Patent application number | Description | Published |
20080290568 | REINFORCED REFRACTORY CRUCIBLES FOR MELTING TITANIUM ALLOYS - Reinforced crucibles for melting titanium alloys having a facecoat including at least one facecoat layer, a backing including at least one backing layer, and at least one reinforcing element applied to at least a portion of one or more of the facecoat layer, the backing layer, or a combination thereof where the reinforcing element includes at least one composition selected from ceramic compositions, metallic compositions, and combinations thereof. | 11-27-2008 |
20080290569 | CRUCIBLES FOR MELTING TITANIUM ALLOYS - Crucibles for melting titanium alloys having a facecoat including at least one facecoat layer containing an oxide selected from scandium oxide, yttrium oxide, hafnium oxide, a lanthanide series oxide, and combinations thereof, and a backing including at least one backing layer where the crucible has a backing to facecoat thickness ratio of from about 6.5:1 to about 20:1. | 11-27-2008 |
20080292791 | METHODS FOR MAKING REINFORCED REFRACTORY CRUCIBLES FOR MELTING TITANIUM ALLOYS - Methods for making a reinforced refractory crucible for melting titanium alloys including providing a form, applying a facecoat to the form, the facecoat having at least one facecoat layer, applying a backing about the facecoat, the backing having at least one backing layer, applying at least one reinforcing element to at least a portion of the facecoat layer, the backing layer, or a combination thereof where the reinforcing element includes at least one composition selected from ceramic compositions, metallic compositions, and combinations thereof. | 11-27-2008 |
20080292804 | METHODS FOR MAKING REFRACTORY CRUCIBLES FOR MELTING TITANIUM ALLOYS - Methods for making refractory crucibles for melting titanium alloys including providing a form, applying a facecoat to the form, and applying a backing to the facecoat where the facecoat has at least one facecoat layer including an oxide selected from the group consisting of scandium oxide, yttrium oxide, hafnium oxide, a lanthanide series oxide, and combinations thereof and where the backing to the facecoat has a thickness ratio of from about 6.5:1 to about 20:1. | 11-27-2008 |
20090042056 | OXIDE-FORMING PROTECTIVE COATINGS FOR NIOBIUM-BASED MATERIALS - A coating suitable for use as protective oxide-forming coatings on Nb-based substrates, and particularly monolithic niobium-based alloys, exposed to high temperatures and oxidative environments. The coating contains aluminum, may further contain silicon, and optionally contains niobium, titanium, hafnium, and/or chromium, which in combination form one or more intermetallic phases that promote the formation of a slow-growing oxide scale. The intermetallic phases may be M(Al,Si) | 02-12-2009 |
20090050286 | Ceramic Cores for Casting Superalloys and Refractory Metal Composites, and Related Processes - A rare earth-based core for use in the casting of a reactive metal is described. The core contains a ceramic composition which includes at least about 10% by weight of monoclinic rare earth aluminate (RE | 02-26-2009 |
20090139074 | METHODS FOR MAKING REFRACTORY CRUCIBLES CAPABLE OF MANAGING THERMAL STRESS AND SUITABLE FOR MELTING HIGHLY REACTIVE ALLOYS - Methods for making refractory crucibles capable of managing thermal stresses and suitable for melting highly reactive alloys, the method involving providing a crucible having at least a facecoat and a backing, heating at least one retaining ring, applying the at least one retaining ring about at least a portion of the backing of the crucible; and allowing the at least one retaining ring to cool and shrink-fit about the crucible. | 06-04-2009 |
20090140473 | REFRACTORY CRUCIBLES CAPABLE OF MANAGING THERMAL STRESS AND SUITABLE FOR MELTING HIGHLY REACTIVE ALLOYS - Refractory crucibles capable of managing thermal stress and suitable for melting highly reactive alloys having a facecoat, a backing, and at least one retaining ring applied about at least a portion of the backing of the crucible, the retaining ring comprising a composition selected from the group consisting of conductive materials, non-conductive materials, and combinations thereof. | 06-04-2009 |
20090197758 | HAFNIA-MODIFIED RARE-EARTH METAL-BASED CERAMIC BODIES AND CASTING PROCESSES PERFORMED THEREWITH - Compositions suitable for use as cores and shell molds for casting of reactive metal alloys, and casting processes for producing components from such alloys. The composition contains a sintered particulate material of hafnia and at least one additional metal oxide in amounts to yield a ceramic composition containing up to 70 molar percent of hafnia, wherein the additional metal oxide is a rare-earth oxide, the sintered particulate material contains first and second phases, the first phase is the rare-earth oxide and hafnia in solid solution, the second phase is a compound of the rare-earth oxide and hafnia, and the second phase is less reactive with the reactive metal alloy than the first phase. | 08-06-2009 |
