摘要:
Improvement in a method for producing a sintered elongated article by the steps comprising filling a metal pipe with a material powder, carrying out plastic deformation of the metal pipe and then subjecting the material powder in deformed metal pipe to sintering. In the invention, a netting of metallic wire (1) whose melting point is higher than a melting point of the material powder (3) is arranged around the metal pipe (2) before the sintering.
摘要:
An outer surface of a superconducting thin film of compound oxide such as YBa.sub.2 Cu.sub.3 O.sub.7-.delta. deposited on a substrate such as MgO and SrTiO.sub.3 is protected with a protective layer which is composed of polymer compound such as polyimide, silicon resin or epoxy resin.
摘要:
A process for producing a superconducting article having a layer of compound oxide of quasi-perovskite type oxide crystal structure by electrodeposition technique. The process is characterized by dispersing a material powder in a liquid containing a carrier, driving ionized material particles towards a substrate by applying a direct current between a substrate and a counter electrode, and then sintering a thin layer of powders deposited on the substrate to convert the deposited powders to a superconducting compound oxide.
摘要:
A thin film of a preselected compound having a large area is continuously produced on a substrate by depositing elements constituting the preselected compound from a target member onto the surface of a substrate by sputtering, comprising the steps of:rotating a first target member having a flat surface disposed around an axis which crosses the surface and comprising elements of the preselected compound so that a first part of the surface of target member is positioned at a first sputtering position and another part of the first target member is positioned at a second sputtering position,at the first position, sputtering at least one second target comprising at least one element of the preselected compound which is easily sputtered from the first target member so as to supply the deficient element to the first target member, andat the second position, sputtering the elements from the first target member so as to deposit them on the surface of said substrate while continuously supplying the substrate so that a part of the substrate is positioned in the path of the sputtered elements,whereby the elementary composition of the first target member at the second position is adjusted to the preselected composition.
摘要:
A sintered compact of cubic boron nitride is made by adsorbing and/or diffusing 0.005 to 1.000 percent by weight of water into a boron nitride compact containing alkaline earth metal boron nitride as a catalyst. The so prepared compact is then subjected to a treatment under high pressure at a relatively low temperature to form a dense cubic boron nitride sintered compact of high purity.
摘要:
A diamond sintered body for tools contains a diamond content in excess of 93 percent and not more than 99 percent by volume and a residue including at least one of a metal or a carbide selected from groups IVa, Va and VIa of the periodic table and an iron group metal of 0.1 to 3 percent by volume in total and pores at least 0.5 percent and not more than 7 percent by volume.