U.S.-Egypt Cooperative Research: Direct (Gel) Casting of Piezoelectric Ceramic Parts

0513690SafariDescription：该项目支持罗格斯大学陶瓷和材料工程系Ahmad Safari博士和埃及赫尔万中央冶金研究开发研究所(CMRDI)Emad Ewais博士之间的合作研究。智能优点：该项目的目标是研究和实施直接(凝胶)铸造法作为制造压电陶瓷制品的成型技术。本研究采用胶体法制备了几种PZT陶瓷浆料，并对其进行了详细的研究。将通过流变学测量来研究在高固含量的水介质中制备浆液的可能性。将检查浆料的浇注和凝胶化。为了进行比较，还将使用热等静压(HIP)来生产相同的对象，以便对凝胶浇注的有效性进行基准测试。这项研究将考察将所提出的成形技术应用于制造全密度或接近全密度的复杂形状物体的可能性。将通过微观结构以及物理、机械、热和电性能的表征来评估产品的质量。这次调查的结果将被分析和报告。在这个项目中，这两个机构的专业知识将被整合，以开发适用于凝胶铸造的材料，并制造复杂的压电致动器。在过去的几年里，罗格斯大学的团队开发了各种压电传感器和致动器的加工和制造能力。埃及团队在为各种陶瓷开发泥浆方面拥有专业知识。两个团队的专业知识是相辅相成的，将使他们能够实现项目目标。更广泛的影响：拟议的计划是罗格斯大学和CMRDI之间的合作努力，允许美国和埃及团队之间交换想法和专业知识。这个项目需要一位博士后科学家的支持。它还为埃及合作伙伴提供了一个很好的机会，让他们更熟悉和发展压电材料和致动器领域的专业知识。研究工作的发现将在当地和国际会议上公布，并发表在陶瓷和铁电社区内传播信息。该项目得到了美国-埃及联合基金计划的支持，该计划为两国的科学家和工程师提供资助，以开展这些合作活动。

0513690SafariDescription: This project supports a collaborative research between Dr. Ahmad Safari, Department of Ceramics and Materials Engineering, Rutgers University and Dr. Emad Ewais, Central Metallurgical Research and Development Institute (CMRDI), Helwan, Egypt. Intellectual Merit: The goal of the project is to study and implement direct (gel) casting method as the forming technique for the fabrication of piezoelectric ceramic objects. In this study, several PZT ceramic slurries will be prepared via colloidal process and examined thoroughly. The possibility of preparing slurries in aqueous medium with high solid loading will be investigated using rheological measurements. Casting and gelation of the slurries will be examined. For comparison purposes, hot isostatic pressing (HIP) will also be used to produce the same objects in order to benchmark the effectiveness of the gel casting. This investigation will examine the possibility of applying the proposed forming technique to manufacture complex shape objects with full or near full density. The quality of the products will be evaluated through characterization of microstructure, and physical, mechanical, thermal and electrical properties. The results of this investigation will be analyzed and reported. In this program, the expertise of the two institutions will be integrated to develop suitable materials for gel casting and to fabricate complex piezoelectric actuators. In the past several years, the Rutgers team has developed processing and manufacturing capabilities for various piezoelectric sensors and actuators. The Egyptian team has expertise in developing slurries for various ceramics. The expertise of both teams iscomplementary and will enable them to reach the project objectives. Broader Impact: The proposed program is a collaborative effort between Rutgers and CMRDI and allows exchange of ideas and expertise between the American and Egyptian teams. This project involves support of a postdoctoral scientist. It also provides a good opportunity for the Egyptian partner to become more familiar with, and develop expertise in the field of piezoelectric materials and actuators. The finding of research work will be presented in local and international conferences and published to disseminate the information within the ceramics and ferroelectric communities. This project is being supported under the US-Egypt Joint Fund Program, which provides grants to scientists and engineers in both countries to carry out these cooperative activities.