金属诱发高效浸渗原位合成混杂增强镁基复合材料研究

项目名称： 金属诱发高效浸渗原位合成混杂增强镁基复合材料研究

项目编号： No.51271051

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 陈礼清

作者单位： 东北大学

项目金额： 77万元

中文摘要： 针对轻质高抗磨镁基复合材料的需求及制备技术的困难，提出利用高熔点不互溶金属诱发镁熔体实现高效自发浸渗新思路，结合原位放热反应合成陶瓷增强相的优势，从热力学角度设计原位反应条件并控制反应产物和混杂增强相形态，揭示(Ti+B4C)/Mg系原位反应机制和金属诱发高效无压浸渗机理及浸渗过程动力学规律，制备组织可控的(Ti+B4C)/Mg、(TiC+TiB2)/Mg和(B4C+TiC+TiB2)/Mg系高性能混杂增强镁基复合材料；测试研究多元混杂增强镁基复合材料相关性能，阐明其耐磨性及阻尼性能提高的机理与组织的相关性，为低成本轻质混杂增强金属基复合材料的制备和应用奠定理论和技术基础。解决金属诱发自发浸渗方法中与镁基复合材料组织设计和性能控制的若干基本问题，对于复合材料的设计和应用有重要科学意义，不仅丰富复合材料低成本制备领域的研究内容，而且对于充分利用镁资源获得结构与功能一体化高性能材料有促进作用。

中文关键词： 金属基复合材料；金属诱发浸渗；原位反应合成；混杂增强；润湿性

英文摘要： Considering the requirement for the light-weight high anti-abrasive magnesium matrix composites and preparation difficulty, a new route is proposed to synthesize hybrid reinforced magnesium matrix composites by using high melting point metal to induce fast infiltration of molten Mg and in situ exothermal reaction to synthesize ceramic reinforcements. On the basis of thermodynamic calculation, the reaction products and morphology of hybrid reinforcements can be designed and controlled. The mechanisms of in situ reaction and metal-induced infiltration process and infiltration dynamics can be explored. So, the hybrid reinforced magnesium matrix composites of (Ti+B4C)/Mg, (TiC+TiB2)/Mg and (B4C+TiC+TiB2)/Mg will be fabricated with contrllable microstructures. The related performances of the as-fabricated hybrid reinforced magnesium matrix composites will also be studied to elucidate the correlation of vibration-damping behavior with their microstuctures. This study will lay a theoretical and technological foundations for the preparation and application of low-cost and light-weight hybrid reinforced metal-matrix composites. Some fundamental problems to be solved regarding metal-induced infiltration process in microstructural design and property control of magnesium matrix composites have important scientific signific

英文关键词： metal-matrix composites；metal-induced infiltration；in situ reactive synthesis；hybrid reinforcement；wettability