[en] The plasma spraying technique was used to prepare oxide superconducting coating. By this method it is easy to make magnetic shielding devices with large area and complex shapes. The preparation, microstructure and diamagnetism of the coating materials were discussed in detail and a shielding device made by this method shows good shielding effects. (author). 5 refs., 5 figs

[en] The motion equation with an interaction force between flux and applied H is established and resolved for moving flux in the process of magnetization of type II superconductors. The expressions of energy dissipation and the dynamic pinning force exerted on the moving flux can therefore be acquired when the low frequency internal friction, modulus and magnetization curve are measured simultaneously in the process of magnetization with a variety of applied magnetization rate H. (author). 16 refs

[en] Crystals grown from Bi-Sr-Ca-Cu-O system may have different contents of Sr and Ca when varying the ratio of Sr/Ca in the starting composition. The Sr/ Ca ratio in crystals has important influence on the superconducting property of Bi-Sr-Ca-Cu-O crystal. The lattice parameter c increased from 30.60A to 30.01A and Tc(zero) increased from 84K to 90K with the increasing of Sr/Ca ratio from 2:1 to 3:1 accordingly. This result has shown its importance for understanding high-Tc superconducting phenomenon in Bi-Sr-Ca-Cu-O system further. (author). 5 refs., 3 figs., 1 tab

[en] This volume is one of a five-volume proceedings of the Chinese Materials Research Society International '90 Conference. The five-volume set provides a comprehensive review on the actual trends in basic and applied materials science research in China, as well as its consequences for both industry and society. The development of High-Tc superconductor materials includes its broad application in high speed electronics. Understanding and controlling of crystal growth processes present a major challenge to materials scientists. Optoelectronic materials, functional crystals, devices and processing technology are becoming of increasing importance, and the implications of these new technologies are destined to play a mayor role in future research

[en] Resonance Ionization Spectroscopy (RIS) is a photophysics process in which lasers are used to excite and ionize atoms of selected atomic number Z. With commercially available lasers ultrasensitive and ultraselective detection of elemental substances can be realized. As an analysis technique RIS found many applications in various fields including materials science. After a brief description on RIS, the experimental results about RIS analysis of Au and Ru were presented. Detection limits at sub-ppb level have been obtained by autoionizing state approach. (author). 5 refs., 9 figs

[en] Superconducting fibers of Bi(Pb)-Sr-Ca-Cu-O high Tc superconducting materials have been prepared by means of the laser-heated pedestal growth (LHPG) method. The highest zero resistance temperature T_c0 reaches is 114K, and the highest critical current density J_c (77K, O T) is greater than 5000 A/cm². As-grown superconducting fibers were successfully fabricated without post growth heat treatment. Amorphous materials were used for the first time to make high quality fibers. The influence of growth conditions, thermal treatment and the composition of the fibers were discussed. (author). 5 refs., 7 figs., 3 tabs

[en] The first ordered intermetallic compound was identified in Russia in 1916, although the concept of long-range order was only clarified by X-ray diffraction, in Sweden, ten years later. Initially, such materials were studied only by chemists trying to understand the basis of combination between metals. Also metallurgists began to be interested in their properties, first magnetic properties and later mechanical properties. The first conference on such compounds, concerned with mechanical properties, was not held until 1960. Now, there are apt to be several conferences devoted to intermetallics in any one year. This paper outlines some of the generalizations which can be made about the variation of the strength and ductility of intermetallic compounds as a function of temperature, with a sideways glance at the behaviour of such alloys when they are plastically annealed (those that are capable of this) and then annealed. The role of varying degrees of long-range ordered is emphasized. More recently, the beneficial effect of combining a 'monolithic' intermetallic phase with another to form an intimate two-phase structure has been established, and this will be exemplified. Finally, future aspects are considered. (author). 67 refs

[en] The low-frequency internal friction in the magnetization process is measured as a function of applied field H for (Pb_0.2Bi_0.8)SrCaCu₂O_x at a temperature below Tc. An internal friction peak is found at H 45x10^-4T and is concluded to associate with the moving flux. A new method of investigating the dynamics and the pinning mechanism of flux in high-Tc superconductor is discussed. (author). 9 refs., 6 figs

[en] Recent advances of focused ion beam technology in Japan is reviewed. Various focused ion beam systems which generate fine focused ion beams at energies ranging from 100 eV up to 200 keV have been developed, and various maskless processing techniques have been developed. Present FIB technology finds interesting applications in local modification such as circuit testing and modification in addition to various maskless processing. (author). 26 figs., 10 figs., 1 tab

[en] The so-called 'cold nuclear fusion' is a phenomenon that is considered to be nuclear fusion around room temperature. This was observed in electro-lysis of heavy water containing some impurities, and was first reported by 2 groups of researchers almost simultaneously in March 1989. Fusion rates reported before are too high to be explained by conventional nuclear reaction theory. It is generally accepted that some additional factors, which are not yet clear, must be considered. Author considers that material aspects, especially lattice defects aspects of cathode materials, as above mentioned additional factors, are important, and he proposes to consider interstitial deuterium dynamic crowdions and multi-deuterium atoms trapped at vacancies. (author). 12 refs., 5 figs