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Oxidation Behavior of Silicon‐Infiltrated Carbon/Carbon Composites in High‐Enthalpy Convective Environment
Author(s) -
Ogasawara Toshio,
Ishikawa Takashi
Publication year - 2001
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2001.tb00877.x
Subject(s) - enthalpy , composite material , materials science , graphite , silicon , composite number , carbon fibers , metallurgy , thermodynamics , physics
Thermal response and oxidation behavior of commercial metal‐silicon‐infiltrated carbon/carbon composites (MICMAT TM ; Si‐CC) were evaluated in a high‐enthalpy convective environment using an arc jet facility (an arc wind tunnel). Composite specimens were put into a supersonic plasma air stream having a gas enthalpy of 12.7–18.8 MJ/kg for 50–600 s. Cold‐wall heat fluxes measured by a Gardon‐type calorimeter ranged from 1.0 to 1.8 MW/m 2 , and the maximum surface temperature reached 1300°–1660°C. After the arc jet testing, no surface recession was observed in the samples, and the mass loss rate of the composites was far less than that of graphite. The excellent oxidation resistance was caused by formation of a porous SiC layer at the surface of the composite. Oxidation behavior of the composites is discussed based on a simplified airflow blocking model of the porous SiC layer. The composites exhibited excellent oxidation resistance for short‐term exposure in high‐enthalpy airflow.