公开(公告)号：US20160144423A1

公开(公告)日：2016-05-26

申请号：US14550094

申请日：2014-11-21

Applicant: General Electric Company

Inventor： Anthony Mark Thompson ,  James Anthony Brewer ,  Sylvia Marie DeCarr ,  Frederic Joseph Klug

IPC: B22C9/10 ,  B22C3/00

CPC classification number: B22C9/10 ,  B22C3/00

Abstract: Embodiments of the present invention include methods for forming ceramic articles, such as cores and core dies used in investment casting. The method may provide ceramic articles having improved strength and smoothness compared to articles manufactured by conventional methods. One embodiment is a method that comprises introducing a liquid comprising a silicon-bearing fluid into pores of a porous ceramic body; and heating the porous ceramic body in an oxygen-bearing atmosphere to form silica within the pores of the body.

Abstract translation: 本发明的实施例包括用于形成陶瓷制品的方法，例如用于熔模铸造的芯和芯模。 与通过常规方法制造的制品相比，该方法可以提供具有改善的强度和平滑度的陶瓷制品。 一个实施方案是一种方法，其包括将包含含硅流体的液体引入多孔陶瓷体的孔中; 并在含氧气氛中加热多孔陶瓷体以在体内孔内形成二氧化硅。

公开(公告)号：US10364189B2

公开(公告)日：2019-07-30

申请号：US15586390

申请日：2017-05-04

Applicant: General Electric Company

Inventor： Anthony Yu-Chung Ku ,  Xi Yang ,  Tao Li ,  John Patrick Pollinger ,  Zachary Kenneth Mowry ,  Frederic Joseph Klug

IPC: C04B35/185 ,  C04B41/53 ,  B28B1/24 ,  B28B11/24 ,  C04B35/64 ,  C04B41/00 ,  B28B7/42 ,  C04B41/80 ,  C22C9/10 ,  C04B111/00

Abstract: Methods for forming ceramic cores are disclosed. A ceramic core formed using the method of the present application includes a silica depletion zone encapsulating an inner zone. The inner zone includes mullite and the silica depletion zone includes alumina. The method includes heat-treating a ceramic body in a non-oxidizing atmospheric condition for an effective temperature and time combination at a pressure less than 10−2 atmosphere to form the silica depletion zone at a surface of the ceramic core.