Abstract: Disclosed is an elementally mixed Al—Cu—Zn base powder blend for a sintered Al base alloy. The powder blend includes more than 5.6 wt % and less than 9 wt % Cu, 1˜5 wt % Zn, and a balance Al. With the powder blend, an article of a sintered Al base alloy having higher wear resistance as well as higher tensile strength can be fabricated.

Abstract: Disclosed is an Ni-plated layer of biaxial texture, which is formed by electroplating. In the Ni-plated layer,peaks measured on a &thgr;-rocking curve have a FWHM of 7° or less in terms of the misorientation on the c-axis; and peaks measured on &phgr;-scan have a FWHM of 21° or less in terms of the misorientation on the plane formed by the a-axis and the b-axis. Also, a process of electroplating a Ni layer are disclosed. The process comprises forming a Ni-plated layer of biaxial texture under a magnetic field by electroplating and subjecting the Ni-plated layer to thermal treatment to develop the biaxial texture. This electroplating process is expected to give a significant contribution to the development of the electroplating technology and to replace the vacuum deposition used for the preparation of thin film magnetic materials or thin film piezoelectric materials.

Abstract: A process for producing Bi-2223 high Tc superconductor in which fine MgO particles (<0.1 &mgr;m) are homogeneously distributed to provide flux pinning centers in Bi-2223 high Tc superconductor in order to give enhanced critical current density under magnetic field, as compared to the Bi-2223 high Tc superconductor without MgO dispersion, when processed under similar conditions. The process comprises mixing partially converted Bi-2223 powder and MgO fine particles, drying to give mixed powder, filling in silver tube, drawing, rolling and heat-treating at a temperature and for a time sufficient to form Bi-2223 high Tc superconductor in which fine MgO particles are homogeneously distributed.

Abstract: There is provided a process for producing titanium composite, comprising the steps of: molding titanium powder, titanium alloy powder, or powder comprising titanium into a certain shape by a cold isostatic press or cold press; reacting the shape with hydrocarbon gas at its decomposition temperature or higher, to form TiC therein; and providing the shape with high density by vacuum sintering, hot isostatic pressing, hot forging, hot rolling and/or the combinations thereof. TiC a reinforcing material, is in-situ formed by reacting a cold-pressed body of the powder with hydrocarbon gas and cleaner than the externally added one and distributed more uniformly and finely in the Ti matrix, leading to a significant improvement in wear resistance and high temperature property.