Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Reexamination Certificate
2006-12-15
2009-06-09
Wyszomierski, George (Department: 1793)
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
C428S545000
Reexamination Certificate
active
07544228
ABSTRACT:
One form of the disclosure 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 Al, Si, Mg, Ca, Y, Fe, Mn, Group IV, Group V, Group VI elements, and mixtures thereof,Q is oxide,R is a base 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 and Si and at least one reactive wetting element selected from the group consisting of Ti, Zr, Hf, Ta, Sc, Y, La, and Ce,wherein the ceramic phase (PQ) ranges from about 55 to 95 vol % based on the volume of the cermet and is dispersed in the binder phase (RS) as particles with a diameter of 100 microns or greater. Another form of the disclosure relates to a bimodal size distribution of the metal oxide ceramic phase within the metal matrix phase. The metal oxide cermet compositions disclosed are suitable for high temperature applications requiring superior erosion and corrosion resistance.
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Antram Robert L.
Bangaru Narasimha-Rao V.
Chun ChangMin
Fowler Christopher J.
Peterson John R.
ExxonMobil Research and Engineering Company
Migliorini Robert A.
Wyszomierski George
Zhu Weiping
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