CEC/ICMC 2025 Abstracts & Technical Program

Session

M3Or2A - High Purity Aluminum for Low Temperature Conductor Applications

May 21, 2025, 11:15 AM

Naples 4/5

Conveners

M3Or2A - High Purity Aluminum for Low Temperature Conductor Applications

• Chris Kovacs (Scintillating Solutions LLC)
• Herman ten kate

500. M3Or2A-01: [Invited] The effects of monotonic and cyclic plastic strain at 4.2K on the electrical resistivity of bulk Al High Purity Aluminum”

Karl Hartwig

5/21/25, 11:15 AM

Invited Oral

The use of high purity aluminum (HPAL) for low temperature electrical conductor applications has been a subject of study for more than 50 years. The attractions include low density, very low electrical resistivity material at reasonable cost, and very low magneto-resistivity, all compared to those metrics for oxygen free high conductivity copper (OFHC Cu). The chief drawbacks to using Al are...

449. M3Or2A-02: Developing practical Cryogenic high purity aluminum (HPAL) conductor to enable high speed power density motors and generators.

Dr Xuan Peng

5/21/25, 11:45 AM

Contributed Oral

Cryogenic high purity aluminum (HPAL) conductor was originally developed and reported at the Air Force Research Laboratories in the 1980s. The basic idea was to exploit the potential to fabricate very high purity aluminum (5 or 6 ‘nines’ Al), which could achieve exceedingly low resistivity values in the 20 K and below temperature range. By using very high purity Al, the resistivity ratios...

369. M3Or2A-03: The Ultrafine Copper-Clad Super-High-Purity Aluminum Wires

Dr Akihiro Kikuchi (National Institute for Materials Science)

5/21/25, 12:00 PM

Contributed Oral

To achieve Net Zero CO2 Emissions by 2050, aircraft industries are conducting extensive studies for future aircraft using new technologies such as hydrogen aircraft and electric aircraft. Since those new aircraft should carry liquid Hydrogen, its cryogenic temperature of 20K could be expected to be used as a coolant for the efficient fan motor and generator. Super-high-purity aluminum is a...

438. M3Or2A-04: Investigating the impact of tensile stress-induced/annealing-affected dislocation and grain boundary on the performance of High Purity Aluminum Wire by EBSD.

Mr Yang Guo (The Ohio State University)

5/21/25, 12:15 PM

Contributed Oral

It is essential to develop lightweight cables with low AC loss in the application of electric aviation. High Purity Aluminum (HPAL), which operates effectively at cryogenic temperature, has been developed to compete with superconductors especially in higher frequencies. HPAL, characterized by 99.999% aluminum purity, achieves a residual resistivity ratio (RRR) up to 1000. It has minimum...

433. M3Or2A-05: Impact of anomalous magnetoresistance and cyclic deformation on RR values of HPAL composites at low temperatures

Mr Jin Kwon

5/21/25, 12:30 PM

Contributed Oral

High power-density motors are required to meet demand for increasing interest in aircraft electrification. To reach these requirements high current density and lightweight conductors are required in the motor windings. With liquid cryogen on-board, low temperatures (20 K with LH2) are achievable where very high purity normal metals benefit from resistance ratio (RR) values of up to 1000. This...