Abstract: An improved porous ceramic foam filter, and method of making the porous ceramic foam filter is provided. The porous ceramic foam filter comprising 28-78 wt % alumina; 18-78 wt % silica; and 1-15 wt % Group II oxide.

Abstract: A method of making an article that is comprised of a metal foam in contact with a base metal by an intermediate braze composition, in particular, a method of brazing a metal foam to a base metal via a braze composition. In one preferred method, a polymeric foam is coated with a powdered metal composition and thermally-treated to volatilize the polymeric foam and form an open-cell metal foam. A second polymeric foam is coated with a braze composition. The second coated polymeric foam is thermally-treated to volatilize the polymeric foam. The metal foam is surrounded by the second coated polymeric foam to form a composite metal foam. The composite metal foam is placed in contact with a base metal to form an article. The article is thermally-treated to a brazing temperature to form a brazed metal article.

Abstract: A pelleting die is provided, preferably in cylindrical form. The die includes a cylindrical body having inner and outer cylindrical surfaces and holes through the surfaces in which particulate material is extruded to form pellets. The die is formed of an H-group steel alloy, preferably H13 alloy, with the surfaces being nitrided to provide increased surface hardness, resistance to wear, improved fatigue life and improved corrosion resistance.

Abstract: An improved method for increasing a selected metal composition of a substrate includes plating the selected metal component on the substrate followed by providing a single pass weld overlay with the selected metal containing weld filler metal to increase the metal weld clad deposit.

Abstract: A method for coating a substrate with a corrosion resistant surface comprises the steps of coating a portion of the substrate with a nickel (II) nitrate hexahydrate solution. The solution-coated substrate is then heated to a temperature greater than 303.degree. C. until a nickel oxide coating remains.

Abstract: The surface hardening diffusion process for an austenitic material such as 300-series stainless steel uses a pack carburization process at a temperature range from about 1500.degree. F. to about 2500.degree. F. for a period of time ranging from about one (1) to about eight (8) hours. Chromium carbides are formed on the surface of the austenitic material for increasing its wear resistance.