{'fraction_non_alphanumeric': 0.024597116200169637, 'fraction_numerical': 0.027989821882951654, 'mean_word_length': 4.9296482412060305, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Elevated temperature properties of SiC-fibre reinforced CuCr1Zr, a candidate heat sink material for application in fusion reactors

In experimental fusion reactors the copper alloy CuCr1Zr is a widely used alloy for heat sinks. The thermal conductivity at room temperature of this alloy measures 370 W m−1K−1. Its room temperature mechanical properties with a tensile strength of 400–470 MPa and a yield stress of 280–380 MPa are based on a dispersion hardening and an aging treatment. The long-term temperature capability is however limited due to an overaging effect taking place in the temperature range of roughly 350 °C up to an aging temperature of 480 °C. A possibile way to improve the properties at elevated temperatures is by embedding stiff, strong fibres, e.g. SiC-fibres. In the present study, the mechanical behaviour of SiC-fibre reinforced CuCr1Zr is determined at 550 °C and compared with the room temperature properties. The thermal conductivity is considerably reduced by embedding SiC-fibres. From measured values of the thermal conductivity of the composite material the axial thermal conductivity of the SiC-fibre can be roughly estimated to be 16 W m−1K−1.