Back to results
US 9,067,831 B2Granted
Honeycomb structure comprising a multilayer cement skin
AssigneeCorning Incorporated
InventorsThomas Richard Chapman, Jacob George, Ralph Henry Hagg, Amit Halder, Huthavahana Kuchibhotla Sarma
Life of this patent
Estimating the term…
Abstract
Disclosed is a ceramic honeycomb structure comprising a honeycomb body and a multilayered outer layer formed of a thick core layer applied and rapidly dried and a thin clad layer dried more gently to form a crack free dual skin layer. The core layer may have properties that are closer to those of the ceramic honeycomb body in service than the clad layer that may provide a tough outer shell to withstand handling and assembly.
Claims11
A honeycomb structure, comprising:
- a honeycomb body including a plurality of cells extending axially between first and second opposing end faces of the honeycomb body, the cells comprising intersecting porous walls;
- a first cement mixture layer disposed over a periphery of the honeycomb body;
- and
- a second cement mixture layer disposed over the first cement mixture layer,
- wherein the first cement mixture is a calcined cement mixture or a cold set cement mixture, and the second cement mixture is a calcined cement mixture or a cold set cement mixture, and
- wherein
- the first cement mixture layer comprises a first porosity, a first modulus of rupture, and a first modulus of elasticity, and
- the second cement mixture layer comprises a second porosity less than the first porosity, a second modulus of rupture greater than the first modulus of rupture, and a second modulus of elasticity greater than the first modulus of elasticity.
5 more elements
Dependencies are inferred from the claim text.