Rheology of grain-boundary sliding and grain interlocking

晶界滑动和晶粒互锁的流变学

• 批准号: 09450243
• 负责人: SAKAI Mototsugu
• 金额: $ 6.85万
• 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 (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09450243/
• 关键词: ceramics; grain-boundary; creep; stress relaxation; superplasticity; high-temperature rheology; indentation mechanics; セラミック; 多結晶セラミックス; 粒界すべり; 粒間拘束

(1) A novel rheological test system which operates at high temperatures (ranging from 500 to 1300 degree centigrade) was designed and constructed.(2) Theoretical considerations and quantitative derivations were made for the viscoelastic constitutive equations of polycrystals with grain-boundary melt-phase in various types of multiaxial stress/strain fields. The equations include the elastic deformation of respective polycrystalline grains, as well as viscous flow of melt-phase in grain channels.(3) A novel microstructural model for the superplastic deformation of refractory grain aggregates was proposed. The importance of cooperative motions of groups of grains in an aggregate was emphasized to be essential for including a large-scale deformation under tension/compression. An important theoretical prediction for a size-effect law in superplastic deformation was made.(4) Various types of rheological test were conducted by the use of ZrO2-ceramics, and the test results were related to the microscopic processes and mechanisms of grain-boundary Zener-relaxation, grain interlocking, cooperative grain-boundary sliding.(5) Time-dependent viscoelastic surface deformation produced by a pyramidal indentation was theoretically examined to derive a constitutive equation for a microscopic surface contact.(6) A novel indentation test system that operates at elevated temperatures (from 300 to 1500 degree centigrade) was designed, constructed, and applied to rheologically testing various types of inorganic glasses above their glass transition points.

（1）设计和构建了一种新型的流变测试系统，该系统在高温下（500至1300度）进行了工作。（2）理论考虑和定量衍生物是针对多种类型的多种类型的多种类型的多种类型的多种类型的多种型融合层的多晶的粘晶构晶体方程。该方程包括各自的多晶晶粒的弹性变形，以及晶粒通道中熔融相的粘性流。强调，在张力/压缩下包括大规模变形至关重要。 （4）通过使用ZRO2-陶瓷进行了各种类型的流变学检验，对尺寸效应定律进行了重要的理论预测，测试结果与晶粒 - 固定型植物互锁，晶粒互锁，合作的粒子构造相关的晶粒 - 边界型的晶粒 - 结合型（5）时间相关（5）相关（5）。理论上检查了锥体凹痕，以推导微观表面接触的本构方程。（6）在高温下（从300摄氏度到1500度到1500度）在其上设计，构造并应用于流浪学测试各种类型的无机玻璃杯上方的玻璃玻璃过渡点。

项目成果

M.Sakai: "Grain-Boundary Sliding and Grain Interlocking in the Viscoelastic Deformation of Two-Phase Ceramics." Ceramic Transaction of American Ceramic Soc.(1998)

M.Sakai：“两相陶瓷粘弹性变形中的晶界滑动和晶粒互锁”。

M. Sakai, S. Shimizu, and T. Ishikawa: "The indentation load-depth curve of ceramics"J. Mater. Res.. 14[4]. 1471-1484 (1999)

M. Sakai，S. Shimizu，T. Ishikawa：“陶瓷的压痕载荷-深度曲线”J。

M. Sakai and H. Muto: "Rheology of grain-boundary sliding and grain interlocking at high temperatures"Key Eng. Mater. 161. 25-30 (1999)

M. Sakai 和 H. Muto：“高温下晶界滑动和晶粒互锁的流变学”Key Eng。

M. Sakai, H. Muto,: "Novel Deformation Process in an Aggregate : A Candidate for Superplastic Deformation"Scripta Materialia. 38[6]. 901-915 (1998)

M. Sakai，H. Muto，：“骨料中的新颖变形过程：超塑性变形的候选者”Scripta Materialia。

H. Muto and M. Sakai: "Rheology of grain boundary sliding in polycrystalline ceramics -creep and stress relaxation-"J. Ceram, Soc. JPN. 105[4]. 329-334 (1997)

H. Muto 和 M. Sakai：“多晶陶瓷中晶界滑动的流变学 - 蠕变和应力松弛 -”J。