General Electric Company

Momentive Performance Materials Gmbh

Soraa, Inc.

Slt Technologies, Inc.

John Thomas Leman

Mark Philip D'Evelyn

Dong-Sil Park

Herman Otto Krabbenhoft

Fred Sharifi

Myles Standish Peterson, Ii

Thomas Francis McNulty

Joell Randolph Hibshman, Ii

Ching-Pang Lee

Xi Yang

Frederic Joseph Klug

John Morgan Whitney

Judith Stein

Hsin-Pang Wang

Tao Li

Anthony Yu-Chung Ku

Navjot Singh

Marc Thomas Edgar

Eric Alan Estill

Kristi Jean Narang

Steven Alfred Tysoe

Huicong Hong

Peter John Bonitatibus, Jr

Job Thomas Rijssenbeek

John Patrick Pollinger

Kathryn Ann Shaffer

Rebecca Suzanne Northey

Mark Philip D'evelyn

Ayesha Maria Gonsalves

Matthew Thomas Johnson

Thomas Francis Mcnulty

Miles Standish Peterson

Joell Randolph Hibshman

The present disclosure generally relates to a ceramic core comprising predominantly mullite, which is derived from a precursor comprising alumina particles and siloxane binders. Free silica is present in the ceramic body, but is largely unavailable for reaction with metal alloys used in investment casting. Methods of making cast metal articles are also disclosed.

Compositions for cores used in investment casting

A method of preparing a mold to form an article is provided. In one embodiment, the method includes preparing a quantity of fluid including lightweight oil, submerging the mold in the quantity of fluid such that the fluid at least partially enters internal cavities of the mold, and filling asperities defined in walls of the mold. The filling includes creating a negative pressure in the mold while submerged in the quantity of fluid, and removing substantially all air from the internal cavities.

Method of preparing a mold to form an article and method of forming the article with the mold

A method of maintaining the performance level of an electrochemical cell is described. The cell usually includes a negative electrode that includes an alkali metal; a positive electrode that includes at least one transition metal halide; a molten salt electrolyte based on an alkali metal haloaluminate; and a sodium ion-conducting solid electrolyte partitioning the positive electrode from the negative electrode. The method is based on a treatment regimen that includes the step of applying a series of electrical cycles to the cell, wherein the series includes at least one deep discharge of the cell. Each discharge of the cell is usually followed by recharging the cell to its available capacity.

Method for maintaining the performance level of an electrochemical cell

A composition including a polycrystalline metal nitride having a number of grains is provided. These grains have a columnar structure with one or more properties such as, an average grain size, a tilt angle, an impurity content, a porosity, a density, and an atomic fraction of the metal in the metal nitride.

Crystalline composition, device, and associated method

A composition including a polycrystalline metal nitride having a number of grains is provided. These grains have a columnar structure with one or more properties such as, an average grain size, a tilt angle, an impurity content, a porosity, a density, and an atomic fraction of the metal in the metal nitride. An apparatus for preparing a metal nitride is provided. The apparatus may include a housing having an interior surface that defines a chamber and an energy source to supply energy to the chamber. A first inlet may be provided to flow a nitrogen-containing gas into the chamber. Raw materials may be introduced into the chamber through a raw material inlet. A second inlet may be provided to flow in a halide-containing gas in the chamber. The apparatus may further include a controller, which communicates with the various components of the apparatus such as, sensors, valves, and energy source, and may optimize and control the reaction.

Apparatus for making crystalline composition

A method of making a metal nitride is provided. The method may include introducing a metal in a chamber. A nitrogen-containing material may be flowed into the chamber. Further, a hydrogen halide may be introduced. The nitrogen-containing material may react with the metal in the chamber to form the metal nitride.

Method for making crystalline composition

A green product for use in fabricating a ceramic article comprises a ceramic powder immobilized within a silicone matrix, wherein the silicone matrix comprises one or more cross linked or polymerized silicone monomers and/or oligomers, wherein the one or more cross linked or polymerized silicone monomers and/or oligomers have a alkenyl reactive functional group and a hydride reactive functional group. Processes for forming a green product and a ceramic core with the silicone monomers and/or oligomers are also disclosed.

Silicone binders for investment casting

A method for growing a nitride crystal and a crystalline composition selected from one of AlN, InGaN, AlGaInN, InGaN, and AlGaNInN is provided. The composition comprises a true single crystal, grown from a single nucleus, at least 1 mm in diameter, free of lateral strain and tilt boundaries, with a dislocation density less than about 10cm.

Method for forming nitride crystals

Disclosed herein is a method comprising injecting into a thin wall disposable core die a slurry having a viscosity of about 1 to about 1,000 Pascal-seconds at room temperature when tested at a shear rate of up to 70 secondsand a flow index of less than 0.6 at a pressure of up to about 7 kilograms-force per square centimeter; wherein the thin wall disposable core die has an average wall thickness of about 1.5 to about 10 millimeters; curing the slurry to form a cured ceramic core; removing the thin wall disposable core die from the cured ceramic core; and firing the cured ceramic core to form a solidified ceramic core.

Disposable thin wall core die, methods of manufacture thereof and articles manufactured therefrom

A method for a growing solid-state, spectrometer grade II-VI crystal using a high-pressure hydrothermal process including the following steps: positioning seed crystals in a growth zone of a reactor chamber; positioning crystal nutrient material in the nutrient zone of the chamber; filling the reactor with a solvent fluid; heating and pressuring the chamber until at least a portion of the nutrient material dissolves in the solvent and the solvent becomes supercritical in the nutrient zone; transporting supercritical from the nutrient zone to the growth zone, and growing the seed crystals as nutrients from the supercritical fluid deposit on the crystals.

Crystals for a semiconductor radiation detector and method for making the crystals

Condensation curable poly(fluoroorgano)siloxane-poly(silarylene)siloxane block copolymer compositions having a glass transition temperature not exceeding about &minus;54&deg; C. and excellent solvent resistance have been found useful as sealants. Polyalkoxysilylorgano compounds, such as 1,4-bis&lsqb;trimethoxysilyl(ethyl)&rsqb;benzene have been found to be effective as cross-linkers.

Copolymer sealant compositions and method for making

A method for making a coated substrate, a system, and articles made thereby are provided wherein the coated substrate comprises a coating composition and a substrate. The coating composition comprises an alkenyl functional compound and a hydride functional compound, and the substrate comprises a catalytically effective amount of a platinum group metal catalyst having the formula Z Pt(0)L wherein L comprises an electron-withdrawing ester ligand, a quinone-based ligand, or combination thereof, y is in a range between about 1 and about 4, Z comprises a coordinating ligand, and x is in a range between 0 and about 3 wherein x&plus;y is in a range between about 2 and about 4.

Method for making coated substrates and articles made thereby

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Niskayuna, NY, United States of America

John Thomas Leman