陶瓷零件低温挤压自由成形工艺挤压过程及液相迁移

中国机械工程

陶瓷零件低温挤压自由成形工艺挤压过程及液相迁移

闫存富1,2;李淑娟1;杨磊鹏1;何龙飞1;杨振朝1

1.西安理工大学，西安,710048
2.黄河科技学院，郑州，450063

出版日期:2016-08-25 发布日期:2016-08-17
基金资助:
国家重点基础研究发展计划（973计划）资助项目(2009CB724406)；陕西省自然科学基础研究计划资助项目（2015JQ5182）；陕西省教育厅专项科研计划资助项目（14JK1515）；郑州市科技攻关项目（20140754）

Liquid Phase Migration and Freeze-form Extrusion Fabrication of Aqueous Ceramic Paste

Yan Cunfu1,2;Li Shujuan1;Yang Leipeng1;He Longfei1;Yang Zhenchao1

1.Xi'an University of Technology,Xi'an，710048
2.Huanghe College of Science and Technology,Zhengzhou，450063

Online:2016-08-25 Published:2016-08-17
Supported by:

摘要/Abstract

摘要： 水基陶瓷膏体低温挤压自由成形过程中，液相迁移对挤压过程和成形件的性能有重要影响。将挤压过程分为压实阶段、过渡阶段及稳定挤压阶段，基于Benbow-Bridgwater模型推导出各阶段的挤压力方程。采用单因素试验法研究了挤出速度、间隔时间和挤出喷嘴直径对水基陶瓷膏体挤压过程中液相迁移的影响。试验结果表明，增大挤压速度，采用大直径挤出喷嘴，缩短间隔时间，均能有效减小挤压过程中的液相迁移，提高成形质量。

关键词: 水基陶瓷膏体, 低温挤压自由成形, 单因素试验, 液相迁移

Abstract: During the aqueous ceramic paste freeze-form extrusion fabrication process, liquid phase migration had important effects on extrusion proces and the part performances. The extrusion process was divided into 3 stages, i.e.compaction stage, transition stage and stable extrusion stage. The extrusion pressure equation which included the shear forces between the barrel inner wall and the extrusion paste was derived based on Benbow-Bridgwater model. The influences of extrusion speed, interval time and nozzle diameter on liquid phase migration were studied attentively through single factor experiments. The results show that the longer interval time, the more serious the liquid phase migration, the higher extrusion speed and the bigger diameter of extrusion nozzle may reduce liquid phase migration and improve the forming efficiency.

Key words: aqueous ceramic paste, freeze-form extrusion fabrication, single factor experiment;liquid phase migration

中图分类号:

TB330.1

闫存富, 李淑娟, 杨磊鹏, 何龙飞, 杨振朝. 陶瓷零件低温挤压自由成形工艺挤压过程及液相迁移[J]. 中国机械工程.

Yan Cunfu, Li Shujuan, Yang Leipeng, He Longfei, Yang Zhenchao. Liquid Phase Migration and Freeze-form Extrusion Fabrication of Aqueous Ceramic Paste[J]. China Mechanical Engineering.

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