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单体含量对凝胶注模工艺固化时内应力及坯体性能的影响
作者:金晓1 蔡锴2 刘炜1 董英鸽1 胡胜亮1 杨金龙2 
单位:1. 中北大学材料科学与工程学院 太原 030051 2. 清华大学材料科学与工程系 新型陶瓷与精细工艺国家重点实验室 北京 100084 
关键词:凝胶注模 单体含量 内应力 抗弯强度 氧化铝 
分类号:TQ17416
出版年,卷(期):页码:2011,39(5):62-66
DOI:
摘要:

在凝胶注模成型工艺中,单体含量对陶瓷浓悬浮体固化过程产生的应力和成型后陶瓷坯体的强度影响较大。通过自制的应力感应器测量凝胶注模工艺固化过程中Al2O3浆料从液相到固相转变过程中内应力的变化,系统研究不同有机单体含量对固化过程中内应力、素坯的力学性能和排胶后坯体开裂的影响,结果表明:有机物含量较高时,坯体的抗弯强度较大,在固化过程中会产生过大的应力,导致坯体排胶后产生裂纹的可能性增大。

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Monomer content can affect the internal stress during the solidification process and the properties of the green body by gelcasting. The internal stresses of Al2O3 slurries during the solidification process were measured by a self-made sensor. The influence of the monomer content on the internal stresses, mechanical properties and the cracking behavior of the green bodies after debindering were systematically investigated. The results show that although a higher monomer content can improve the flexural strength of the green body, however a larger internal stress is produced during the solidification process, which results in a higher probability of cracks produced in the green body after debindering.

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基金项目:
国家“863”计划(2008AA03Z507)及山西省科技攻关计划(20080321027)资助项目
作者简介:
硕士研究生
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参考文献:

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