Housing, fluid stream treatment article, exhaust system and methods of manufacturing

An article for treating a fluid stream, comprising:

• a honeycomb body comprising a porous ceramic and having a plurality of channel walls extending axially between opposing first and second end faces and defining cell channels therebetween, and comprising an outer peripheral surface extending axially;
• and
• a housing in which the porous ceramic honeycomb body is mounted, comprising:
• an outer wall having a first coefficient of thermal expansion (CTE), α1, surrounding the honeycomb body, and
• first and second inner members disposed on an inner surface of the outer wall and extending radially inward, the first inner member having a second CTE, α2, greater than the first CTE, the first inner member extending axially and having a length L2, the second inner member having a third CTE, α22, greater than the first CTE,
• wherein the first and second inner members maintain contact with the honeycomb body at all temperatures in an operating temperature range.

A housing configured to mount a porous ceramic honeycomb body, comprising:

• an outer wall having a first coefficient of thermal expansion (CTE), α1, configured to be disposed around the honeycomb body outer peripheral surface to define an inner space containing the honeycomb body,
• at least one first inner member connected to the outer wall and extending axially in the inner space of the outer wall configured to contact a first end face of the honeycomb body, and
• at least one second inner member disposed on the outer wall in the inner space of the outer wall configured to contact a second end face of the honeycomb body,
• wherein the at least one first inner member has a second CTE, α2, greater than the first CTE, the second inner member has a third CTE, α22, greater than the first CTE,
• the at least one first inner member configured to expand more than the outer wall per unit length when the housing is heated to hold the honeycomb body between the at least one first inner member and the at least one second inner member at all temperatures in an operating temperature range.