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Prototyping of radially oriented piezoelectric ceramic-polymer tube composites using fused deposition and lost mold processing techniques.

机译:使用熔融沉积和失模加工技术对径向取向的压电陶瓷-聚合物管复合材料进行原型制作。

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摘要

Piezoelectric tube composite hydrophones of 3-1, 3-2, and 2-2 connectivity were developed using Fused Deposition (FD) and lost mold processing (LMP). In this work, a new series of thermoplastic binder formulations, named the ECG series, were developed for the FD process. The ECG-9 formulation exhibits mechanical, thermal, and rheological properties suitable for the Fused Deposition of functional lead zirconate titanate ceramic devices. This binder consists of 100 parts (by weight) Vestoplast 408, 20 parts Escorez 2520, 15 parts Vestowax A-227, and 5 parts Indopol H-1500. Oleic acid, oleyl alcohol, stearic acid, and stearyl alcohol (in toluene) were tested for use as a dispersant in the PZT/ECG-9 system. It was found that stearic acid adsorbs the most onto PZT powder, adsorbing 8.1 mg/m2. Using stearic acid, solutions of increasing concentration (5.0--50.0 g/l) were measured for adsorption. It was found that 30.0 g/l is the minimum concentration necessary for optimum surface coverage. The surfactant-coated powder was compounded with ECG-9 binder to create a 54 vol.% mix. The mix was extruded using a single screw extrusion apparatus into continuous lengths (>30 m) of 1.78 mm diameter filament. Fused Deposition was used to create composite designs of 3-1, 3-2, and 2-2 connectivity. After sintering, samples exhibit a sintered density greater than 97%.;Sanders Prototyping (SPI) was used to manufacture molds for use with LMP techniques. Molds of 3-1, 3-2, and 2-2 connectivity were developed. The molds were infiltrated with a 55 vol.% aqueous based PZT slurry. The parts were subjected to a binder decomposition cycle, followed by sintering. Resultant samples were highly variable due to random macro-pores present in the samples after sintering.;The resultant preforms were embedded in epoxy, and polished to dimensions of 8.0 mm inside diameter (ID), 14.0 mm outside diameter (OD), and 10.0 mm length (l) the OD and l dimensions are accurate to +/--2%, while the ID is accurate to +/--5%. Samples were corona poled, and the electromechanical properties were evaluated. Dielectric constant (K), hydrostatic charge coefficients (dh), and radial displacements (ur) were measured. Of the seven composite types studied, the FD-based composites with 3-2 connectivity exhibited the highest average dh of 42.4 pCN. The same 3-2 composites exhibited the highest dhgh (FOM) of 140 fm2/N.
机译:使用熔融沉积(FD)和失模处理(LMP)开发了具有3-1、3-2和2-2连接性的压电管复合水听器。在这项工作中,为FD工艺开发了一系列新的热塑性粘合剂配方,称为ECG系列。 ECG-9配方具有机械,热和流变特性,适用于熔融沉积功能性锆钛酸铅钛酸盐陶瓷器件。该粘合剂由100份(按重量计)Vestoplast 408、20份Escorez 2520、15份Vestowax A-227和5份Indopol H-1500组成。测试了油酸,油醇,硬脂酸和硬脂醇(在甲苯中)在PZT / ECG-9系统中用作分散剂。结果发现,硬脂酸在PZT粉末上的吸附最多,吸附量为8.1 mg / m2。使用硬脂酸,测量浓度增加的溶液(5.0--50.0 g / l)的吸附。发现30.0 g / l是最佳表面覆盖率所需的最低浓度。将表面活性剂涂覆的粉末与ECG-9粘合剂混合,以形成54%(体积)的混合物。使用单螺杆挤出设备将混合物挤出成连续长度(> 30 m)的直径为1.78 mm的长丝。熔融沉积用于创建3-1、3-2和2-2连接的复合设计。烧结后,样品的烧结密度大于97%。;桑德斯原型(SPI)用于制造用于LMP技术的模具。开发了3-1、3-2和2-2连接的模具。用55体积%的水基PZT浆料浸入模具。对零件进行粘合剂分解循环,然后进行烧结。由于烧结后样品中存在随机大孔,因此所得样品的变化很大。;将所得预成型坯嵌入环氧树脂中,并抛光至内径(ID)8.0毫米,外径(OD)14.0毫米和10.0毫米的尺寸长度(l)的OD和l尺寸精确到+ /-2%,而ID精确到+ /-5%。将样品电晕极化,并评估其机电性能。测量了介电常数(K),静水电荷系数(dh)和径向位移(ur)。在研究的七种复合材料类型中,具有3-2连接性的基于FD的复合材料表现出最高的平均dh(42.4 pCN)。相同的3-2复合材料表现出140 fm2 / N的最高dhgh(FOM)。

著录项

  • 作者

    McNulty, Thomas Francis.;

  • 作者单位

    Rutgers The State University of New Jersey - New Brunswick.;

  • 授予单位 Rutgers The State University of New Jersey - New Brunswick.;
  • 学科 Applied Mechanics.;Engineering Materials Science.
  • 学位 Ph.D.
  • 年度 1999
  • 页码 227 p.
  • 总页数 227
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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