CAJ | 학술논문

采用吹气法制备工艺，研究了纯 Al 及亚共晶 Al-Si 合金基体对泡沫铝平均泡孔尺寸、相对密度，平均泡壁厚度等泡孔结构参数的影响。结果显示，亚共晶 Al-Si 合金基体泡沫铝较纯 Al 基体泡沫铝具备更佳的泡孔结构，并且平均泡孔尺寸更小，相对密度更低，平均泡壁厚度更薄。而 Si 含量不同的亚共晶 Al-Si 合金基体泡沫铝之间的差别较小，泡孔结构参数基本一致。分别从合金相图、熔体表面张力，熔体粘度、液膜破裂的平均厚度等角度分析了造成上述结果的原因。研究表明基体金属的种类也会对吹气法泡沫铝的产品质量产生显著影响，是生产中值得重视的一个因素。
채용취기법제비공예，연구료순 Al 급아공정 Al-Si 합금기체대포말려평균포공척촌、상대밀도，평균포벽후도등포공결구삼수적영향。결과현시，아공정 Al-Si 합금기체포말려교순 Al 기체포말려구비경가적포공결구，병차평균포공척촌경소，상대밀도경저，평균포벽후도경박。이 Si 함량불동적아공정 Al-Si 합금기체포말려지간적차별교소，포공결구삼수기본일치。분별종합금상도、용체표면장력，용체점도、액막파렬적평균후도등각도분석료조성상술결과적원인。연구표명기체금속적충류야회대취기법포말려적산품질양산생현저영향，시생산중치득중시적일개인소。
Using gas injection foaming process,the influences of pure Al and hypoeutectic Al-Si alloy base mate-rials on the average cell size,relative density,average cell wall thickness and other cell structure parameters of aluminum foams were studied.Compared with the aluminum foams produced from pure Al,the cell structures of the aluminum foams produced from hypoeutectic Al-Si alloy were much better,and the average cell size,rel-ative density and average cell wall thickness of aluminum foams produced from hypoeutectic Al-Si alloy was smaller,lower and thinner.While these cell structure parameters were similar between the aluminum foams produced from different hypoeutectic Al-Si alloys.In terms of alloy phase diagram,surface tension,melt viscos-ity and the average rupture thickness of liquid films,the related reasons causing the above results are analyzed. This study showed that the kind of base material was an important factor in aluminum foam production,since it would significantly affect the quality of aluminum foams.