlor…
Abstract New architectural graft copolymers were prepared, that is, the graft chains were situated in terminal or center position of the backbone chain. These graft copolymers were termed block‐graft copolymers. Two different block‐graft copolymers were prepared from a “grafting onto” process and a “grafting from” pro…
Isothermal oxidation tests of Zircaloy-4 have been performed in steam/argon mixtures at the temperatures of 1,000–1,490°C to study the oxidation behavior of fuel cladding under severe accident condition in LWRs. The change in mass increase of oxidized specimens was related to the concentration of steam in the atmosphe…
A condition for obtaining bistable states in a liquid-crystalline ferroelectric (S*C) has been found by computer simulation and analytical estimates; it depends on the value of the applied electric field, the magnitude of the polar contribution to anchoring energy and the material parameters of S*C
The work develops the general formalism to switch from a geometrically defined body-fixed frame, like the bisector frame, to the Eckart frame. The derived analytical formula for the axis-switching angle between the bisector and Eckart frames of an arbitrary ABC nonlinear molecule is used to parametrize the set of stan…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
The 76 CVE (cluster valence electron) species [PtIr4(CO)14]2- (l), obtained by the reductive carbonylation of a mixture of Na2PtC16 and IrC13.xH20 or Ir4(CO)12, is in equilibrium with the 72 CVE species [PtIr4(CO)12]2-(2) through the dissociation-association of two carbonyl ligands. Both anions were characterized by t…
The results of investigations into the cause of certain flashovers which occurred in horizontally mounted insulators in HVDC stations are described. Insulators having various shed shapes were subjected to contamination and wet tests under horizontally and vertically mounted insulators, a slight reduction was found in…
Abstract The need to consider CaCl + and MgCl + complexes in Ca‐Mg exchange reactions on montmorillonite was evaluated by examining cation selectivity in various anion backgrounds. The Ca‐Mg exchange isotherms on SWy‐1 Wyoming bentonite were determined in 0.0125 M SO 4 , 0.025, 0.050, and 0.100 M Cl and 0.03 M perchlo…
Photo-oxidation of unsaturated fatty acids or esters (LH = oleic acid, linoleic acid, methyl linoleate, and linolenic acid) by oxygen proceeds efficiently in the presence of a riboflavin derivative, riboflavin-2′,3′,4′,5′-tetra-acetate (Fl), in acetonitrile by a type II (singlet oxygen) mechanism with a limiting quant…