U.S.-Egypt Cooperative Research : Synthesis and Sintering of TiC Based Ceramic Matrix Composites for Structural Applications

0612063 Bordia描述：该项目支持华盛顿西雅图市华盛顿大学材料科学与工程系Rajendra Bordia博士和Zaki I博士的合作研究。Mohamed，埃及赫勒万中央冶金研究与发展学院（CMRDI）。 他们计划研究用于结构应用的TiC基陶瓷基复合材料的合成和烧结。为了应对更高的切削速度、更高的公差和更长的刀具寿命的挑战，需要生产具有更高硬度、耐磨性和断裂韧性的定制显微组织。这就需要进一步发展加工技术，包括非常规的加工方法，需要精确的知识和控制的合成和烧结过程，以避免试样变形，开裂和高应力水平，由于烧结速度的差异，性能变化和温度的不均匀性。知识优势：陶瓷基复合材料（CMC）与韧性粘结剂和没有特别感兴趣的行业。这类材料的性能取决于其性能，而性能又取决于其组成和微观结构。PI将研究合成高密度TiC及其与其他材料（Al 2 O3，ZrO 2）的复合材料的可能性，并使用和不使用韧性粘合剂（Fe，Ni，Co），以改善其机械性能。自蔓延高温合成（SHS）结合外加载荷的应用将被用于这些材料的制备。使用该技术的优点是能够同时在一个步骤中进行合成和烧结。将研究控制最终物体的物理和机械性能的不同工艺参数。这两个小组拥有互补的专门知识和资源，将使我们能够解决这一问题。埃及团队将专注于合成具有和不具有韧性粘合剂的TiC基CMC材料。将研究不同参数控制合成过程的效果。美国团队将专注于埃及开发的材料的微观结构和机械特性。系统研究了成分和显微组织对相关力学性能的影响。更广泛的影响：该项目可以改进TiC复合材料的切削和钻孔工具，这些工具需要更有效，允许更高的切削速度，更高的公差和更长的工具寿命。该项目将启动一个新的国际合作，并将为初级和高级研究人员提供在独特的国际合作环境中工作的机会。 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。

0612063BordiaDescription: This project supports collaborative research by Dr. Rajendra Bordia, Department of Materials Science and Engineering, University of Washington, Seattle, Washington and Dr. Zaki I. Mohamed, Central Metallurgical Research and Development Institute (CMRDI), Helwan, Egypt. They plan to study the synthesis and sintering of TiC-based ceramic matrix composites for structural applications. Meeting the challenges of higher cutting speeds, higher tolerances and longer tool life requires the production of tailored microstructure with improved hardness, wear resistance and fracture toughness. This requires further developments in the processing techniques including unconventional processing methods requires a precise knowledge and control of the synthesis and sintering processes to avoid specimen distortion, cracking and high stress level due to sintering rates difference, properties variations and temperature non- uniformity.Intellectual Merit: Ceramic matrix composites (CMC) with and without ductile binder are of special interest to industry. The performance of such materials depends on their properties, which in turn depends on the composition and microstructure. The PIs will study the possibility of synthesis of highly dense TiC and its composites with other materials (Al2O3, ZrO2) with and without ductile binder (Fe, Ni, Co,) in an effort to improve their mechanical properties. Self-propagating high temperature synthesis (SHS) combined with application of external load will be used in the fabrication of these materials. The advantage of using this technique is the ability of performing synthesis and sintering at the same time and in one step. The different processing parameters controlling the physical and mechanical properties of the final object will be investigated. The two teams have complementary expertise and resources that will make it possible to address this problem. The Egyptian team will focus on the synthesis of the TiC-based CMCs materials with and without ductile binder. The effect of different parameters controlling the synthesis process will be studied. The US team will focus on the microstructural and mechanical characterization of the materials developed in Egypt. A systematic investigation of the effect of the composition and microstructure on relevant mechanical properties will be conducted. Broader Impact: The project can lead to improvements in cutting and drilling tools from TiC composites which are needed to be more effective, allow higher cutting speeds, higher tolerances and longer tool life. This project will initiate a new international collaboration and will provide both junior and senior researchers an opportunity to work in a unique international collaborative environment. 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.