Metal-oxide surge arrester operating limits defined by a temperature-margin concept

1990 ◽  
Vol 5 (2) ◽  
pp. 627-633 ◽  
Author(s):  
G. St-Jean ◽  
A. Petit
Author(s):  
T. G. Gregory

A nondestructive replica technique permitting complete inspection of bore surfaces having an inside diameter from 0.050 inch to 0.500 inch is described. Replicas are thermally formed on the outside surface of plastic tubing inflated in the bore of the sample being studied. This technique provides a new medium for inspection of bores that are too small or otherwise beyond the operating limits of conventional inspection methods.Bore replicas may be prepared by sliding a length of plastic tubing completely through the bore to be studied as shown in Figure 1. Polyvinyl chloride tubing suitable for this replica process is commercially available in sizes from 0.037- to 0.500-inch diameter. A tube size slightly smaller than the bore to be replicated should be used to facilitate insertion of the plastic replica blank into the bore.


Author(s):  
R.A. Ploc

The manner in which ZrO2 forms on zirconium at 300°C in air has been discussed in the first reference. In short, monoclinic zirconia nucleates and grows with a preferred orientation relative to the metal substrate. The mode of growth is not well understood since an epitaxial relationship which gives minimum misfit between the zirconium ions in the metal/oxide combination is not realized. The reason may be associated with a thin cubic or tetragonal layer of ZrO2 between the inner oxygen saturated metal and the outer monoclinic zirconia.


Nanoscale ◽  
2020 ◽  
Vol 12 (15) ◽  
pp. 8065-8094 ◽  
Author(s):  
Xudong Wen ◽  
Jingqi Guan

Different kinds of electrocatalysts used in NRR electrocatalysis (including single atom catalysts, metal oxide catalysts, nanocomposite catalysts, and metal free catalysts) are introduced.


1999 ◽  
Vol 09 (PR8) ◽  
pp. Pr8-65-Pr8-72 ◽  
Author(s):  
A. E. Turgambaeva ◽  
V. V. Krisyuk ◽  
A. F. Bykov ◽  
I. K. Igumenov
Keyword(s):  

1985 ◽  
Vol 46 (C4) ◽  
pp. C4-135-C4-140 ◽  
Author(s):  
M. Leseur ◽  
B. Pieraggi

1990 ◽  
Vol 51 (C1) ◽  
pp. C1-781-C1-787
Author(s):  
B. BONVALOT ◽  
G. DHALENNE ◽  
F. MILLOT ◽  
A. REVCOLEVSCHI

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