爆炸固结法制备MoSi_(2P)/Nb高温复合材料的开发研究

RESEARCH ON MoSi_(2P)/Nb HIGH-TEMPERATURE COMPOSITES BY EXPLOSIVE CONSOLIDATION TECHNOLOGY

采用爆炸固结法制备MoSi2P/Nb高温复合材料,并对其微观组织及力学性能进行研究。结果表明:爆炸固结法制备的MoSi2P/Nb复合材料有三种组织形貌,由外至里逐渐致密,心部能量汇聚产生熔化,出现铸态组织。随λ值的增加,MoSi2P/Nb复合材料的致密性增加,相对密度高达95.4%。同时,复合材料的压缩强度也随λ值的增加逐渐提高。研究表明:爆炸固结法可用于制备MoSi2P/Nb高温复合材料。

Explosive consolidation technology is employed to prepare MoSi2P/Nb hightemperature composites. The microstructure features and mechanical properties of MoSi2P/Nb composites were also studied. The results show that there are three kind of microstructure features in the composites and the compactness of the composites increase from outer layer to inner layer. Cores of the composites exhibit as cast feature because the energy massed to the central of the powders. With increasing λ values, the compactness of MoSi2P/Nb composites increases--the relative density can reach as high as 95.4 %. As a result, the compressive strength of the composites increases as λ increases. Based on the analysis, it is pointed out that the explosive consolidation technology can be used in the preparation of MoSi2P/Nb hightemperature composites.