Advanced erosion resistant carbonitride cermets
AssigneeExxonMobil Research and Engineering Company
InventorsChangMin Chun, Narasimha-Rao Venkata Bangaru, Hyun-Woo Jin, Jayoung Koo, John Roger Peterson, Robert Lee Antram, Christopher John Fowler
Life of this patent
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Abstract
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 Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Fe, Mn and mixtures thereof, Q is carbonitride, R is a metal selected from the group consisting of Fe, Ni, Co, Mn and mixtures thereof, S comprises at least one element selected from Cr, Al, Si and Y.
Claims22
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 Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Fe, Mn and mixtures thereof,
- Q is carbonitride,
- R comprises Fe and a metal selected from the group consisting of Ni, Co, Mn and mixtures thereof,
- S comprises Cr, at least one element selected from Al, Si and Y, and at least one aliovalent element selected from the group consisting of Ti, Zr, Hf, Ta, V, Nb, Mo, W, and
- wherein the combined weights of said Cr, Al, Si, Y and mixtures thereof is at least 12 wt %, and the combined weights of said at least one aliovalent element is from 0.01 to 5 wt % based on the weight of the binder phase (RS), and
- wherein the ceramic phase (PQ) ranges from about 50 to 95 vol % based on the volume of the cermet.
A bulk cermet material 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 Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Fe, Mn and mixtures thereof,
- Q is carbonitride,
- R comprises Fe and a metal selected from the group consisting of Ni, Co, Mn and mixtures thereof,
- S comprises Cr, at least one element selected from Al, Si and Y, and at least one aliovalent element selected from the group consisting of Ti, Zr, Hf, Ta, V, Nb, Mo, W,
- wherein the combined weights of said Cr, Al, Si, Y and mixtures thereof is at least 12 wt %, and the combined weights of said at least one aliovalent element is from 0.01 to 5 wt % based on the weight of the binder phase (RS),
- wherein the ceramic phase (PQ) ranges from about 50 to 95 vol % based on the volume of the cermet, and
- wherein the overall thickness of the bulk cermet material is greater than 5 millimeters.
Dependencies are inferred from the claim text.