High-temperature reactive melt spreading: Experimental modeling of SHS reactions

摘要

Initial stages of high-temperature spreading and inreaction of molten droplets with solid substrates were experimentally investigated in the systems Ti-C and Nb-B.Thin layer of solid product(carbide, boride)crystalline grains forms immediately in the spreading frontier, while the melt infiltrates through nano-scale gaps between grains.The formation of a continuous layer of oxidation-and wear-resistant solid refractory(~ 3000°C)product can be utilized for coating protection of refractory metals and carbon materials, as well as in high-temperature joining of carbon materials via a thin layer of titanium carbide.