Abstract:Boron carbide reinforced aluminum matrix composites are a new type of spent fuel storage frame materials for nuclear power plants, and accurate determination of carbon content is conducive to guiding the quality control of composites from the source. In this paper, the key parameters such as sample weighing, flux type, flux dosage and addition sequence are studied in detail, and the analysis method for determining the carbon content in boron carbide reinforced aluminum matrix composites by high-frequency induction combustion infrared absorption method is established by using standard sample calibration instruments, and the optimal working conditions are determined. The precision and recovery of the spiked samples were tested by this method, and it was proved that the method was feasible for the analysis of carbon content in boron carbide reinforced aluminum matrix composites. The precision (RSD, n=6) of the carbon determination results in the actual samples was 0.5%~1.3%, the average recovery rate was 95%-105%, the detection limit of the method was 0.0016%, and the limit of quantification was 0.0056%, which met the needs of rapid and accurate detection of carbon content in boron carbide reinforced aluminum matrix composites.