Copper/Chromium/Zirconium alloy (Cu98.9/Cr1.0/Zr0.1) is a precipitation-hardened material engineered for applications requiring a combination of high electrical conductivity, strength, and thermal stability. Its unique microstructural control and mechanical endurance make it a preferred choice in high-performance electrical and thermal systems.
Material Overview
This alloy consists primarily of copper (98.9 %), with minor additions of chromium (1.0 %) and zirconium (0.1 %) that promote fine precipitation hardening. The alloy develops its strength through controlled heat treatment—typically solution treatment at 900–1000 °C followed by aging at 450–500 °C—which yields a dense dispersion of Cr- and Zr-rich precipitates within a copper matrix (Qin et al., 2014; Zhou, 2008). These nano-sized particles impede dislocation movement, providing tensile strengths exceeding 500 MPa while maintaining electrical conductivity above 80 % IACS (Shangina et al., 2017). The resulting microstructure features ultra-fine grains and stable dispersoids that remain effective even under prolonged thermal exposure.
Applications and Advantages
Cu–Cr–Zr alloys are widely used in resistance welding electrodes, heat exchangers, and fusion reactor heat sinks where thermal management and mechanical integrity are crucial. Their excellent thermal conductivity ensures efficient heat dissipation, while high strength and fatigue resistance prevent deformation under cyclic loading (Pintsuk et al., 2010). Alloying with zirconium improves grain boundary stability, enhancing high-temperature performance and oxidation resistance (Likhatskyi, 2023). Additionally, advanced processing methods such as high-pressure torsion or thermomechanical treatments further refine the microstructure, achieving an optimal balance between electrical performance and structural resilience.
Goodfellow Availability
Goodfellow provides Cu98.9/Cr1.0/Zr0.1 alloy rods manufactured to high purity and precision standards. Ideal for thermal, electrical, and mechanical testing, these rods are available in customizable dimensions and suitable for both laboratory and industrial use.
Explore Copper/Chromium/Zirconium Cu98.9/Cr1.0/Zr0.1 and other advanced materials in Goodfellow’s online catalogue: Goodfellow product finder.
References
- Likhatskyi, R. F. (2023). Creation and processing of copper alloys doped with chromium, zirconium and vanadium. Metaloznavstvo ta obrobka metaliv, 4, 3–12. https://doi.org/10.15407/mom2023.04.003
- Pintsuk, G., Blumm, J., Hohenauer, W., & others. (2010). Interlaboratory test on thermophysical properties of the ITER grade heat sink material copper–chromium–zirconium. International Journal of Thermophysics, 31(10), 2087–2101. https://doi.org/10.1007/S10765-010-0857-Y
- Zhou, X. (2008). Effects of thermo-mechanical heat treatment processing on microstructure and properties of Cu–Cr–Zr alloy. The Chinese Journal of Nonferrous Metals, 18(5), 915–920.
- Shangina, D. V., Bochvar, N. R., Morozova, A., Belyakov, A., Kaibyshev, R., & Dobatkin, S. V. (2017). Effect of chromium and zirconium content on structure, strength and electrical conductivity of Cu–Cr–Zr alloys after high pressure torsion. Materials Letters, 196, 202–205. https://doi.org/10.1016/J.MATLET.2017.04.039
- Qin, Y. Q., Wu, Y., Huang, X. M., Wang, Y., Cui, J. W., Hong, Y., & Zheng, Y. C. (2014). Effect of heat treatment on conductivity of Cu–1.0Cr–0.12Zr alloy. Advanced Materials Research, 1061–1062, 7–12. https://doi.org/10.4028/WWW.SCIENTIFIC.NET/AMR.1061-1062.7