A technique for preparing iron-copper composite materials for transmission electron microscopy

Metallography ◽  
1971 ◽  
Vol 4 (2) ◽  
pp. 169-170 ◽  
Author(s):  
R.A. Spurling
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Composite Materials ◽  
Iron Copper ◽  
Transmission Electron ◽  
Copper Composite

Comparative Microstructures of Ion Milled and Electrochemically Thinned Composite Materials

1974 ◽  
Vol 32 ◽  
pp. 546-547
Author(s):  
R.R. Russell
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Composite Materials ◽  
Great Difficulty ◽  
Ion Milling ◽  
Transmission Electron ◽  
Ion Damage ◽  
Intermetallic Composite

Transmission electron microscopy of metallic/intermetallic composite materials is most challenging since the microscopist typically has great difficulty preparing specimens with uniform electron thin areas in adjacent phases. The application of ion milling for thinning foils from such materials has been quite effective. Although composite specimens prepared by ion milling have yielded much microstructural information, this technique has some inherent drawbacks such as the possible generation of ion damage near sample surfaces.

Nano-Composite Materials Studied by CTEM and STEM

2007 ◽  
Vol 121-123 ◽  
pp. 991-994 ◽  
Author(s):  
Jian Bo Wang ◽  
Lu Ying Li ◽  
Zhe Liu ◽  
Ren Hui Wang
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Composite Materials ◽  
Scanning Transmission Electron Microscopy ◽  
Multiwall Carbon Nanotubes ◽  
Nano Composite ◽  
Carbon Nanohorns ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Multiwall Carbon

Various techniques in conventional transmission electron microscopy (CTEM) and scanning transmission electron microscopy (STEM) are applied to characterize comprehensively the microstructures of the nano-composite materials, including Cu2O quantum dots deposited on multiwall carbon nanotubes (CNTs) and Fe particles encapsulated in carbon nanohorns (CNHs) as two studying cases.

Structural Characterisation of Iron-Copper Multilayers Using Transmission Electron Microscopy

1994 ◽  
Vol 367 ◽  
Author(s):  
S. J. Lloyd ◽  
R. E. Somekh ◽  
R.E. Dunin-Borkowski ◽  
W. M. Stobbs
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Tetragonal Distortion ◽  
Elastic Behaviour ◽  
Structural Characterisation ◽  
Iron Copper ◽  
Transmission Electron

AbstractCoherent iron-copper multilayers of a wavelength of 2.5nm that were measured to be nonmagnetic were structurally characterised using high resolution and Fresnel techniques. A measurement of the tetragonal distortion from layer to layer and as a whole would allow an assessment of the degree to which the material exhibits any anomaly in its elastic behaviour. The modelling of the distortions requires however the measurement of the abruptness of the interfaces and this requires the quantification of the Fresnel contrast. The degree to which the measurements can be obtained to the required accuracies is considered.

Structure and Thermoelectric Properties Correlation in half-Heusler ZrNiSn- based Bulk Nano-composite Materials by Transmission Electron Microscopy

2010 ◽  
Vol 1267 ◽  
Author(s):  
Dinesh Misra ◽  
Julien Pierre Amelie Makongo Mangan ◽  
Michael R. Shabetai ◽  
Girija Shankar Chaubey ◽  
John Wiley ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Composite Materials ◽  
Thermoelectric Properties ◽  
Powder Diffraction ◽  
Phase Identification ◽  
Nano Composite ◽  
X Ray ◽  
Transmission Electron

AbstractWe report the effects of HfO2 nanoparticles as inclusion to the Zr0.5Hf0.5Ni0.8Pd0.2Sn0.99Sb0.01 half-Heusler matrix on the thermoelectric properties. X-ray powder diffraction and transmission electron microscopy were employed for the phase identification and microstructure characterization of the composites. The transport properties are mainly discussed with regards to the microstructure details.

Techniques for Transmission Electron Microscopy of Fiber-Matrix Interfaces in Aluminum Alloy-Boron Composites by Ion Erosio

1971 ◽  
Vol 29 ◽  
pp. 204-205
Author(s):  
G. G. Shaw
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Aluminum Alloy ◽  
Electron Beam ◽  
Pure Aluminum ◽  
Ion Milling ◽  
Transmission Electron ◽  
Fiber Matrix ◽  
Ion Erosion ◽  
Row Of Fibers

The morphology and composition of the fiber-matrix interface can best be studied by transmission electron microscopy and electron diffraction. For some composites satisfactory samples can be prepared by electropolishing. For others such as aluminum alloy-boron composites ion erosion is necessary.When one wishes to examine a specimen with the electron beam perpendicular to the fiber, preparation is as follows: A 1/8 in. disk is cut from the sample with a cylindrical tool by spark machining. Thin slices, 5 mils thick, containing one row of fibers, are then, spark-machined from the disk. After spark machining, the slice is carefully polished with diamond paste until the row of fibers is exposed on each side, as shown in Figure 1.In the case where examination is desired with the electron beam parallel to the fiber, preparation is as follows: Experimental composites are usually 50 mils or less in thickness so an auxiliary holder is necessary during ion milling and for easy transfer to the electron microscope. This holder is pure aluminum sheet, 3 mils thick.

Direct Observation of Heat Exchanger Deposits by Cross Sectioning

1967 ◽  
Vol 25 ◽  
pp. 364-365
Author(s):  
R. W. Anderson ◽  
D. L. Senecal
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Heat Exchanger ◽  
Direct Observation ◽  
Cross Sections ◽  
Preparation Method ◽  
Specimen Preparation ◽  
Flowing Water ◽  
Transmission Electron ◽  
Deposit Layer

A problem was presented to observe the packing densities of deposits of sub-micron corrosion product particles. The deposits were 5-100 mils thick and had formed on the inside surfaces of 3/8 inch diameter Zircaloy-2 heat exchanger tubes. The particles were iron oxides deposited from flowing water and consequently were only weakly bonded. Particular care was required during handling to preserve the original formations of the deposits. The specimen preparation method described below allowed direct observation of cross sections of the deposit layers by transmission electron microscopy.The specimens were short sections of the tubes (about 3 inches long) that were carefully cut from the systems. The insides of the tube sections were first coated with a thin layer of a fluid epoxy resin by dipping. This coating served to impregnate the deposit layer as well as to protect the layer if subsequent handling were required.

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