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采用燃烧反应合成的方法制备了多孔Al-Fe基吸声材料。通过扫描电镜及X射线衍射对样品进行了表征,并使用驻波管法测其吸声系数。实验结果表明:Al-Fe吸声材料的孔隙率及吸声系数随着添加造孔剂(NaCl或无水K2CO3)含量的增加而增大;造孔剂为无水NaCl的Al-Fe吸声材料,其吸声性能高于造孔剂为K2CO3的Al-Fe吸声材料;反应后样品中没有Al、Fe单质残留,完全形成了Al-Fe金属间化合物。超声清洗后NaCl、无水K2CO3均充分溶解。
Porous Al-Fe-based sound-absorbing materials were prepared by combustion synthesis. The samples were characterized by scanning electron microscopy and X-ray diffraction, and the sound absorption coefficient was measured by standing wave tube method. The experimental results show that the porosity and sound absorption coefficient of Al-Fe sound-absorbing material increase with the increase of the content of pore-forming agent (NaCl or anhydrous K2CO3); the pore-forming agent is Al-Fe absorbing sound of anhydrous NaCl Material, the sound absorption performance is higher than the pore-forming agent for the K2CO3 Al-Fe sound-absorbing material; after the reaction there is no Al, Fe elemental residual, completely formed Al-Fe intermetallic compounds. After ultrasonic cleaning NaCl, anhydrous K2CO3 are fully dissolved.