scholarly journals Closure to “Discussion of ‘A New Method for Etching Surfaces of Bearings and Other Machine Elements’” (1980, ASME J. Lubr. Technol., 102, p. 400)

1980 ◽  
Vol 102 (3) ◽  
pp. 400-401
Author(s):  
G. G. Hirs ◽  
J. IJ. Sonneveld
Keyword(s):  
New Method ◽  
Machine Elements

A New Method for Etching Surfaces of Bearings and Other Machine Elements

1980 ◽  
Vol 102 (3) ◽  
pp. 395-400 ◽  
Author(s):  
G. G. Hirs ◽  
J. IJ. Sonneveld
Keyword(s):  
Flow Velocity ◽  
Etching Rate ◽  
Theoretical Work ◽  
New Method ◽  
Curved Surfaces ◽  
Sliding Bearings ◽  
Photochemical Etching ◽  
Machine Elements ◽  
Template Design ◽  
Made In

The method relates to the production of shallow recesses in surfaces by etching. Recesses in metal surfaces are particularly suitable for use in sliding bearings for rotating components and in some other machine elements. Frequently, such recesses have a depth of 10 microns or more and are made in the form of intricate groove patterns on curved surfaces. According to the new method, etching fluid is caused to flow by means of a flow guiding template onto areas determined by this template along the surface to be etched. The etching rate on the areas to be etched is controlled by adjustment of the flow velocity of the etching fluid and the slit height of the flow guiding template. The recesses or grooves are deeper when the flow velocity of the etching fluid and the slit height are both higher. The paper gives a brief description of the new etching method and a comparison with other fabrication methods such as photochemical etching and electro-chemical machining. The new method appears to be preferable to others for large series production. The paper concludes with theoretical work in which the etching process is explained in terms of mass transfer by connective diffusion and with some experimental results using a simplified flow guiding template design.

Selective Sampling and Orientation of Non-Homogeneous Tissues

1968 ◽  
Vol 26 ◽  
pp. 98-99
Author(s):  
C. C. Clawson ◽  
L. W. Anderson ◽  
R. A. Good
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Light Microscopy ◽  
Random Sampling ◽  
New Method ◽  
Microscope Examination ◽  
Small Areas ◽  
Selective Sampling ◽  
Large Numbers ◽  
Specific Orientation

Investigations which require electron microscope examination of a few specific areas of non-homogeneous tissues make random sampling of small blocks an inefficient and unrewarding procedure. Therefore, several investigators have devised methods which allow obtaining sample blocks for electron microscopy from region of tissue previously identified by light microscopy of present here techniques which make possible: 1) sampling tissue for electron microscopy from selected areas previously identified by light microscopy of relatively large pieces of tissue; 2) dehydration and embedding large numbers of individually identified blocks while keeping each one separate; 3) a new method of maintaining specific orientation of blocks during embedding; 4) special light microscopic staining or fluorescent procedures and electron microscopy on immediately adjacent small areas of tissue.

A new method for the determination of nitrates

1960 ◽  
Vol 23 ◽  
pp. 227-232 ◽  
Author(s):  
P WEST ◽  
G LYLES
Keyword(s):  
New Method
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