一种具有球形孔隙的高孔率泡沫钛合金

发布时间：2018-02-01 07:44

本文关键词： 金属材料多孔金属泡沫金属泡沫钛合金性能　出处：《材料研究学报》2015年05期 　论文类型：期刊论文

【摘要】：通过对粉体熔化发泡法的改进,制备了孔率高达90%的毫米级球孔泡沫钛合金。这种泡沫钛合金的压缩曲线包括弹性区、压缩平台区和"密实化"区等3个阶段。由于是脆性破坏,其中的压缩平台呈锯齿状。这种泡沫钛合金的压缩破坏是通过垂直于载荷方向的孔隙逐层坍塌破碎而不断推进的,"密实化"是碎块的不断堆积过程。孔壁上的微孔对该泡沫钛的吸声性能有利,未作任何处理的试样在1500-3000 Hz的声频范围内吸声系数最低为0.4左右,在3000-6300 Hz则吸声系数超过0.6,共振频率超过0.9。在较高声频段,这种泡沫钛试样的主要吸声机制为黏滞耗散。
[Abstract]:By improving the powder melting and foaming method, a millimeter foam titanium alloy with a high porosity of 90% mm was prepared. The compression curve of the foam titanium alloy includes the elastic zone. The compression platform area and the "compaction" zone are three stages, due to brittle failure. The compression platform is zigzag. The compression failure of the foam titanium alloy is continuously driven by the collapse of pores perpendicular to the loading direction. "compaction" is a process of continuous accumulation of fragments. The micropores in the pore wall are beneficial to the sound absorption of the foam titanium. In the range of 1500-3000 Hz, the sound absorption coefficient of the sample without any treatment is about 0.4, and the coefficient of sound absorption is more than 0.6 at 3000-6300 Hz. The resonance frequency is more than 0.9.The main sound absorption mechanism of the foam titanium sample is viscous dissipation at higher acoustic frequency.
【作者单位】：射线束技术与材料改性教育部重点实验室北京师范大学核科学与技术学院;
【基金】：北京市凝聚态物理重点学科共建项目XK100270454 北师大测试基金C14支持项目~~
【分类号】：TG146.23
【正文快照】： A Spherical-pore Foamed Titanium Alloy with High PorosityLIU Peisheng**QING Huaibin(Key Laboratory of Beam Technology and Material Modification of Ministry of Education,College of Nuclear Science and Technology,Beijing Normal University,Beijing 100875,Ch

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