Functionalized Keggin- and Dawson-type cyclopentadienyltitanium heteropolytungstate anions: small, individually distinguishable labels for conventional transmission electron microscopy. 2. Reactions

1986 ◽  
Vol 108 (25) ◽  
pp. 7957-7963 ◽  
Author(s):  
John F. W. Keana ◽  
Marc D. Ogan ◽  
Yixin. Lu ◽  
Michael. Beer ◽  
J. Varkey
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Conventional Transmission Electron Microscopy ◽  
Transmission Electron

scholarly journals Applicability of Freeze-Fracture and Cryo-TEM to Complex Liquids

1992 ◽  
Vol 00 (7) ◽  
pp. 9-9
Author(s):  
Janet L. Burns ◽  
Richard J. Spontak
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Sample Preparation ◽  
Freeze Fracture ◽  
Traditional Methods ◽  
Conventional Transmission Electron Microscopy ◽  
Transmission Electron ◽  
Multicomponent Complex ◽  
Complex Liquids

Traditional methods of sample preparation and analysis in conventional transmission electron microscopy (TEM) are not readily applicable to multicomponent complex liquids which may contain a wealth of microstructural information. Two techniques which facilitate the study of structure in such liquids are freeze-fracture (FF) TEM and cryo-TEM.

Observation of Dislocation Cutting Ω Phase and its Strengthening Mechanism in an Al-Cu-Mg-Ag Alloy

1997 ◽  
Vol 3 (2) ◽  
pp. 139-145 ◽  
Author(s):  
Bernard Q. Li ◽  
Franklin E. Wawner
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Strengthening Mechanism ◽  
The Other ◽  
Step Height ◽  
Conventional Transmission Electron Microscopy ◽  
Ω Phase ◽  
Transmission Electron ◽  
High Resolution Tem

Abstract: This investigation presents the interaction of dislocations and semicoherent precipitates (Ω phase) in an Al-Cu-Mg-Ag alloy. The study shows that the semicoherent precipitate is cut by dislocations during deformation. Conventional transmission electron microscopy (TEM) and high resolution TEM (HRTEM) observations demonstrate that shearing of precipitates by dislocations occurs by multiple cutting in the precipitate. The step height caused by cutting on the Ω precipitate is only several atomic layers of the Ω phase. The Ω phase is strengthened after shearing by dislocations. A strengthening mechanism is proposed on the basis of this observation. The strengthening mechanism is not only applicable to the Ω precipitate in Al-Cu-Mg-Ag alloys but also to the other semicoherent precipitates in other alloys.

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