以TiH2为发泡剂,采用熔体发泡工艺制备泡沫铝.研究了TiH2和Mg添加量对铝熔体发泡效果的影响,并对泡沫铝试样的孔隙率和孔径进行测定.采用体视显微镜、扫描电子显微镜(SEM)和X射线衍射(XRD)对泡沫铝进行了宏微观形貌观察和物相分析.利用电子万能试验机对泡沫铝的压缩性能进行测试.结果表明,Mg能显著提高熔体发泡法制备泡沫铝的发泡效率和试样孔隙率,最终主要以Al3Mg2和MgAl2O4等形式存在于泡沫铝中.当Mg和TiH2的添加量均为1.5％时,制备的泡沫铝孔径均匀,压缩性能良好,且有较好的吸能能力.%Foamed aluminum was prepared using TiH2 as foaming agent by the melt foaming process.The effect of the additions of TiH2 and Mg on the foaming effect of aluminum melt was studied.The porosity and pore size of the foamed aluminum were measured.The macro and micro morphology observation and the phase analysis of foamed aluminum were carried out by stereoscopic microscope and scanning electron microscope (SEM) and X ray diffraction (XRD).And the compressive properties of foamed aluminum were tested by universal mechanical tester.The results show that Mg can significantly increase the foaming efficiency and the porosity of foamed aluminum prepared by melt foaming method.Finally,Mg mainly exists in foamed aluminum in the forms of A13Mg2 and MgAl2O4.When the amount of Mg and TiH2 are added to 1.5％,the foamed aluminum has uniform pore size,good compression performance and good energy absorption capacity.
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