Abstract
Titanium carbide has been identified as a candidate material for advanced coated nuclear fuel components, however little is known about the response of TiC to particle irradiation at elevated temperatures. To understand the radiation effects in TiC, proton irradiations were conducted to three doses (0.17, 0.34, and 0.80dpa) at three temperatures (600°C, 800°C, and 900°C), and post irradiation examination was performed with a number of TEM techniques to evaluate the irradiated microstructures.The predominant irradiation induced aggregate defects found by high resolution TEM and diffraction contrast TEM were interstitial Frank-type loops, while unfaulted loops were also identified. By monitoring the loop sizes and densities and accounting for the interstitials which formed the loops, a marked increase in vacancy point defect mobility was observed around 800°C.
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