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一种制作高阻抗背衬材料的新方法   总被引:2,自引:0,他引:2  
吴锦川  蔡恒辉 《声学技术》2008,27(2):214-216
文章分析了已有方法制作高阻抗背衬材料的不足,阐述了制作高性能背衬材料的新方法。新的高阻抗背衬材料,声衰减性能优异,材料的结合力高。该材料应用于制作2.8MHz窄脉冲探头,带宽达到120%以上。  相似文献   
2.
The adhesive fracture energy of a bond system consisting of a soft adhesive bonded to several elastomers has been evaluated over a wide range of temperature and rate. It was found that the shift factors used to superpose bond data at different temperatures displayed time-dependent features of both the adhesive interlayer and the elastomeric backing/substrate, indicating thermorheologically complex behavior. Individual contributions of the various bond components to the overall response of the joint have been quantitatively described in terms of their weight fractions and plateau moduli. Adhesive fracture energy mastercurves obtained by superposition of data exhibited two pronounced discontinuities. Both of these discontinuities corresponded to changes in adhesive failure mode and one was related to the rubber-to-glass transition of the adhesive. Previous researchers have described the magnitude of this later discontinuity in terms of the simple extension properties of the adhesive. In this work, it is shown that the discontinuity can be described by the thermorheologically complex behavior of the bond system as manifested by changes in the effective viscoelastic reference state.  相似文献   
3.
潘智文 《机械》2001,28(3):53-55
简述了涂覆磨具基材的材料,种类,应用场合,以及基材的编织方式,柔性转移。并重点介绍了最常用涂覆磨具砂带基材规格和接头等方面的问题。  相似文献   
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