21
Ranjan Ray, Donald E Polk, Bill C Giessen: Nickel base superalloys which contain boron and have been processed by a rapid solidification process. Marko Materials, Morse Altman Oates & Dacey, November 16, 1982: US04359352 (21 worldwide citation)

Nickel and iron-nickel base alloys are described together with a rapid solidification process used in the preparation thereof to provide materials useful in the fabrication of parts subject to high temperature operating conditions. The alloys include commercial nickel base superalloys to which a spe ...


22
Ranjan Ray, Donald W Scott: CASTINGS OF METALLIC ALLOYS WITH IMPROVED SURFACE QUALITY, STRUCTURAL INTEGRITY AND MECHANICAL PROPERTIES FABRICATED IN REFRACTORY METALS AND REFRACTORY METAL CARBIDES COATED GRAPHITE MOLDS UNDER VACUUM. Santoku America, Stevens Davis Miller & Mosher, January 17, 2006: US06986381 (20 worldwide citation)

Molds are fabricated having a substrate of high density, high strength ultrafine grained isotropic graphite, and having a mold cavity coated with a refractory metal such as W or Re or a refractory metal carbide such as TaC or HfC. The molds may be made by making the substrate (main body) of high den ...


23
Ranjan Ray, Donald W Scott: Castings of metallic alloys with improved surface quality, structural integrity and mechanical properties fabricated in finegrained isotropic graphite molds under vacuum. Santoku America, Stevens Davis Miller & Mosher, October 5, 2004: US06799626 (20 worldwide citation)

Methods for making various metallic alloys such as nickel, cobalt and/or iron based superalloys, stainless steel alloys, titanium alloys and titanium aluminide alloys into engineering components by melting of the alloys in a vacuum or under a low partial pressure of inert gas and subsequent casting ...


24
Ranjan Ray, Carl F Cline, Donald E Polk, Lance A Davis: Production of improved metal alloy filaments. Allied Chemical Corporation, Gerhard H Fuchs, May 15, 1979: US04154283 (20 worldwide citation)

Metal alloy filaments having improved surface characteristics and enhanced mechanical properties are extracted from a source of molten metal alloy using a quenching wheel in a partial vacuum.


25
Ranjan Ray, Donald W Scott: Centrifugal casting of titanium alloys with improved surface quality, structural integrity and mechanical properties in isotropic graphite molds under vacuum. Santoku America, Stevens Davis Miller & Mosher, June 29, 2004: US06755239 (19 worldwide citation)

Methods for making various titanium base alloys and titanium aluminides into engineering components such as rings, tubes and pipes by melting of the alloys in a vacuum or under a low partial pressure of inert gas and subsequent centrifugal casting of the melt in the graphite molds rotating along its ...


26
Ranjan Ray: Iron-refractory metal-boron glassy alloys. Allied Chemical Corporation, Ernest D Buff, Gerhard H Fuchs, January 9, 1979: US04133679 (18 worldwide citation)

Glassy alloys containing iron and molybdenum or tungsten, together with low boron content, are disclosed. The glassy alloys of the invention consist essentially of about 5 to 12 atom percent boron, a member selected from the group consisting of about 25 to 40 atom percent molybdenum and about 13 to ...


27
Ranjan Ray, Lee E Tanner, Carl F Cline: Metallic glasses with high crystallization temperatures and high hardness values. Allied Chemical Corporation, David W Collins, Arthur J Plantamura, November 22, 1977: US04059441 (18 worldwide citation)

Amorphous metallic alloys having substantial amounts of one or more of the elements of Mo, W, Ta and Nb evidence both high thermal stability, with crystallization temperatures ranging from about 650.degree. C to 975.degree. C, and high hardness, with values ranging from about 800 to 1400 DPH (diamon ...


28
Ranjan Ray: Metallic glass powders from glassy alloys. Allied Chemical Corporation, Gerhard H Fuchs, Michael J Weins, September 22, 1981: US04290808 (16 worldwide citation)

Metallic glass powder is prepared by heating a solid metallic glass body to a temperature below its glass transition temperature for time sufficient to effect embrittlement, followed by comminution of the embrittled metallic glass body.


29
Ranjan Ray, Donald E Polk, Bill C Giessen: Tool steels which contain boron and have been processed using a rapid solidification process and method. Marko Materials, Morse Altman Oates & Dacey, March 9, 1982: US04318733 (16 worldwide citation)

Alloys having compositions similar to commercial tool steels, but modified by the addition of 0.1 to 1.5 wt. % boron are disclosed. The alloys are subjected to a rapid solidification processing (RSP) technique, producing cooling rates between 10.sup.5 -10.sup.7 .degree.C./sec. The as-quenched RSP ri ...


30
Ranjan Ray: Method for making metallic glass powder. Allied Corporation, Ernest D Buff, Gerhard H Fuchs, June 18, 1985: US04523621 (15 worldwide citation)

A method for making metallic glass powder is disclosed, which involves atomizing a jet of molten glass forming metal alloy by impinging with a moving body to form a stream of discrete molten droplets of the metal alloy, followed by impinging that stream on a travelling chill surface to effect rapid ...