20100319870 | CERAMIC CORES FOR CASTING SUPERALLOYS AND REFRACTORY METAL COMPOSITES, AND RELATED PROCESSES - A rare earth-based core for use in the casting of a reactive metal is described. The core contains a ceramic composition which includes at least about 10% by weight of monoclinic rare earth aluminate (RE | 12-23-2010 |
20110146848 | OXIDE-FORMING PROTECTIVE COATIGNS FOR NIOBIUM-BASED MATERIALS - Coatings suitable for use as protective oxide-forming coatings on Nb-based substrates exposed to high temperatures and oxidative environments. The coatings contain chromium and/or molybdenum, preferably contains silicon, and optionally contains niobium, titanium, hafnium, iron, rhenium, tantalum, and/or tungsten, which in combination form multiple intermetallic phases, which in combination form one or more intermetallic phases that promote the formation of a slow-growing oxide scale. Depending on the particular coating composition, the intermetallic phases may be: a silicon-modified Cr | 06-23-2011 |
20120247705 | APPARATUS FOR CASTING FILAMENTS - A casting apparatus is presented. The casting apparatus includes a first chamber and a second chamber. The first chamber includes a crucible and a sealed discharge outlet. The second chamber includes a casting mold for casting a plurality of filaments of a superalloy composition. The second chamber further includes a discharge inlet aligned with the sealed discharge outlet of the first chamber. The casting apparatus further includes a first port for applying a positive pressure to the first chamber and a second port for applying a vacuum to the second chamber. The sealed discharge outlet includes a hermetic seal comprising a material having a melting temperature equal to or greater than a melting temperature of the superalloy composition. | 10-04-2012 |
20130000862 | CASTING METHODS AND APPARATUS - One embodiment is a method. The method includes providing a casting apparatus including a first chamber and a second chamber, wherein the first chamber is isolated from the second chamber. The method includes charging an alloy composition into a crucible present in the first chamber and melting the alloy composition in the crucible to form a molten alloy composition. The method includes discharging the molten alloy composition into a casting mold present in the second chamber; applying a positive pressure to the first chamber to create a first chamber pressure; and applying a vacuum to the second chamber to create a second chamber pressure, wherein the first chamber pressure is greater than the second chamber pressure. The method further includes casting a filament or a turbine component from the molten alloy composition in the casting mold. An apparatus for casting a filament or a turbine component is also provided. | 01-03-2013 |
20130081773 | CASTING MOLD COMPOSITION WITH IMPROVED DETECTABILITY FOR INCLUSIONS AND METHOD OF CASTING - The present disclosure relates to a titanium-containing article casting mold composition comprising calcium aluminate and an X-ray or Neutron-ray detectable element. Furthermore, present embodiments teach a method for detecting sub-surface ceramic inclusions in a titanium or titanium alloy casting by combining calcium aluminate, an element more radiographically dense than the calcium aluminate, and a liquid to form a slurry; forming a mold having the calcium aluminate and the radiographically dense element from the slurry; introducing a titanium aluminide-containing metal to the radiographically dense element-bearing mold; solidifying said titanium aluminide-containing metal to form an article in the mold; removing the solidified titanium aluminide-containing metal article from said mold; subjecting the solidified titanium aluminide-containing article to radiographic inspection to provide a radiograph; and examining said radiograph for the presence of the radiographically dense element on or in the article. | 04-04-2013 |
20130084190 | TITANIUM ALUMINIDE ARTICLES WITH IMPROVED SURFACE FINISH AND METHODS FOR THEIR MANUFACTURE - Titanium-containing articles having improved surface finishes and methods for improving surface finishes on titanium containing articles are provided. One method includes passing an abrasive medium across a surface of an titanium aluminide alloy-containing article, for example, a turbine blade, at high linear speed; deforming the surface of the titanium aluminide alloy-containing article with the abrasive medium and reducing a surface roughness of the surface of the titanium aluminide alloy-containing article and improving the surface finish of the surface. Surface finishes of 20 microinches Ra or less can be obtained. Though aspects of the invention can be used in fabricating high performance turbine blades, the methods disclosed can be applied to the treatment of any titanium-containing article for which it is difficult to obtain an improved surface finish. | 04-04-2013 |
