Self-protective Oxidation-resistant Carbon Matrix Materials

1.研究背景。作为高温结构材料的碳素材料，即使在2500℃的高温下，也可以在惰性气氛中使用。因此，碳是一种有望作为航空航天关系材料、核反应堆和核聚变反应堆材料的材料。然而，碳材料在高温氧化气氛下存在氧化磨损的缺陷。因此，提高碳材料的抗氧化性的研究受到了世界各国研究者的广泛关注。很少有报道讨论材料的抗氧化系统在意外破坏时的自愈性。认为在本课题组中，研制高可靠性的高温结构材料是必要的。研究行动计划。为了共同开发具有抗氧化特性的碳基材料，我们，先进的M…长崎大学物质实验室组。和中科院先进碳材料课题组。金属研究所将碳化硼和碳化硅添加到碳基质中。具体地说，制备了两组分组成不同的碳基材料，考察了材料和陶瓷添加剂对抗氧化性能的影响，阐明了抗氧化机理。之后，我们还进行了材料设计，开发了合作中具有自修复功能的碳基材料。研究成果。结果表明，制备了两国成分不同的碳基材料，并对每种复合材料在干燥气氛下的氧化特性等物理性能进行了评价，通过氧化后形成表面氧化保护膜分散陶瓷颗粒的碳/陶瓷复合材料，表现出优异的抗氧化性能，并阐明了其表达机理。其次，研制出了这种材料设计的复合材料，并成功地研制出了具有优异抗氧化性能和力学性能的碳基材料，并明确了其具有自愈合性能。较少

1 . The research background. The carbon material used as high temperature structural material can be used even in 2500'C high temperature under the inert atmosphere. Therefor carbon is a material expected as aero space relation material, nuclear reactor and material for nuclear fusion reactor. However, the carbon material has the defect which wears out under the high-temperature oxidizability atmosphere by the oxidation. Therefore, the research in which the oxidation resistance to carbon material is improved is carried out by many researchers in the world. There is seldom the report which discussed the self-healing property when oxidation resistance system of the material was damaged by accident. It is considered that in this study group, research and development of the high temperature structural material with the high reliability are necessary.2. The research operation plan. In order to develop carbon base material with the oxidation resistance characteristics jointly, we, Advanced M … More aterial Laboratory group of Nagasaki Univ. and Advanced Carbon Material Research Group of the Chinese Academy of Science. Institute of Metal Research added boron carbide and silicon carbide to the carbon matrix. Concretely, the carbon base material of which the composition differs in both group is produced, and the material and ceramic additional effect on oxidation resistance is examined well-informed, and the oxidation-resistant mechanism is clarified. Afterwards, we also aimed at carrying out the material design, and developing carbon base material with the self-repair function in the cooperation.3. The research result. As the result that it produced the carbon base material of which the composition differs in both countries and evaluated physical property such as oxidation characteristics under the drying atmosphere on each composite material, carbon/ceramics composite material in which the ceramic particle dispersed by forming surface oxidation protective film after the oxidation, the excellent oxidation resistance was manifested, and it clarified the expression mechanism. Next, this composite material of material design was produced, and it succeeded in the development of the carbon base material which is excellent in oxidation resistance and mechanical property, and it was clarified to have the self-healing property. Less