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http://dx.doi.org/10.3795/KSME-A.2014.38.12.1435

Compressive Fracture Behavior of ATJ Graphite for Rocket Nozzle  

Choi, Hoon Seok (Dept. of Mechanical Design Engineering, Chungnam Nat'l Univ.)
Seo, Bo Hwi (Dept. of Mechanical Design Engineering, Chungnam Nat'l Univ.)
Kim, Jae Hoon (Dept. of Mechanical Design Engineering, Chungnam Nat'l Univ.)
Moon, Soon Il (Propulsive group, Agency for Defense Development)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.38, no.12, 2014 , pp. 1435-1440 More about this Journal
Abstract
The effects of the specimen size and temperature on the compressive strength of ATJ graphite were investigated. Compressive tests were conducted in accordance with ASTM C 965 at room temperature, $700^{\circ}C$ and $900^{\circ}C$. Three types of cylindrical specimen at room temperature were used in uniaxial tests, where the diameter-to - length ratios were one to two for the ASTM standard specimen, one to one for the Type I specimen, and one to 0.5 for the Type II specimen. Two kinds of cylindrical specimens, with and without antioxidant coating, were tested at elevated temperature. The Compressive strength of the expanded specimens(Type I, II) were slightly higher than that of standard specimen at room temperature. The compressive strength of a specimen with antioxidant coating increased as the temperature increased to $900^{\circ}C$. In contrast, that of the non-coated specimen decreases sharply due to the oxidation of the specimen.
Keywords
ATJ Graphite; Uniaxial Compression; Compressive Strength; Size Effect; Antioxidant;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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