High temperature resistant reticulated foam structure and process

摘要

A high temperature resistant reticulated porous foam structure for use as a diesel emission particulate trap. A reticulated porous foam substrate which is capable of maintaining its structural integrity at temperatures in excess of approximately 2500, and preferably 2700, degrees Fahrenheit is coated with a formed in situ oxidation resistant coating which extends substantially throughout the interstices of the porous foam structure. The coating comprises very thin alternate layers of silicon carbide and a carbide formed from a Group IVA metal which has a melting point in excess of approximately 1850 degrees Centigrade.