| Abstract: | The purpose of present work is to investigate effects of fabricating temperature and ZrO2, SiC and NbSi2 addition on interfacial reaction layer and impact properties for Nb/MoSi2 laminate composites. Four types of laminate composites alternating four layers of Nb foil with each MoSi2, mixture layer containing ZrO2. SiC and NbSi2 particles were fabricated by hot pressing. The volume fraction of Nb foil involved in these system was nominally 10 vol%. It has been found that the impact value of Nb/MoSi2 laminate composites decreased at a fabricating temperature higher than 1523 K, since the thickness of reaction layer between Nb and MoSi2 increased along with fabricating temperature. However, the addition ofZrO2 particles to Nb/MoSi2 laminate composites fabricated at 1623 K resulted in a change of the interfacial microstructure as well as a reduction of the reaction layer. Nb/MoSi2-ZrO2 laminate composites maintained the same density as that of Nb/MoSi2 laminate composites fabricated at 1773 K and showed a higher impact value than that of Nb/MoSi2 laminate composites at 1523 K. |
