Composite ceramic materials, articles, and method of manufacture
AssigneeCorning Incorporated
InventorsHuthavahana Kuchibhotla Sarma, Elizabeth Marie Vileno, Bryan Ray Wheaton
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Abstract
Composite ceramic materials are disclosed herein which comprise two or more crystalline phases, wherein a first crystalline phase comprises a first refractory material having a first melting point, and a second crystalline phase comprises a second refractory material having a second melting point which is lower than the first melting point, and the second crystalline phase comprises large domain sizes of the second refractory material. Articles comprising such a composite ceramic material, such as honeycomb bodies, catalytic substrates, and particulate filters, are also disclosed herein, in addition to methods of manufacture thereof.
Claims38
A ceramic material comprising:
- a first crystalline phase comprised of a first refractory material, the first crystalline phase having a first melting point;
- a second crystalline phase comprised of a second refractory material having a second melting point which is lower than the first melting point, wherein the second crystalline phase comprises domain sizes of greater than 5,000 μm2 as measured by Electron Backscattered Diffraction (EBSD);
- wherein the first crystalline phase comprises MgTi2O5 in solid solution with tialite.
A composite ceramic material comprising:
- a first crystalline phase comprised of tialite in solid solution with MgTi2O5, the first crystalline phase having a first melting point and a first maximum domain size in a select cross-sectional plane;
- a second crystalline phase comprised of cordierite having a second melting point which is lower than the first melting point, and having a second maximum domain size in the select cross-sectional plane, wherein a ratio of the second maximum domain size to the first maximum domain size is 6.0 or more;
- wherein the second crystalline phase has domain sizes of greater than 5,000 μm2 as measured by Electron Backscattered Diffraction (EBSD).
A ceramic material comprising:
- a first crystalline phase comprised of a first refractory material, the first crystalline phase having a first melting point;
- a second crystalline phase comprised of a second refractory material having a second melting point which is lower than the first melting point, wherein the second crystalline phase comprises domain sizes of greater than 5,000 μm2 as measured by Electron Backscattered Diffraction (EBSD);
- and
- a third crystalline phase;
- wherein the first crystalline phase comprises mullite, the second crystalline phase comprises cordierite, and the third crystalline phase comprises tialite and MgTi2O5.
Dependencies are inferred from the claim text.