Micro-Macro Simulation Method for Sintering Process and Control of Microstructure

烧结过程及微观组织控制的微观宏观模拟方法

• 批准号: 13650085
• 负责人: MORI Ken-ichiro
• 金额: $ 2.11万
• 依托单位: Toyohashi University of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650085/
• 关键词: micro-macro method; sintering; Monte Carlo method; viscoplastic finite element method; coupled method; diffusion; grain growth

A micro-macro method for simulating a sintering process of ceramic powder compacts based on the Monte Carlo and finite element methods is proposed. Macroscopic non-uniform shrinkage during the sintering is calculated by the viscoplastic finite element method. In the microscopic approach using the Monte Carlo method, powder particles and pores among the particles are divided into many cells, and the growth of grains in the particles and the disappearance of pores are simulated by means of the Potts model. The microscopic and macroscopic approaches are coupled by exchanging microscopic and macroscopic information in each step. In the Monte Carlo method, the effect of macroscopic plastic deformation on the microstructural change is taken into consideration by including plastic strain-rate calculated by the finite element method in the disappearance frequency of pore cells. The shrinkage behavior in the sintering of circular two-layer compacts is simulated by the proposed micro-macro method.

提出了一种基于Monte Carlo和有限元法的陶瓷粉末压坯烧结过程的细观-宏观模拟方法。用粘塑性有限元法计算了烧结过程中的宏观不均匀收缩。在使用Monte Carlo方法的微观方法中，将粉末颗粒和颗粒之间的孔隙划分为许多单元，并通过Potts模型来模拟颗粒中的晶粒的生长和孔隙的消失。通过在每个步骤中交换微观和宏观信息来耦合微观和宏观方法。在Monte Carlo方法中，通过将有限元法计算的塑性应变率包含在孔胞消失频率中，考虑了宏观塑性变形对微观结构变化的影响。采用所提出的细观-宏观方法模拟了圆形两层压坯烧结过程中的收缩行为。

项目成果

Manabu Umeda: "Finite element simulation of compaction and sintering of tiles having two layers of powders"Advances in Ceramic Matrix, Composites VIII. 59-70 (2002)

Manabu Umeda：“具有两层粉末的瓷砖的压实和烧结的有限元模拟”陶瓷基体的进展，复合材料 VIII。

森謙一郎: "モンテカルロ法と有限要素法の連成による焼結ミクロ-マクロシミュレーション"日本セラミックス協会学術論文集. 111巻7号(印刷中). (2003)

森健一郎：“蒙特卡罗法与有限元法耦合的烧结微观-宏观模拟”，日本陶瓷学会学术汇刊，第 111 卷，第 7 期（出版中）。

梅田学, 森謙一郎, 村上守人: "2層タイルの圧粉成形および焼結における材料特性の測定と有限要素シミュレーション"日本セラミックス協会学術論文集. 110巻9号. 844-851 (2002)

Manabu Umeda、Kenichiro Mori、Morito Murakami：“两层瓷砖压实和烧结过程中材料性能的测量和有限元模拟”，日本陶瓷学会学术汇刊，第 110 卷，第 9. 844-851 期（2002 年）。 ）

Manabu Umeda: "Finite Element Simulation of Powder Compaction with Rubber Punch and Sintering of Tiles having Two Layers"Journal of the Ceramic Society of Japan. 111-7(in press). (2003)

Manabu Umeda：“用橡胶冲头进行粉末压实和两层瓷砖烧结的有限元模拟”日本陶瓷学会杂志。

M.Umeda, K.Mori, M.Murakami: "Finite element simulation of compaction and sintering of tiles having two layers of powders"Advances in Ceramic Matrix, Composites VIII. 59-70 (2002)

M.Umeda、K.Mori、M.Murakami：“具有两层粉末的瓷砖的压实和烧结的有限元模拟”陶瓷基体的进展，复合材料 VIII。