Diagenetic Overprinting and Rock Fabric Distribution: The Cementation, Compaction, and Selective Dissolution Environment

Author(s):  
F. Jerry Lucia
Author(s):  
John D. Rubio

The degradation of steam generator tubing at nuclear power plants has become an important problem for the electric utilities generating nuclear power. The material used for the tubing, Inconel 600, has been found to be succeptible to intergranular attack (IGA). IGA is the selective dissolution of material along its grain boundaries. The author believes that the sensitivity of Inconel 600 to IGA can be minimized by homogenizing the near-surface region using ion implantation. The collisions between the implanted ions and the atoms in the grain boundary region would displace the atoms and thus effectively smear the grain boundary.To determine the validity of this hypothesis, an Inconel 600 sample was implanted with 100kV N2+ ions to a dose of 1x1016 ions/cm2 and electrolytically etched in a 5% Nital solution at 5V for 20 seconds. The etched sample was then examined using a JEOL JSM25S scanning electron microscope.


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Vol 110 (1) ◽  
pp. 25-42 ◽  
Author(s):  
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Jean-Claude Dran ◽  
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Author(s):  
Shanshan Yan ◽  
Liyang Wan ◽  
Yejian Xue ◽  
Yan Wang ◽  
Guangjie Shao ◽  
...  

Perovskites are promising catalysts for metal-air batteries because of their excellent intrinsic catalytic activities. However, the low specific surface area and less surface defects lead to low catalytic activities regarding...


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Author(s):  
Liufang Ni ◽  
Changmei Lin ◽  
Hui Zhang ◽  
Hai Huang ◽  
Qidu Deng ◽  
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Dongjun Song ◽  
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1987 ◽  
Vol 18 (3) ◽  
pp. 367-382 ◽  
Author(s):  
R.J. Ragozzini ◽  
G.J. Sparrow

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