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| Number | Title | Issue Date |
| 7855159 | Alpha-beta SiAlON ballistic ceramic armor A SiAlON ceramic armor made from a starting powder mixture. The ceramic armor contains between about 60 weight percent and about 98 weight percent alpha SiAlON phase that contains an alpha SiAlON-bound rare earth element and between about 2 weight percent and about ... | 12/21/2010 |
| 7829491 | Silicon nitride sintered body and manufacturing method thereof, member for molten metal, member for hot working, and member for digging A silicon nitride sintered body comprising β-sialon expressed by a composition formula of Si6−ZAlZOZN8−Z, wherein z value being the dissolved amount is 0.1 to 1, as a main phase, a grain boundary phase and Fe silicide... | 11/09/2010 |
| 7629281 | Ceramic material and cutting tools made thereof The present invention relates to a ceramic material consisting of β-sialon (Si6−zAlzOzN), polytype 12H, an intergranular amorphous or partly crystalline phase, and containing yttrium with a z-value of from about 0.7 to less than a... | 12/08/2009 |
| 7514383 | Materials based on sialon's A material based on SiAlON contain 70-97 vol. % of alpha and beta-SiAlON and an amorphous or partially crystalline grain boundary phase and 3 to 30 vol.% of a hard material. The material has an alpha-SiAlON gradient which decreases from the outside to the inside. | 04/07/2009 |
| 7309673 | SiAlON ceramic and method of making the same A SiAlON ceramic body made from a starting powder mixture that includes silicon nitride powder and one or more powders that provide aluminum, oxygen, nitrogen, and two selected rare earth elements to the SiAlON ceramic body wherein the selected rare earth elements a... | 12/18/2007 |
| 7294596 | Sintered ceramic material with improved properties and method for its manufacturing A sintered ceramic material comprises a crystalline phase and an intergranular phase comprising a glass phase. The material is manufactured from a starting powder being mixed with an additive comprising one or more metal from a group of Li, Na, Mg, Ca, Sr, Ba, Sc, Y... | 11/13/2007 |
| 7288496 | Aluminum nitride sintered body and method of evaluation for the same An aluminum nitride sintered body is provided, including a polycrystalline structure in which grain boundary fracture toughness KICgb is 1.6 MPa·m1/2 or more. The grain boundary fracture toughness KICgb is dete... | 10/30/2007 |
| 7223709 | Method of making a SiAION ceramic A method of making a SiAlON ceramic body that includes a two phase composite comprising an alpha prime SiAlON phase and a beta prime SiAlON phase, the method includes the steps of: providing a starting powder that comprises at least about 70 weight percent silicon n... | 05/29/2007 |
| 7208433 | Ceramic plates for side DAMS of twin-drum continuous strip casters Ceramic plates for side dams of twin-drum continuous strip casters comprising a REAG phase of 10 to 90 vol. %, a Sialon phase of 5 to 50 vol. %, a BN phase of 5 to 50 vol. % and an amorphous phase of over 0 to 20 vol. %, with the REAG phase comprising at least one r... | 04/24/2007 |
| 7129191 | Composition useful for preparation of dense neodymium stabilised β-silicon nitride-α-SiAlON composite The present invention consists of a synergistic mixture of Si3N4, Al2O3, AlN, SiO2 and Nd2O3. The cost effective synergistic composition is useful for the preparation of dense neodymium sta... | 10/31/2006 |
| 7109139 | Process for manufacture of dense neodymium stabilized β-SiN-α-SiAlON composite The present invention provides a process for the manufacture of dense neodymium stabilized β-Si3N4-α-SiAlON composite, wherein a synergistic composition essentially consisting of Si3N4, Al2O3, AlN, ... | 09/19/2006 |
| 7094717 | SiAlON containing ytterbium and method of making A method for making a crystallized ceramic body containing a two phase composite comprising an alpha prime SiAlON phase that contains ytterbium and a beta prime SiAlON phase, the process includes the steps of: blending together a starting powder mixture that upon de... | 08/22/2006 |
| 7064095 | Doped alpha-beta sialon ceramics This invention is about SiALON ceramics comprising an alpha SiAlON, a beta SiAlON and an intergranular amorphous and/or crystalline phase. Said alpha SiALON phase was prepared from a multi-cationic mixture including the element of calcium, at least one of yttrium an... | 06/20/2006 |
