Deuterium irradiation resistance and relevant mechanism in W–ZrC/Sc2O3 composites prepared by spark plasma sintering.

To study the D 2 retention behavior of W–ZrC/Sc 2 O 3 composites, mirror-polished samples prepared by spark plasma sintering (SPS) were exposed to different irradiation doses at room temperature (RT). TDS measurements were subsequently performed from RT to 900 K. Results revealed that Sc 2 O 3 particles did not benefit the D 2 + ion irradiation resistance, whereas W–1vol% ZrC/2 vol% Sc 2 O 3 composites showed superior irradiation resistance over other samples. D 2 implantation was also performed at 523 K with the irradiation dose of 1 × 1020 D 2 +/m2 to study the influence of temperature on D 2 retention during the capture process, which could apparently decrease D 2 retention by low-energy traps. Only small dislocation loops or precipitates were observed in W–1vol% ZrC/2 vol% Sc 2 O 3 sample after irradiation up to 1.0✕1021 D 2 +/m2. • The effect of ZrC/Sc 2 O 3 doping on irradiation resistance behavior of W materials was investigated. • 1 vol% ZrC/2 vol% Sc 2 O 3 composite possess better irradiation resistance than SPS/W. • Increasing implantation temperature decrease D 2 retention by low-energy traps. [ABSTRACT FROM AUTHOR]