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在液体铝合金中有非金属氧化物,其中包括与溶解在熔体中的氢相互作用的Al_2O_3. 在文献中描述了两种类型的这种相互作用.大多数研究者都坚持一种概念,即在含有对氢呈活性反应的氧化物的熔体中,产生氧化物吸附氢的过程.当在气相——液熔体——氧化铝系中达到平衡时,这一过程即告结束.熔体含气量增大,其增加的数值等于吸附在氧化铝上的氢量.根据另一种假说,氧化铝吸附氢的作用仅是相互作用的第一阶段,即导致在氧化铝质点附近产生富氢的金属体积.根据文献作者的意见,下一阶段是在氧化铝质点上生成分子氢的气泡.此时,如果熔体的含氢量小于氢在98千帕下的溶解度,那就要生成具有表面负曲率半径的透镜形气泡(扁平的).根据计算,在铝熔体中氧化铝浓度为0.01%时,即有约0.1～0.
Among the liquid aluminum alloys are nonmetallic oxides, including Al 2 O 3 which interacts with hydrogen dissolved in the melt.Two types of this interaction are described in the literature.Most researchers have stuck to one concept, Ie in the melt containing an oxide that reacts with hydrogen, the process of adsorbing hydrogen by the oxide ends when the equilibrium is reached in the gas-liquid melt-alumina system. The volume of gas in the body increases and increases by an amount equal to the amount of hydrogen adsorbed on the alumina.According to another hypothesis, the role of alumina in adsorbing hydrogen is only the first stage of interaction, leading to the generation of rich near alumina particles Hydrogen metal volume. According to the authors of the literature, the next stage is the generation of bubbles of molecular hydrogen on the alumina particles, in which case if the melt has a hydrogen content less than the solubility of hydrogen at 98 kPa, Lens-shaped bubble with a negative radius of curvature of the surface (flat) Calculated to have a value of about 0.1-0 when the aluminum oxide concentration in the aluminum melt is 0.01%.