Method and system for controlling chemical reactions between superconductors and metals in superconducting cables

Patent metadata

Field	Value
Publication number	US-9496073-B2
Application number	US-201313855190-A
Country	US
Kind code	B2
Filing date	Apr 2, 2013
Priority date	Apr 2, 2013
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

A method, system, and apparatus for fabricating a high-strength Superconducting cable comprises pre-oxidizing at least one high-strength alloy wire, coating at least one Superconducting wire with a protective layer, and winding the high-strength alloy wire and the Superconducting wire to form a high-strength Superconducting cable.

First claim

What is claimed is:

1. A method comprising:
forming at least two protective layers around at least one high-strength alloy wire, said high strength alloy wire comprising a plurality of filaments embedded in an Ag matrix, wherein a first protective layer is an Al 2 O 3 passivation oxide layer and a second protective layer is a TiO 2 non-reactive oxide layer;
coating at least one Superconducting wire with a protective layer;
arranging said at least one high-strength alloy wire and said at least one Superconducting wire to form a high-strength Superconducting cable; and
treating said Superconducting cable with a heat treatment cycle.

2. The method of claim 1 wherein said at least one Superconducting wire comprises Bi-2212 round wire.

3. The method of claim 2 wherein said at least one high-strength alloy wire comprises FeCrAl.

4. The method of claim 3 wherein forming at least two protective layers around at least one high strength alloy wire further comprises:
pre-oxidizing and heat treating said high-strength alloy wire to form said first protective layer; and
coating said at least one high-strength alloy wire with 10 micrometer oxide to form said second protective layer.

5. The method of claim 1 wherein arranging said at least one high-strength alloy wire and said at least one Superconducting wire to form said high-strength Superconducting cable further comprises:
wrapping said at least one high-strength alloy wire and said at least one Superconducting wire into one of:
a 4+3 cable pack;
a 3+4 cable pack;
a cable-in-conduit cable; and
a Rutherford cable.

6. The method of claim 5 wherein arranging said at least one high-strength alloy wire and said at least one Superconducting wire to form said high-strength Superconducting cable further comprises:
winding said Superconducting cable into a coil.

7. The method of claim 1 wherein treating said high-strength Superconducting cable with a heat treatment cycle further comprises;
raising a temperature to 820 degrees Celsius in 100% flowing O2 for two hours; and
raising said temperature from 820 degrees Celsius to a temperature of at least 891 degrees Celsius for 0.2 hours.

Assignees

• Shen Tengming
• Fermi Res Alliance Llc

Inventors

• Shen Tengming

Classifications

• H01B12/02

  characterised by their form · CPC title

• H01L39/143

  Electricity · mapped topic

• H01B12/10

  Multi-filaments embedded in normal conductors · CPC title

• H01B12/08 Primary

  Stranded or braided wires · CPC title

• Y02E40/641

  Cross-Sectional Technologies · mapped topic