| 7049256 | SiAlON containing ytterbium and method of making A SiAlON ceramic body made from a starting powder mixture that includes silicon nitride powder, and one or more powders that provide aluminum, oxygen, nitrogen and ytterbium to the SiAlON ceramic. The SiAlON ceramic body includes a two phase composite comprising alp... | 05/23/2006 |
| 6693054 | Method of making SiAlON containing ytterbium A SiAlON material that includes a two phase composite of an alpha prime SiAlON phase and a beta prime SiAlON phase. The alpha prime phase contains ytterbium. The alpha prime SiAlON phase being present in an amount between about 25 weight percent and about... | 02/17/2004 |
| 6592782 | Materials and methods for the separation of oxygen from air Metal oxides particularly useful for the manufacture of catalytic membranes for gas-phase oxygen separation processes having the formula: Ax A'x' A"2-(x+x') By Fey' B"2-(y+y') O5+z wh... | 07/15/2003 |
| 6300265 | Molybdenum disilicide composites Molybdenum disilicide/ଲ'-Si6-z Alz Oz N8-z, wherein z=a number from greater than 0 to about 5, composites are made by use of in situ reactions among -silicon nitride, molybdenum disilicide, and alum... | 10/09/2001 |
| 6139791 | Method of making in-situ toughened alpha prime SiAlon-based ceramics A method for making an alpha prime SiAlON-based ceramic article, including the steps of providing an admixture of starting materials and densifying said admixture. The admixture includes: beta silicon nitride; a source of aluminum selected from the group ... | 10/31/2000 |
| 6124225 | Cutting tools and wear resistant articles and material for same A ceramic having a relatively high proportion of an alpha prime SiAlON phase and exhibiting high hardness and toughness. In a particularly preferred embodiment, a cation of Gd is used as a modifying cation.... | 09/26/2000 |
| 6066583 | Process for the production of ceramic materials A process for the production of ' or ଲ'SiAlON from a starting mixture of silicon metal and clay, wherein the process includes heating the mixture in a flowing nitrogen, or nitrogen containing, atmosphere to a temperature sufficient to react t... | 05/23/2000 |
| 6001759 | Silicon nitride sintered body, method of preparing the same and nitrided compact A silicon nitride sintered body prepared through a nitriding reaction of Si, consists of crystal grains mainly composed of silicon nitride and/or SIALON and a grain boundary phase. The grain boundary phase includes a first component including at least one... | 12/14/1999 |
| 5990026 | Method of producing a surface modified sialon composite A sialon composite and fabrication method thereof in which the phase of a surface layer thereof is modified differently from that of the bulk. The surface layer is modified to -sialon or -ଲ sialon composite but the bulk is ଲ-sial... | 11/23/1999 |
| 5965471 | Wear and thermal shock resistant SiAION cutting tool material A sintered ceramic material for high speed machining of heat resistant alloys is provided comprising SiAION grains and 0.2-20 v/o intergranular phase. At least 80 v/o of said SiAION phase is beta SiAION having a z-value greater than 1.0, but less than 1.5... | 10/12/1999 |
| 5908798 | In-situ toughened alpha prime-sialon-based ceramics An in situ toughened ceramic having a relatively high proportion of an alpha prime SiAlON phase and including an elongated rod shape grain structure of that phase.... | 06/01/1999 |
| 5908797 | Silicon nitride based sintered material and method for producing same To provide a silicon nitride based sintered material having high strength and high hardness and superior in reliability, silicon nitride sintered material has a composition mainly composed of silicon nitride or Si--Al--O--N, and further comprises 0.5 to 3... | 06/01/1999 |
| 5851943 | Ceramic production process A process for the production of O'--SIALON ceramics from silicon metal, nitrogen and clay, the process comprising heating the silicon metal and the clay in a flowing nitrogen atmosphere to a temperature sufficient to react the components to form O'--SIALO... | 12/22/1998 |
