The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 17, 1990
Filed:
Feb. 24, 1989
Kiyoshi Inoue, Tsukuba, JP;
Takao Takeuchi, Tsukuba, JP;
Yasuo Iijima, Tsukuba, JP;
Michio Kosuge, Tsukuba, JP;
National Research Institute for Metals, Tokyo, JP;
Abstract
A long, linear composite article which is characterized in that a large number of composite filaments are present as spaced from one another in a continuous layer composed of copper, a copper alloy, niobium, tantalum or vanadium, each of said composite filaments having a structure that at least one strand of a linear body is surrounded by an aluminum alloy or niobium, said linear body being composed substantially of extremely fine, filamentary superconducting Nb.sub.3 Al compound having an average diameter of from about 0.03 .mu.m to about 1 .mu.m. The said composite article can be prepared by drawing a composite material composed of (a) an aluminum alloy and (b) niobium, together with copper or a copper alloy once or plural times repeatedly, until the average diameter of the aluminum alloy of (a) becomes about 1 .mu.m or less, and heat-treating the resultant linear composite material. This composite articles exhibit excellent superconducting characteristics in high-magnetic field and alternating-current magnetic field.