Effect of current pulses on the resistivity of a cryogenic high-purity aluminum conductor
Abstract
This paper presents experimental data on the electrical resistance of high-purity aluminum conductors exposed to thermal cycling caused by pulsed heating at high current densities (about 10 exp 9 A/sq m) and cooling between pulses by liquid neon coolant (at about 27 K). A composite conductor consisting of high purity aluminum filaments in an Al-Fe-Ce matrix was used. The conductor was exposed to about 12,000 pulses of 10 ms duration and about 3000 pulses of 20 ms duration at a repetition rate of 1 pulse per second. The experiments showed no significant change in the dc resistance of the composite conductor as a result of the current pulses and the thermal cycling.
- Publication:
-
Advances in Cryogenic Engineering. Vol. 35B - Proceedings of the 1989 Cryogenic Engineering Conference
- Pub Date:
- 1990
- Bibcode:
- 1990ACGE...35.1661K
- Keywords:
-
- Cryogenic Cooling;
- Electric Conductors;
- Electric Pulses;
- Electrical Resistance;
- Metal Matrix Composites;
- Thermal Cycling Tests;
- Aluminum Alloys;
- Current Density;
- High Current;
- Liquid Neon;
- Pulse Heating;
- Electronics and Electrical Engineering