| 5767026 | Silicon nitride ceramic and process for forming the same There are provided a process for forming a silicon nitride sintered body, encompassing a sialon sintered body, by making much of the superplasticity of the sintered body intact as a simple material without formation thereof into a composite material, and ... | 06/16/1998 |
| 5720919 | Al2 O3 and Y2 O3 containing silicon nitride having high mechanical strength at high temperatures A method of making a shaped part of sintered silicon nitride is disclosed which includes preparing a mixture of Si3 N4 having a BET specific surface area in the range of from 2 to 15 m2 /g, having an O2 content ... | 02/24/1998 |
| 5508240 | Aluminum nitride sintered body and method for manufacturing the same An aluminum nitride sintered body containing 1 to 10% by weight of an oxide of at least one element selected from a group consisting of a group IIIa element, Ca, Sr and Ba, the concentration of a Si component in the sintered body is 0.01 to 0.2% by weight... | 04/16/1996 |
| 5468696 | Highly corrosion resistant -sialon-like sintered body and process for preparation thereof A highly corrosion resistant -sialon-like sintered body consisting essentially of an -sialon composition represented by the composition formula Mx(Si,Al)12 (O,N)16 wherein M is at least one -sialon-soluble element sel... | 11/21/1995 |
| 5424256 | Silicon nitride sintered body Silicon nitride sintered bodies consisting of prismatic crystal grains of Si3 N4 and/or sialon, equi-axed crystal grains of Si3 N4 and/or sialon, a grain boundary phase existing among the prismatic and equi-axed... | 06/13/1995 |
| 5413972 | SiAlON composites and method of preparing the same A dense, substantially glass free, SiAlON ceramic material and method of making such material. The material has at least an alpha-SiAlON phase and a beta-SiAlON phase and exhibits excellent high temperature oxidation resistance and strength, good room tem... | 05/09/1995 |
| 5403792 | Low thermal conductivity ceramic and process for producing the same The low thermal conductivity ceramic of the present invention comprises a sialon (Si--Al--O--N) and at least one element selected from among La, Dy, Ce, Hf and Zr and has an average grain size of 1.5 μm or less and a thermal conductivity of 0.01 cal/cm.m... | 04/04/1995 |
| 5358797 | Adjusting shim The present invention provides an improved adjusting shim used in a valve train for an internal combustion engine for an automobile. The adjusting shim produced from a base material consisting of a ceramic material containing 80 to 98 wt. % of silicon nit... | 10/25/1994 |
| 5316988 | Sialon ceramic compositions and methods of fabrication A method of fabricating a SiAlON ceramic body includes: a) combining quantities of Si3 N4, Al2 O3 and CeO2 to produce a mixture; b) forming the mixture into a desired body shape; c) heating the body t... | 05/31/1994 |
| 5316856 | Silicon nitride base sintered body A sintered body of silicon nitride base solidly formed of interior and surface portions wherein the rate of decrease of the content Si or Si3 N4 and Sialon grains in the surface portion, with respect to that in the interior portion, ... | 05/31/1994 |
| 5302329 | Process for producing ଲ-sialon based sintered bodies The present invention is a process for producing ଲ-sialon based sintered bodies having a fracture toughness (KIC) of at least 6.5 MPam1/2. The process comprises preparing a feed that consists of 0.5-20 wt % of a sintering aid (... | 04/12/1994 |
| 5275986 | Silicon nitride sintered body A silicon nitride sintered body comprising -silicon nitride including '-sialon and ଲ'-sialon including ଲ-silicon nitride in which the content of the -silicon nitride including '-sialon in the surface part thereof is... | 01/04/1994 |
| 5275772 | Silicon nitride sintered body and process for producing the same The present invention relates to a silicon nitride sintered body [wherein the composition of Si3 N4 -first aid (Y2 O3 +MgO)-second aid (at least one of Al2 O3 and AlN)] falls within a range... | 01/04/1994 |
| 5227346 | Sialon composites and method of preparing the same This invention is a multi-phase SiAlON composite having a first alpha-SiAlON phase prepared from a multi-cationic mixture including oxides and nitrides of strontium, at least one of yttrium or a rare earth metal, and at least one other metal such as Ca, M... | 07/13/1993 |
