Erosion-corrosion resistant nitride cermets

C - Chemistry – Metallurgy – 22 – C

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C22C 29/16 (2006.01)

Patent

CA 2523590

The invention includes a cermet composition represented by the formula (PQ)(RS)comprising: a ceramic phase (PQ) and a binder phase (RS) wherein, P is a metal selected from the group consisting of Si, Mn, Fe, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W and mixtures thereof, Q is nitride, R is a metal selected from the group consisting of Fe, Ni, Co, Mn and mixtures thereof, S consists essentially of at least one element selected from Cr, Al, Si, and Y, and at least one reactive wetting aliovalent element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W and mixtures thereof.

La présente invention se rapporte à une composition de cermet représentée par la formule (PQ)(RS), qui contient une phase céramique (PQ) et une phase liante (RS). Dans ladite formule, P représente un métal sélectionné parmi Si, Mn, Fe, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, et des mélanges de ces derniers ; Q représente nitrure ; R représente un métal sélectionné parmi Fe, Ni, Co, Mn, et des mélanges de ces derniers ; et S est essentiellement composé d'au moins un élément sélectionné parmi Cr, Al, Si et Y, et d'au moins un élément aliovalent mouillant réactif sélectionné parmi Ti, Zr, Hf, V, Nb, Ta, Cr, Mo et W.

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