Abstract:
An abrasive article includes a body having abrasive particles contained within a bond material. The abrasive particles can include a majority content of silicon nitride and a minority content of sintering material including at least two rare-earth oxide materials. In an embodiment, the rare-earth oxide materials can include Nd2O3 and Y2O3. In a particular embodiment, the abrasive particles comprise a content (wt%) of Nd2O3 that is greater than a content of Y2O3 (wt%).
Abstract translation:磨料制品包括具有包含在粘合材料内的磨料颗粒的主体。 研磨颗粒可以包括大部分氮化硅含量和少量含有至少两种稀土氧化物材料的烧结材料。 在一个实施方案中,稀土氧化物材料可以包括Nd 2 O 3和Y 2 O 3。 在一个具体实施方案中,磨料颗粒包含大于Y 2 O 3含量(重量%)的Nd 2 O 3的含量(重量%)。
Abstract:
A method of forming a silicon carbide sintered body includes mixing silicon carbide powder with a boron additive and carbon to form a green mixture and shaping the green mixture into a green body, and coating the green body with boron nitride. The method further includes glass encapsulating the green body and hot isostatic pressing the glass encapsulated green body at a temperature in a range of between about 1900 °C and about 2400 °C for a time period in a range of between about one hour and about three hours, to thereby form a silicon carbide sintered body having a density at least 97% of the theoretical density of silicon carbide.
Abstract:
A ceramic component is disclosed, including a sintered ceramic body formed from a composition comprising a first ceramic material, and a plurality of inclusions in the ceramic body, each inclusion comprising graphite and a second ceramic material.
Abstract:
The present invention relates to a method for making a hexagonal boron nitride slurry and the resulting slurry. The method involves mixing from about 0.5 wt.% to about 5wt.% surfactant with about 30 wt.% hexagonal boron nitride powder in a medium under conditions effective to produce a hexagonal boron nitride slurry. The present invention also relates to a method for making a spherical boron nitride powder and a method for making a hexagonal boron nitride paste using a hexagonal boron nitride slurry. Another aspect of the present invention relates to a hexagonal boron nitride paste including from about 60 wt.% to about 80 wt.% solid hexagonal boron nitride. Yet another aspect of the present invention relates to a spherical boron nitride powder, a polymer blend including a polymer and the spherical hexagonal boron nitride powder, and a system including such a polymer blend.
Abstract:
Un artículo compuesto que comprende: un cuerpo que incluye: una primera fase que consiste esencialmente en nitruro de silicio, siendo la primera fase al menos aproximadamente un 50 % en peso y no mayor de aproximadamente un 90 % en peso para el peso total del cuerpo; una segunda fase que consiste esencialmente en carburo de silicio, siendo la segunda fase al menos un 5 % en peso y no mayor de un 45 % en peso para el peso total del cuerpo; una tercera fase que comprende una primera y una segunda porción, en la que la primera porción de la tercera fase comprende un material de fase amorfa que incluye un material de óxido de aluminio y magnesio; y en el que: el cuerpo comprende un contenido de nitrógeno en exceso de la cantidad estequiométrica de nitrógeno asociada con el material de nitruro, y la primera porción de la tercera fase comprende un contenido de nitrógeno de al menos aproximadamente un 1,6 % en peso para el peso total del cuerpo; y el cuerpo comprende un mayor contenido de la segunda fase que el contenido de la tercera fase, incluyendo la cantidad total de la primera porción y la segunda porción.
Abstract:
A composite article having a body including a first phase that includes a nitride material, a second phase that includes a carbide material, and a third phase having one of an amorphous phase material with a nitrogen content of at least about 1.6 wt % or an amorphous phase material comprising carbon.
Abstract:
The invention relates to a hexagonal boron nitride slurry comprising about 0.5 wt.% to about 5 wt.% surfactant and about 30 wt.% to about 50 wt.% hexagonal boron nitride powder in a medium, and to a method for making the hexagonal boron nitride slurry. Further subject matter of the invention is a method for making spherical boron nitride using the hexagonal boron nitride slurry of the invention, and a method for masking a agonal boron nitride paste using the hexagonal boron nitride slurry of the invention, as well as the hexagonal boron nitride paste obtainable by the method.