Theoretical analysis of bubble nucleation in GASAR materials

来源期刊：中国有色金属学报(英文版)2003年第4期

论文作者：刘源 李言祥

文章页码：830 - 834

Key words：GASAR; porous metal; bubble nucleation

Abstract: Nucleation of gaseous hydrogen bubbles is the initial stage of GASAR process. Through the theoretical analysis, it has been identified that heterogeneous nucleation of bubbles as caps on the solid surfaces of impurities is impossible and only the heterogeneous nucleation in pits and cracks in impurities is the most feasible way in the GASAR process. The results also show that the probability of bubble nucleation progressively decreases from Al, Cu and Ni to Fe molten metal, which is the result of the increasing adhesion work of liquid metal on alumina.