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Insight into the corrosion failure of mullite thermal insulation materials in carbon monoxide
Author(s) -
Xiang Ruofei,
Li Yuanbing,
Li Shujing,
Xue Zhengliang,
Wang Hailu
Publication year - 2021
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13795
Subject(s) - mullite , materials science , thermal shock , creep , composite material , carbon monoxide , corundum , corrosion , compressive strength , ceramic , microstructure , thermal insulation , carbon fibers , reducing atmosphere , metallurgy , catalysis , composite number , biochemistry , chemistry , layer (electronics)
The service condition of mullite thermal insulation materials is complicated, the effects of carbon deposition are always considered the primary cause of damage to mullite ceramic in carbon monoxide atmosphere. In the present study, mullite thermal insulation material was subjected to a carbon monoxide atmosphere at 1100°C–1400°C. The thermodynamics stability, phase composition, and microstructure of the mullite thermal insulation material were analyzed. Furthermore, the effects of carbon monoxide corrosion on thermal shock resistance and compressive creep behavior at high temperatures were evaluated. The carbon content in the mullite‐based insulation material is below 0.02% after treatment at 1100°C–1400°C. After treatment at 1400°C, most areas in the specimen comprised corundum and glass phase, and K, Na, Ca, Mg, and Fe were detected as impurities, leading to the improvement of cold crushing strength after 20 thermal shocks but a remarkable recession in high‐temperature compressive creep.