Effect of steam oxidation on strength, elastic modulus, and strain at fracture of graphite 2020. [HTGR]

Technical Report · Thu Dec 01 04:00:00 EST 1977

DOI:https://doi.org/10.2172/5242445· OSTI ID:5242445

Velasquez, C; Hightower, G; Burnette, R

Stackpole Carbon's graphite grade 2020, a candidate material for support posts in GA HTGRs, was oxidized in steam-helium mixtures to 25 wt % burnoff. The effects of the oxidation on ultimate strength, elastic modulus, and strain at fracture are reported. A large number of nonoxidized and oxidized tensile specimens were tested to failure. Average losses of 6.7 wt % in strength and 7.4 wt % in elastic modulus at 1% burnoff were obtained. No significant change in strain at fracture was observed for burnoffs up to 5%. The elastic modulus and ultimate tensile strength of the oxidized samples correlated with bulk density.

• Research Organization: General Atomic Co., San Diego, Calif. (USA)
• DOE Contract Number: EY-76-C-03-0167-017
• OSTI ID: 5242445
• Report Number(s): GA-A-14651
• Country of Publication: United States
• Language: English

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