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

0513690 SafariDescription：该项目支持罗格斯大学陶瓷与材料工程系Ahmad Safari博士和埃及赫勒万中央冶金研究与发展研究所（CMRDI）Emad Ewais博士之间的合作研究。 智力优势：本计画的目的是研究并实施直接凝胶注模法作为压电陶瓷物件的成型技术。在本研究中，我们将利用胶体法制备几种PZT陶瓷浆料，并进行详细的测试。将使用流变学测量研究在具有高固体含量的水性介质中制备浆料的可能性。将检查浆料的流延和凝胶化。为了比较的目的，热等静压（HIP）也将用于生产相同的对象，以基准的凝胶浇注的有效性。本研究将探讨应用所提出的成形技术来制造具有全密度或接近全密度的复杂形状物体的可能性。产品的质量将通过微观结构、物理、机械、热和电气性能的表征进行评估。将对调查结果进行分析和报告。在该计划中，这两个机构的专业知识将被整合，以开发适用于凝胶浇注的材料，并制造复杂的压电致动器。在过去的几年里，罗格斯大学的团队已经开发了各种压电传感器和执行器的加工和制造能力。埃及团队拥有开发各种陶瓷浆料的专业知识。两个团队的专业知识是互补的，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，并允许美国和埃及团队之间的想法和专业知识交流。该项目涉及一名博士后科学家的支持。这也为埃及合作伙伴提供了一个很好的机会，使其更加熟悉压电材料和致动器领域并发展其专业知识。研究结果将在本地和国际会议上发表，并在陶瓷和铁电社区内传播信息。 该项目得到了美国-埃及联合基金方案的支持，该方案向两国的科学家和工程师提供赠款，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.