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材料工程  2016, Vol. 44 Issue (8): 93-97    DOI: 10.11868/j.issn.1001-4381.2016.08.015
  测试与表征 本期目录 | 过刊浏览 | 高级检索 |
含短切玻璃纤维的水玻璃精铸涂料的流变性
马海焦1,2, 刘向东1,2, 吕凯1,2, 张慧1,2, 孟山旦1,2
1. 内蒙古工业大学 材料科学与工程学院, 呼和浩特 010051;
2. 内蒙古工业大学 内蒙古自治区材料成型及控制工程重点实验室, 呼和浩特 010051
Rheological Behavior of Slurries Containing Short Glass Fibers for Preparation of Investment Casting Shell
MA Hai-jiao1,2, LIU Xiang-dong1,2, LYU Kai1,2, ZHANG Hui1,2, MENG Shan-dan1,2
1. School of Materials Science and Engineering, Inner Mongolia University of Technology, Huhhot 010051, China;
2. Key Laboratory of Materials Processing & Control Engineering of Inner Mongolia Autonomous Region, Inner Mongolia University of Technology, Huhhot 010051, China
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摘要 将占耐火粉料0%~0.5%(质量分数)的短切玻璃纤维加入到制壳用涂料中,配制纤维增强水玻璃型壳用涂料。采用R/S流变仪测试不同纤维加入量条件下涂料的流变性,研究短切玻璃纤维加入量对涂料流变性的影响规律。结果表明:含纤维涂料的表观黏度随着剪切速率的增大而逐渐减小,且均具有剪切稀化的特性,其变化规律与不含纤维的涂料相似。含纤维涂料表观黏度值均高于不含纤维涂料;在相同剪切速率下,含0.3%纤维的涂料表观黏度值均高于其他涂料。随着短切玻璃纤维加入量的增大,涂料的高剪黏度值先增加后减小。含0.3%短切玻璃纤维涂料的高剪黏度值最大,约为102.6×10-3Pa·s,比不含纤维的涂料增大约31.9%;且该涂料的触变环面积达到最大值11.8Pa·s-1,触变性好。未发现短切玻璃纤维的加入对涂料的屈服值及悬浮性有显著影响。
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马海焦
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吕凯
张慧
孟山旦
关键词 短切玻璃纤维涂料流变性精铸型壳    
Abstract:The short glass fibers were introduced into the slurries by 0%-0.5% (mass fraction of refractory powders) for preparation of fiber-reinforced shells for investment casting. The rheological properties of coatings containing different amounts of glass fibers were measured by R/S rheometer and the rheological behaviors of coatings were investigated. The results show that the apparent viscosities of coatings containing different amounts of glass fibers decrease with increasing shear rate, i.e., shear thinning behavior, similar to that of the coating without fibers. At the same shear rate, the apparent viscosities of coatings containing fibers are higher than that of the coating without fibers and the apparent viscosities of coatings containing 0.3% (mass fraction) fibers are higher than that of the others. The high shear viscosities of coatings containing fibers increase initially, but later decrease, with increasing amount of fibers. The high shear viscosity of the coating containing 0.3% fibers reaches a maximum value of 102.6×10-3Pa·s, increased by about 31.9%, in comparison to the coating without fibers. And this coating with a maximum thixotropical loop area value of 11.8Pa·s-1 exhibits an excellent thixotropical behavior. However, it is not found that there is a noticeable effect of the amount of glass fibers on the yield stress or suspensibility of coatings.
Key wordsshort glass fiber    slurry    rheological behavior    investment casting shell
收稿日期: 2015-01-15      出版日期: 2016-08-23
中图分类号:  TG249.5  
通讯作者: 刘向东(1966-),男,教授,博士生导师,从事专业:液态金属成型基础理论与技术,联系地址:内蒙古自治区呼和浩特市新城区爱民街49号内蒙古工业大学材料科学与工程学院(010051),liuxd@imut.edu.cn     E-mail: liuxd@imut.edu.cn
引用本文:   
马海焦, 刘向东, 吕凯, 张慧, 孟山旦. 含短切玻璃纤维的水玻璃精铸涂料的流变性[J]. 材料工程, 2016, 44(8): 93-97.
MA Hai-jiao, LIU Xiang-dong, LYU Kai, ZHANG Hui, MENG Shan-dan. Rheological Behavior of Slurries Containing Short Glass Fibers for Preparation of Investment Casting Shell. Journal of Materials Engineering, 2016, 44(8): 93-97.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.08.015      或      http://jme.biam.ac.cn/CN/Y2016/V44/I8/93
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