Joining system without heating and pressing

无需加热和加压的连接系统

• 批准号: 10555244
• 负责人: ONZAWA Tadao
• 金额: $ 4.03万
• 依托单位: Tokyo Institute 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: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10555244/
• 关键词: adhesion; atomic force microscope; ultra high vacuum; molecular dynamics; chemical bond; interface; electronic spectroscopy; surface analysis; (1)凝着; (2)原子間力顕微鏡; (3)超高真空; (4)分子動力学; (5)結合状態; (6)界面; (7)電子分光; (8)表面分析

A force measurement system constructed in ultra high vacuum chamber of Auger electron spectroscope is used as a joining system without heating and pressing. The results are discussed with the continuum theory and the numerical analysis using molecular mechanics theory.Experiments were carried out in the elastic range. Samples were joined by adhesional interaction and the strength of joints were measured. It is same as the measurements of adhesional forces. After the measurements of adhesional forces, surfaces were observed by scanning electron microscope (SEM) and scanning Auger microscope (SAM).Although the atomic transfer between contacting samples was sometimes observed, there are some cases no transfer could observed by SAM. These results suggest the existence of exact reversible processes in Joining and Separation.In theoretical approach, theoretical strength of adhered object can be deduced by continuum theory. The solution is exact one and conventional theory and formula were found to be an approximation of it. At the limit when the size of atoms are not negligible, molecular mechanics becomes significant. The modified embedded atom method (MEAM) which is made for the bulk is found to have applicability to surface problems.

采用俄歇电子能谱仪超高真空室内构建的测力系统作为连接系统，无需加热和加压。利用连续介质理论和分子力学理论的数值分析对结果进行了讨论。在弹性范围内进行了实验。通过粘合相互作用连接样品并测量接头强度。它与粘附力的测量相同。测量粘附力后，通过扫描电子显微镜（SEM）和扫描俄歇显微镜（SAM）观察表面。虽然有时观察到接触样品之间的原子转移，但在某些情况下，SAM无法观察到转移。这些结果表明在连接和分离中存在精确的可逆过程。在理论方法中，粘附物体的理论强度可以通过连续介质理论来推导。该解是精确解，并且发现常规理论和公式是它的近似解。当原子尺寸不可忽略的极限时，分子力学就变得很重要。针对体相而设计的改进嵌入原子法（MEAM）被发现适用于表面问题。