金属纤维多孔材料的吸声性能

发布时间：2018-04-01 10:03

  本文选题：金属纤维多孔材料　切入点：厚度　出处：《稀有金属材料与工程》2017年02期

【摘要】：采用松装、压制、定位3种烧结方式制备了厚度为1~30 mm的不锈钢纤维多孔材料,采用丹麦BK公司的双传声器阻抗管测试吸声系数,系统研究了孔隙度和丝径对吸声性能的影响规律。结果表明:在不同厚度条件下,孔隙度有着不同的最佳范围值,如1~3 mm时,孔隙度在80%~85%的范围内,5 mm时,孔隙度在85%~90%的范围内,10~15 mm时,孔隙度在90%~94%范围内全频吸声性能较好,随着厚度的增加,这个最佳范围值随之增大;在厚度≤mm时,材料的丝径越细,全频吸声性能越好;当厚度在3~20 mm的范围内时,随着厚度的增加,粗丝径样品的吸声性能逐渐变好,其吸声峰值向低频移动,并且保持着高频处较好的吸声性能;当厚度220 mm时,材料的丝径越粗,全频吸声性能越好。
[Abstract]:Stainless steel fiber porous material with thickness of 1 ~ 30 mm was prepared by three kinds of sintering methods, such as loose fitting, pressing and positioning. The acoustic absorption coefficient was measured with the impedance tube of double microphone of BK Company of Denmark. The effects of porosity and wire diameter on the sound absorption properties are systematically studied. The results show that the optimum range of porosity is different under different thickness conditions, for example, when the porosity is 1 ~ 3 mm, the porosity is in the range of 80 ~ 85% or 5 mm. When the porosity is 10 ~ 15 mm in the range of 85 ~ 90%, the full frequency sound absorption property is better in the range of 90% and 94%, and the optimum range increases with the increase of thickness, and when the thickness 鈮，

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