Patent ID: 7229598
Filing Date: 2007-06-12
Classification: B01J,B23K,F01N,Y10T

Abstract:
1. A diffusion bonded metallic catalyst carrier comprising: a honeycomb body comprising a piece of corrugated foil made of heat-resistant stainless steel containing aluminum and a piece of flat foil made of stainless steel, the piece of corrugated foil and the piece of flat foil alternately wound or laminated on each other; and an outer cylinder made of metal with the honeycomb body located in the outer cylinder and bonded thereto, and wherein the piece of corrugated foil is bonded to the piece of flat foil by diffusion bonding conducted by heat treatment in a vacuum, wherein exhaust gas channels extend from an exhaust gas entry side to an exhaust gas delivery side of the metallic catalyst carrier honeycomb body in a direction perpendicular to the rolling direction of the corrugated foil and the flat foil; wherein the pieces of foil have a surface roughness in a width direction of the foil after said diffusion bonding conducted by heat treatment in a vacuum wherein an arithmetical mean deviation of asserted profile Ra after diffusion bonding conducted by heat treatment in a vacuum is 0.001 to 2.0 μm, diffusion bonds formed by said diffusion bonding provide joint sections between two pieces of foil of the corrugated foil and the flat foil with no sintered bridges formed at both end portions of the joint sections in the longitudinal direction of the pieces of foil, solder bonds are located at contact portions of the piece of flat foil and the piece of corrugated foil at the exhaust gas entry side; and diffusion bonds are located at the contact portions of the piece of flat foil and the piece of corrugated foil at the exhaust gas delivery side.