While investigating the reaction of Si and C, using electron microprobe techniques, it was noted that, at 1500 to 1800C, the Si diffused into glassy C in a manner which was governed by bulk diffusion according to:

D (cm2/s) = 2.1 x 105exp[-125(kcal/mol)/RT]

Reaction of Si in Glassy Carbon. Suzuki, H., Kimura, S., Sasaki, T., Hase, T.: Nippon Genshiryoku Gakkaishi, 1971, 13[8], 440-6