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首页> 外文期刊>Journal of Materials Research >Relation between coarsening and densification in solid-state sintering of ceramics: Experimental test on superfine zirconia powder compacts
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Relation between coarsening and densification in solid-state sintering of ceramics: Experimental test on superfine zirconia powder compacts

机译：陶瓷固态烧结中粗化与致密化的关系：超细氧化锆粉体的实验测试

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摘要

Coarsening (including grain growth and pore growth) and densification behavior of superfine Y-TZP and YSZ powder compacts in the intermediate stage were investigated. It has been found that grain growth in the compacts is basically not affected by the compaction properties, and pore growth is driven by both grain growth and densification. Grain growth alone leads to size-proportional pore growth, and densification results in pore shrinkage. The relation between grain size and density is analyzed to be linear when grain growth and densification are believed to be driven by different stresses under an identical diffusion process. Both theoretical and experimental results show that compaction properties and the heating rate do not alter this linear relation between grain size and density but influence the slope of the linear relation. Larger dihedral angle, higher green density, and narrower particle and pore size distributions are found favorable for the achievement of the grain size-density trajectory with promoted densification and minimized grain growth.
机译：研究了超细Y-TZP和YSZ粉末压块在中间阶段的粗化（包括晶粒生长和孔生长）和致密化行为。已经发现，压坯中的晶粒生长基本上不受压实性能的影响，而孔的生长则由晶粒生长和致密化共同驱动。仅晶粒生长会导致尺寸成比例的孔增长，而致密化则会导致孔收缩。当认为晶粒生长和致密化是由相同的扩散过程中的不同应力驱动时，晶粒大小与密度之间的关系被分析为线性。理论和实验结果均表明，压实性能和加热速率不会改变晶粒尺寸与密度之间的线性关系，而是会影响线性关系的斜率。发现较大的二面角，较高的生坯密度以及较窄的颗粒和孔径分布有利于实现具有促进的致密化和最小化晶粒生长的晶粒尺寸-密度轨迹。

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  • 来源
    《Journal of Materials Research》 |1999年第4期|1389-1397|共9页
  • 作者

    J. L. Shi;

  • 作者单位
  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
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