公开(公告)号：US12054433B2

公开(公告)日：2024-08-06

申请号：US17018921

申请日：2020-09-11

Applicant: General Atomics

Inventor： Jiping Zhang ,  Austin Travis ,  Jonas Opperman ,  George Jacobsen

IPC: C04B35/80 ,  C04B35/628 ,  C04B35/65 ,  C04B35/657

CPC classification number: C04B35/80 ,  C04B35/62839 ,  C04B35/62863 ,  C04B35/62886 ,  C04B35/65 ,  C04B35/657 ,  C04B2235/3826 ,  C04B2235/5244 ,  C04B2235/5252 ,  C04B2235/5436 ,  C04B2235/5454 ,  C04B2235/616

Abstract: Disclosed are techniques and methods for producing silicon carbide and ceramic matrix composites from hydrocarbons. In one aspect, a method includes preforming a shape using silicon carbide fibers placed into a chamber, evacuating the chamber causing a silicon and polymer slurry to enter the chamber, and pressurizing the chamber causing the silicon and polymer slurry to permeate the silicon carbide fibers. The method includes heating the chamber to cause pyrolysis of the polymer and a hydrocarbon passed into the chamber into carbon and hydrogen gas. The carbon from the pyrolyzed polymer and hydrocarbon provide a coating of carbon on the silicon in the silicon and polymer slurry. The method includes heating the chamber to a higher temperature causing the silicon to melt and react with the carbon to form silicon carbide. The formed silicon carbide and the silicon carbide fibers form the ceramic matrix composite.

公开(公告)号：US20220081368A1

公开(公告)日：2022-03-17

申请号：US17018921

申请日：2020-09-11

Applicant: General Atomics

Inventor： Jiping Zhang ,  Austin Travis ,  Jonas Opperman ,  George Jacobsen

IPC: C04B35/80 ,  C04B35/628 ,  C04B35/65 ,  C04B35/657

Abstract: Disclosed are techniques and methods for producing silicon carbide and ceramic matrix composites from hydrocarbons. In one aspect, a method includes preforming a shape using silicon carbide fibers placed into a chamber, evacuating the chamber causing a silicon and polymer slurry to enter the chamber, and pressurizing the chamber causing the silicon and polymer slurry to permeate the silicon carbide fibers. The method includes heating the chamber to cause pyrolysis of the polymer and a hydrocarbon passed into the chamber into carbon and hydrogen gas. The carbon from the pyrolyzed polymer and hydrocarbon provide a coating of carbon on the silicon in the silicon and polymer slurry. The method includes heating the chamber to a higher temperature causing the silicon to melt and react with the carbon to form silicon carbide. The formed silicon carbide and the silicon carbide fibers form the ceramic matrix composite.

公开(公告)号：US20210166825A1

公开(公告)日：2021-06-03

申请号：US17153855

申请日：2021-01-20

Applicant: General Atomics

Inventor： Jonathan David Sheeder ,  Jiping Zhang ,  Christian Peter Deck ,  Hesham Ezzat Khalifa ,  Robert Warren Stemke ,  Brian Stephen Austin ,  Gokul Vasudevamurthy ,  Carlos Bacalski ,  Eric Song ,  Christina Allyssa Back

IPC: G21C3/07 ,  G21C3/10 ,  G21C21/02

Abstract: This patent document relates to systems, structures, devices, and fabrication processes for ceramic matrix composites suitable for use in a nuclear reactor environment and other applications requiring materials that can withstand high temperatures and/or highly corrosive environments. In one exemplary aspect, a method of joining and sealing ceramic structures is disclosed. The method comprises forming a joint of a ceramic structure and an end plug using a sealing material, wherein the end plug has a hole that goes through a top surface and a bottom surface of the end plug; filling the ceramic structure with a desired gas composition through the hole; heating a material into a molten form using a heat source; and directing the material into the hole, wherein the material solidifies to seal the end plug.

公开(公告)号：US08748162B2

公开(公告)日：2014-06-10

申请号：US13973638

申请日：2013-08-22

Applicant: General Atomics

Inventor： David A. Hazlebeck ,  Jiping Zhang ,  Xiaoxi Wu

IPC: C12N1/12 ,  C12N1/00

CPC classification number: C12N1/12 ,  C12M21/02 ,  C12M23/02 ,  C12M29/12

Abstract: A system and method for using a pulse flow to circulate algae in an algae cultivation apparatus are provided. In order to counteract the negative effects of biofouling on algae cultivation equipment, a pulse flow is created to periodically move through an algae cultivation apparatus. The pulse flow will dislodge algae cells adhering to various surfaces of the apparatus, and it will also create turbulence to stir up any algae cells which may have settled onto the bottom of the apparatus. To produce an increased fluid flow rate required to create an effective pulse flow, a sump, which is periodically filled with drawn algal culture from the apparatus, is located at an elevated position above the apparatus. When released, the algal culture travels through a transfer pipe and into the apparatus with gravity causing the algal culture to flow at a very high rate.

Abstract translation: 提供了一种在藻类培养装置中使用脉冲流来循环藻类的系统和方法。 为了抵消生物污染对藻类栽培设备的负面影响，产生脉冲流，以周期性地移动通过藻类栽培设备。 脉冲流将移除附着在装置各个表面上的藻类细胞，并且还会产生湍流以搅动可能已经沉降到装置底部的任何藻类细胞。 为了产生产生有效脉冲流所需的增加的流体流速，从设备周期性地填充有拉脱藻培养物的贮槽位于装置上方的升高位置。 当释放时，藻类培养物通过输送管道传播并进入设备中，导致藻类培养物以非常高的速率流动。