2013 Fiscal Year Final Research Report
Direct observation of sintering mechanics of a single grain boundary
| Project/Area Number |
23360319
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Material processing/treatments
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
WAKAI Fumihiro 東京工業大学, 応用セラミックス研究所, 教授 (30293062)
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| Co-Investigator(Kenkyū-buntansha) |
AKATSU Takashi 東京工業大学, 応用セラミックス研究所, 准教授 (40231807)
SHINODA Yutaka 東京工業大学, 応用セラミックス研究所, 助教 (30323843)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 焼結 / セラミックス / 粒界拡散 / 粒界エネルギー / 異方性 / 表面拡散 / 連続体力学 |
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| Research Abstract |
Shrinkage in sintering is the result of the motion of many particles, which interact with their neighbors. A method to analyze the mechanics of sintering of a single grain boundary was developed by using specimens fabricated by focused ion beam micro-machining (FIB). This method determined the grain boundary energy and the grain boundary energy which are dependent on crystallographic orientation. The microscopic sintering force acting between two particles was used to develop the concept of sintering stress tensor in macroscopic continuum mechanics of sintering. This model predicted the effect of the local microstructure on anisotropic shrinkage, and the tensor virial equation of evolving surfaces in sintering of aggregates of particles was proposed.
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