Development of specialized lines with automatic carbon-potential control for carburizing drill-bit lugs and cutters

1982 ◽  
Vol 18 (7) ◽  
pp. 273-274
Author(s):  
N. M. Buslovich ◽  
�. Ya. Makhtinger ◽  
F. S. Poloiko ◽  
Yu. G. Osipov
Keyword(s):  
Carbon Potential ◽  
Drill Bit ◽  
Potential Control

A sintering furnace with carbon potential control of protective atmosphere

1977 ◽  
Vol 16 (9) ◽  
pp. 731-736
Author(s):  
A. K. Gaiduchenko ◽  
A. F. Zhornyak ◽  
A. N. Krivenko ◽  
I. D. Radomysel'skii
Keyword(s):  
Carbon Potential ◽  
Protective Atmosphere ◽  
Potential Control

Imaging molecules adsorbed onto electrodes under potential control by scanning probe microscopy

1991 ◽  
Vol 49 ◽  
pp. 376-377 ◽  
Author(s):  
N.J. Tao ◽  
J.A. DeRose ◽  
P.I. Oden ◽  
S.M. Lindsay
Keyword(s):  
Surface Charge ◽  
Environmental Effects ◽  
Scanning Probe Microscopy ◽  
Statistical Significance ◽  
Electrochemical Methods ◽  
Surface Structures ◽  
Scanning Probe ◽  
Potential Control ◽  
Afm Imaging ◽  
Special Circumstances

Clemmer and Beebe have pointed out that surface structures on graphite substrates can be misinterpreted as biopolymer images in STM experiments. We have been using electrochemical methods to react DNA fragments onto gold electrodes for STM and AFM imaging. The adsorbates produced in this way are only homogeneous in special circumstances. Searching an inhomogeneous substrate for ‘desired’ images limits the value of the data. Here, we report on a reversible method for imaging adsorbates. The molecules can be lifted onto and off the substrate during imaging. This leaves no doubt about the validity or statistical significance of the images. Furthermore, environmental effects (such as changes in electrolyte or surface charge) can be investigated easily.

Preparation of cross-sectional samples for near-surface TEM studies

1987 ◽  
Vol 45 ◽  
pp. 380-381
Author(s):  
R.C. Dickenson ◽  
K.R. Lawless
Keyword(s):  
Standard Sample ◽  
Surface Region ◽  
Specimen Preparation ◽  
Thick Sheet ◽  
Drill Bit ◽  
Sample Holder ◽  
Metal Interface ◽  
Cross Sectional ◽  
Near Surface ◽  
Cold Worked

In thermal oxidation studies, the structure of the oxide-metal interface and the near-surface region is of great importance. A technique has been developed for constructing cross-sectional samples of oxidized aluminum alloys, which reveal these regions. The specimen preparation procedure is as follows: An ultra-sonic drill is used to cut a 3mm diameter disc from a 1.0mm thick sheet of the material. The disc is mounted on a brass block with low-melting wax, and a 1.0mm hole is drilled in the disc using a #60 drill bit. The drill is positioned so that the edge of the hole is tangent to the center of the disc (Fig. 1) . The disc is removed from the mount and cleaned with acetone to remove any traces of wax. To remove the cold-worked layer from the surface of the hole, the disc is placed in a standard sample holder for a Tenupol electropolisher so that the hole is in the center of the area to be polished.

Reservoir Characterization Begins at First Contact with the Drill Bit

2011 ◽  
Author(s):  
Sara Shayegi ◽  
C. Shah Kabir ◽  
Flemming If ◽  
Soren Christiansen ◽  
Ken Kosco ◽  
...  
Keyword(s):  
Reservoir Characterization ◽  
Drill Bit ◽  
First Contact
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