Study on hydrogen release mechanism of package shell

Abstract

In this paper, the hydrogen release amount of SiC particle reinforced aluminum matrix composite (SiCp/Al) base plate, titanium alloy enclosure and its packaging shell was studied, the influence of substrate surface morphology on the hydrogen storage state of the coating was analyzed, and the hydrogen release mechanism of the packaging shell was discussed. The results show that the gold-plated SiCp/Al composite is the main source of hydrogen release from the package shell, and its complex surface morphology leads to different hydrogen storage states of the coating. At the early stage of baking, the hydrogen storage release is mainly due to micropores and interface defects, which is the main reason for the large amount and dispersion of hydrogen release from the package shell. Continuous baking is mainly stable release of lattice hydrogen storage, resulting in stable and discrete release of hydrogen.