Multimodal cermet compositions and bimodal, and method for protecting a metal subjected to erosion superfu00eccie

摘要

Multimodal cermet compositions and bimodal, and method for protecting a metal superfu00eccie subjected to erosion. Multimodal cermet compositions comprise a multimodal distribution of grain of ceramic phase.The compositions include (a) a phase of ceramics (b) a binder phase metal, in which the phase of ceramics is a metal boride with a multimodal distribution of particle, where a metal is a metal of group IV, V or VI, and in which the binder phase metal comprises (I) Fe. Ni, CO and Mn. And (II) Cr, Al, Si, y or you.The method of making of multimodal boride cermets includes mixing particles of ceramic phase of multimodal, compressing the sintered particle in liquid phase of the mixture compressed in high temperatures, and finally cooling the composition of multimodal cermet.The advantages of multimodal cermets are high density of compaction, stiffness, fracture and high erosion resistance is improved up to 100 198 C. the multimodal cermets are suitable in erosion / corrosion in high temperature environments, chemicals and petroleum.