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

美国-埃及合作研究：用于结构应用的 TiC 基陶瓷基复合材料的合成和烧结

• 批准号: 0612063
• 负责人: Rajendra Bordia
• 金额: --
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-02-01 至 2011-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0612063&HistoricalAwards=false
• 关键词: U.S.; Egypt; Cooperative; Research; Synthesis

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.

0612063Bordia 描述：该项目支持华盛顿大学材料科学与工程系 Rajendra Bordia 博士和埃及赫勒万中央冶金研究与发展研究所 (CMRDI) 的 Zaki I. Mohamed 博士的合作研究。 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。为了应对更高切削速度、更高公差和更长刀具寿命的挑战，需要生产具有更高硬度、耐磨性和断裂韧性的定制微观结构。这需要加工技术的进一步发展，包括非常规加工方法，需要对合成和烧结过程进行精确的了解和控制，以避免由于烧结速率差异、性能变化和温度不均匀性而导致样品变形、开裂和高应力水平。 ：含或不含延性粘合剂的陶瓷基复合材料 (CMC) 受到工业界的特别关注。此类材料的性能取决于其性能，而性能又取决于其成分和微观结构。 PI 将研究合成高密度 TiC 及其与其他材料（Al2O3、ZrO2）、有或没有延性粘合剂（Fe、Ni、Co）的复合材料的可能性，以努力提高其机械性能。自蔓延高温合成（SHS）与外部负载的应用相结合将用于制造这些材料。使用这一技术的优点是能够同时一步进行合成和烧结。将研究控制最终物体的物理和机械性能的不同加工参数。这两个团队拥有互补的专业知识和资源，将有可能解决这个问题。埃及团队将专注于合成带有和不带有延性粘合剂的 TiC 基 CMC 材料。将研究控制合成过程的不同参数的影响。美国团队将重点研究埃及开发的材料的微观结构和机械特性。将系统地研究成分和微观结构对相关机械性能的影响。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-埃及联合基金计划的支持，该计划向两国的科学家和工程师提供赠款以开展这些合作活动。