scholarly journals Nanocrystalline SiC and Ti3SiC2 Alloys for Reactor Materials: Annual Report

2015 ◽  
Author(s):  
Charles H. Henager ◽  
Kyle J. Alvine ◽  
Timothy J. Roosendaal ◽  
Yongsoon Shin ◽  
Ba Nghiep Nguyen ◽  
...  
Keyword(s):  
Annual Report ◽  
Reactor Materials

The evolution of the microstructure of 600 Mev proton irradiated materials

1990 ◽  
Vol 48 (4) ◽  
pp. 1002-1003
Author(s):  
R. Gotthardt ◽  
A. Horsewell ◽  
F. Paschoud ◽  
S. Proennecke ◽  
M. Victoria
Keyword(s):  
Nuclear Reactions ◽  
Dislocation Loops ◽  
Defect Clusters ◽  
Weak Beam ◽  
Stacking Fault Tetrahedra ◽  
Small Defect ◽  
Sufficient Intensity ◽  
Reactor Materials ◽  
Metallic Impurities ◽  
Beam Technique

Fusion reactor materials will be damaged by an intense field of energetic neutrons. There is no neutron source of sufficient intensity at these energies available at present, so the material properties are being correlated with those obtained in irradiation with other irradiation sorces. Irradiation with 600 MeV protons produces both displacement damage and impurities due to nuclear reactions. Helium and hydrogen are produced as gaseous impurities. Other metallic impurities are also created . The main elements of the microstructure observed after irradiation in the PIREX facility, are described in the following paragraphs.A. Defect clusters at low irradiation doses: In specimens irradiated to very low doses (1021-1024 protons.m-2), so that there is no superimposition of contrast, small defect clusters have been observed by the weak beam technique. Detailed analysis of the visible contrast (>0.5 nm diameter) revealed the presence of stacking fault tetrahedra, dislocation loops and a certain number of unidentified clusters . Typical results in Cu and Au are shown in Fig. 1.

1999 Annual Report

2000 ◽  
Vol 10 (1) ◽  
pp. 6-6
Author(s):  
Eugene B. Cooper
Keyword(s):  
Annual Report

Annual Report of the Policy and Planning Board, 1996.

1997 ◽  
Vol 52 (8) ◽  
pp. 869-872
Author(s):  
No authorship indicated
Keyword(s):  
Annual Report ◽  
Planning Board ◽  
Policy And Planning
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