20130108459 | MOLD COMPOSITIONS AND METHODS FOR CASTING TITANIUM AND TITANIUM ALUMINIDE ALLOYS | 05-02-2013 |
20130210320 | TITANIUM ALUMINIDE ARTICLE WITH IMPROVED SURFACE FINISH - Titanium-containing articles having improved surface finishes and methods for changing the surface of titanium containing articles, for example by removing overstock, are provided. One example method includes passing a fluid at high pressure across a surface of an titanium aluminide alloy-containing article, for example, a turbine blade, at high linear speed and deforming the surface of the titanium aluminide alloy-containing article, and removing material from the surface of the titanium aluminide alloy-containing article. Though aspects of the invention can be used in fabricating high performance turbine blades, the methods disclosed can be applied to the treatment of any titanium-containing article for which it is difficult to obtain an improved surface finish. | 08-15-2013 |
20130224066 | MOLD AND FACECOAT COMPOSITIONS AND METHODS FOR CASTING TITANIUM AND TITANIUM ALUMINIDE ALLOYS - The disclosure relates generally to mold compositions and methods of molding and the articles so molded. More specifically, the disclosure relates to mold compositions, intrinsic facecoat compositions, and methods for casting titanium-containing articles, and the titanium-containing articles so molded. | 08-29-2013 |
20130248061 | METHODS FOR PROCESSING TITANIUM ALUMINIDE INTERMETALLIC COMPOSITIONS - Methods of processing compositions containing titanium and aluminum, especially titanium aluminide intermetallic compositions (TiAl intermetallics) based on the TiAl (gamma) intermetallic compound. The methods entail processing steps that include a hot isostatic pressing (HIP) cycle and a heat treatment cycle that can be performed in a single vessel. TiAl intermetallic compositions processed in this manner preferably exhibit a duplex microstructure containing equiaxed and lamellar morphologies. | 09-26-2013 |
20130251537 | TITANIUM ALUMINIDE INTERMETALLIC COMPOSITIONS - Gamma titanium aluminide intermetallic compositions (gamma TiAl intermetallics) based on the TiAl (gamma) intermetallic compound. The gamma TiAl intermetallics contain chromium and niobium, as well as controlled amounts of carbon that achieve a desirable balance in room temperature mechanical properties and high temperature creep capabilities at temperatures approaching and possibly exceeding 1600° F. (about 870° C.). | 09-26-2013 |
20140030138 | CRUCIBLE AND FACECOAT COMPOSITIONS AND METHODS FOR MELTING TITANIUM AND TITANIUM ALUMINIDE ALLOYS - Crucible compositions and methods of using the crucible compositions to melt titanium and titanium alloys. More specifically, crucible compositions having intrinsic facecoats that are effective for melting titanium and titanium alloys for use in casting titanium-containing articles. Further embodiments are titanium-containing articles made from the titanium and titanium alloys melted in the crucible compositions. Another embodiment is a crucible curing device and methods of use thereof. | 01-30-2014 |
20140060767 | CALCIUM TITANATE CONTAINING MOLD COMPOSITIONS AND METHODS FOR CASTING TITANIUM AND TITANIUM ALUMINIDE ALLOYS - The disclosure relates generally to mold compositions comprising calcium aluminate and calcium titanate. The disclosure also relates to methods of molding and the articles so molded using the mold compositions. More specifically, the disclosure relates to calcium aluminate/calcium titanate mold compositions and methods for casting titanium-containing articles, and the titanium-containing articles so molded. | 03-06-2014 |
20140076512 | CASTING MOLD COMPOSITION WITH IMPROVED DETECTABILITY FOR INCLUSIONS AND METHOD OF CASTING - The present disclosure relates to a titanium-containing article casting mold composition comprising calcium aluminate and an X-ray or Neutron-ray detectable element. Furthermore, present embodiments teach a method for detecting sub-surface ceramic inclusions in a titanium or titanium alloy casting by combining calcium aluminate, an element more radiographically dense than the calcium aluminate, and a liquid to form a slurry; forming a mold having the calcium aluminate and the radiographically dense element from the slurry; introducing a titanium aluminide-containing metal to the radiographically dense element-bearing mold; solidifying said titanium aluminide-containing metal to form an article in the mold; removing the solidified titanium aluminide-containing metal article from said mold; subjecting the solidified titanium aluminide-containing article to radiographic inspection to provide a radiograph; and examining said radiograph for the presence of the radiographically dense element on or in the article. | 03-20-2014 |
