Abstract
The BNL proton microprobe has been used to study migration of molybdenum through reactor grade graphite for temperatures between 1800 and 3100°C. The proton microprobe, with a resolution between 25 and 150 micrometers, provides a unique tool for investigation of the lower temperature and shorter time heatings along with investigation of the microstructure of the system. With a high sensitivity, on the order of 1 ppm, particular attention was paid to the region governed by pore and grain boundary diffusion. The results obtained with the proton microprobe are compared with results obtained using wet chemical techniques.
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