作者：PING XIN;

作者单位：Research & Development Center, Toshiba Ceramics Co., Ltd. 30, Soya, Hadano-shi, Kanagawa-ken, 257-8566

刊名：Journal of the Technical Association of Refractories

ISSN：0285-0028

出版年：2003-01-05

卷：23

期：2

起页：120

止页：126

分类号：TQ175

语种：英文

关键词：

内容简介

As the powder compaction process in manufacturing of refractories and other ceramic parts is increasing required in forming compacts with near net shape and high quality controlled, prediction of the deformation of the powder under compaction becomes important. It is so difficult to specifically deal with interactions of ceramic particles, binders and aids composed the powder, that evaluation of macroscopic deformation of the powder based on the continuum mechanics with assumption of uniformly distributed voids has to be made for engineering technologies. The constitutive equations, such as the yield criteria, the relationship of stress and strain and elastic coefficients of the powder and compact, essentially needed by prediction of the deformation of the powder, must be evaluated by a particular experiment method. A method proposed by Xin et al.using uniaxial pressing in a cylindrical die is simple and practical for establishing the constitutive equations of powder. The finite element method is an effective tool for us to implement the prediction of powder deformation under compaction with taking the compressibility represented in the deformation properties obtained previous into account. As an example, an analysis of the CIP forming process for the submerged nozzle, an important refractory for steel continuous casting, was demonstrated using the finite element method.