公开(公告)号：US09908818B2

公开(公告)日：2018-03-06

申请号：US15027705

申请日：2014-09-24

Applicant: United Technologies Corporation

Inventor： Andi M. Limarga ,  Paul Sheedy ,  Wayde R. Schmidt ,  Douglas M. Berczik ,  Tania Bhatia Kashyap ,  Mark A. Hermann

IPC: C04B35/571 ,  C04B35/58 ,  C04B35/80

CPC classification number: C04B35/571 ,  C04B35/58 ,  C04B35/806 ,  C04B2235/3821 ,  C04B2235/383 ,  C04B2235/3852 ,  C04B2235/386 ,  C04B2235/3865 ,  C04B2235/3873 ,  C04B2235/422 ,  C04B2235/425 ,  C04B2235/427 ,  C04B2235/5244 ,  C04B2235/5288 ,  C04B2235/5454 ,  C04B2235/616

Abstract: Disclosed is a method for providing a crystalline ceramic material. In an example, the method includes providing a silicon-containing preceramic polymer material that can be thermally converted to one or more crystalline polymorphs. The silicon-containing preceramic polymer material includes dispersed therein an effective amount of dopant particles. The silicon-containing preceramic polymer material is then thermally converted to the silicon-containing ceramic material. The effective amount of dopant particles enhance the formation of at least one of the one or more crystalline polymorphs, relative to the silicon-containing preceramic polymer without the dopant particles, with respect to at least one of formation of a selected polymorph of the one or more crystalline polymorphs formed, an amount formed of a selected polymorph of the one or more crystalline polymorphs formed, and a temperature of formation of the one or more crystalline polymorphs.

公开(公告)号：US20160243722A1

公开(公告)日：2016-08-25

申请号：US15026094

申请日：2014-09-29

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： Shahram Amini ,  Wayde R. Schmidt ,  Tania Bhatia Kashyap ,  Mark A. Hermann ,  Paul Sheedy ,  Andi M. Limarga ,  Michael G. McCaffrey

IPC: B28B1/24 ,  C04B38/00 ,  B28B1/52

CPC classification number: B28B1/24 ,  B28B1/52 ,  B28B11/243 ,  C04B35/524 ,  C04B35/532 ,  C04B35/806 ,  C04B38/0022 ,  C04B2235/48 ,  C04B2235/5252 ,  C04B2235/602 ,  C04B2235/616

Abstract: A disclosed method of forming a ceramic article includes forming a pre-ceramic polymer article within a mold tool, and performing a first pyrolizing step on the initial pre-ceramic polymer article to form a ceramic article. The method further includes performing at least one pre-heat treatment polymer infiltration and pyrolizing (PIP) cycle on the ceramic article and an initial heat treatment cycle of the ceramic article after the at least one pre-heat treatment PIP cycle. Subsequent PIP cycles and heat treatment cycles are performed in combination to form a ceramic article including a desired density.

Abstract translation: 公开的形成陶瓷制品的方法包括在模具工具内形成预陶瓷聚合物制品，并在初始预陶瓷聚合物制品上进行第一热解步骤以形成陶瓷制品。 该方法还包括在至少一个预热处理PIP循环之后，在陶瓷制品上进行至少一个预热处理聚合物浸渍和热解（PIP）循环和陶瓷制品的初始热处理循环。 随后的PIP循环和热处理循环组合进行以形成包括所需密度的陶瓷制品。