20140150986 | CRUCIBLE AND EXTRINSIC FACECOAT COMPOSITIONS AND METHODS FOR MELTING TITANIUM AND TITANIUM ALUMINIDE ALLOYS - Crucible compositions and methods of using the crucible compositions to melt titanium and titanium alloys. More specifically, crucible compositions having extrinsic facecoats comprising a rare earth oxide that are effective for melting titanium and titanium alloys for use in casting titanium-containing articles. Further embodiments are titanium-containing articles made from the titanium and titanium alloys melted in the crucible compositions. Another embodiment is a crucible curing device and methods of use thereof. | 06-05-2014 |
20140209268 | CALCIUM HEXALUMINATE-CONTAINING MOLD AND FACECOAT COMPOSITIONS AND METHODS FOR CASTING TITANIUM AND TITANIUM ALUMINIDE ALLOYS - The disclosure relates generally to mold compositions and methods of molding and the articles so molded. More specifically, the disclosure relates to mold compositions, intrinsic facecoat compositions, and methods for casting titanium-containing articles, and the titanium-containing articles so molded, where the mold comprises calcium hexaluminate. | 07-31-2014 |
20140336806 | SYSTEMS AND METHODS FOR NON-DESTRUCTIVE EVALUATION OF MOLDS AND CRUCIBLES USED IN INVESTMENT CASTING - The present disclosure relates to systems and methods useful for non-destructive evaluation (NDE) of molds and crucibles used in investment casting processes, including, without limitation, for producing aircraft engines, land-based turbine engines, and the like. According to one aspect, the present disclosure provides a system for non-destructive evaluation that includes a support, a 3D scanning device, and a computer component. According to another aspect, the present disclosure provides a method for non-destructive evaluation that includes the steps of: providing a system for non-destructive evaluation of a mold or crucible according to the present disclosure; securing a mold or crucible to the support of the system; and operating the 3D scanning device of the system in conjunction with the computer component in order to create a 3D structure difference map that indicates whether the mold or crucible falls within or outside a desired structural integrity parameter range. | 11-13-2014 |
20150033982 | MIXING DEVICE, MIXING BLADES AND METHOD FOR MIXING CALCIUM ALUMINATE-CONTAINING SLURRIES - A mixing device having a mixing container and has a single-shaft agitator that extends into the mixing container. At the end of the drive shaft, a rotor body is arranged slightly above the bottom of the mixing container. The rotor body comprises a plurality of mixing blades, wherein the blades are, in one example, star-shaped and fixed in position to each other. A first end of the drive shaft is coupled to a motor and a second end of the drive shaft is configured to extend into the mixing vessel, wherein the blades are attached onto the second end of the drive shaft. The blades in one example include at least two coincidental knife-edged blades such that at least one of the knife-edged blades is facing upward. The mixing device in one example is used to mix calcium aluminate-containing slurries. | 02-05-2015 |
20150040801 | METHODS FOR CASTING TITANIUM AND TITANIUM ALUMINIDE ALLOYS - The disclosure relates generally to mold compositions and methods of molding and the articles so molded. More specifically, the disclosure relates to mold compositions and methods for casting titanium-containing articles, and the titanium-containing articles so molded. | 02-12-2015 |
20150078912 | CERAMIC CORE COMPOSITIONS, METHODS FOR MAKING CORES, METHODS FOR CASTING HOLLOW TITANIUM-CONTAINING ARTICLES, AND HOLLOW TITANIUM-CONTAINING ARTICLES - The disclosure relates generally to core compositions and methods of molding and the articles so molded. More specifically, the disclosure relates to core compositions and methods for casting hollow titanium-containing articles, and the hollow titanium-containing articles so molded. | 03-19-2015 |
20150078958 | CERAMIC CORE COMPOSITIONS, METHODS FOR MAKING CORES, METHODS FOR CASTING HOLLOW TITANIUM-CONTAINING ARTICLES, AND HOLLOW TITANIUM-CONTAINING ARTICLES - The disclosure relates generally to core compositions and methods of molding and the articles so molded. More specifically, the disclosure relates to core compositions and methods for casting hollow titanium-containing articles, and the hollow titanium-containing articles so molded. | 03-19-2015 |