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Cyclic Oxidation of Ternary Layered Ti 2 AlC at 600–1000°C in Air
Author(s) -
Zhu Haiping,
Qian Xukun,
Wu Hongyu,
Lei Jun,
Song Yuchen,
He Xiaodong,
Zhou Yuan
Publication year - 2013
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.12182
Subject(s) - materials science , scanning electron microscope , kinetics , anatase , spallation , thermogravimetric analysis , substrate (aquarium) , ternary operation , atmospheric temperature range , thermal oxidation , chemical engineering , analytical chemistry (journal) , composite material , metallurgy , thermodynamics , catalysis , chemistry , silicon , oceanography , computer science , engineering , photocatalysis , quantum mechanics , programming language , physics , neutron , geology , biochemistry , chromatography
The cyclic oxidation of bulk Ti 2 AlC at intermediate temperatures of 600–1000°C in air was studied by thermogravimetric analysis. It was demonstrated that Ti 2 AlC exhibited good cyclic‐oxidation resistance at temperatures above 700°C. The cyclic‐oxidation kinetics approximately follows a parabolic rate law at 700–1000°C range. The surface scales are dense, resistant to spalling and adhesive to Ti 2 AlC substrate. An abnormal oxidation whose cyclic‐oxidation kinetics obeys a linear law is observed at 600°C. As revealed by scanning electron microscope ( SEM ), oxidation‐induced cracks present at 600°C results in poor protectivity and accounts for the abnormal oxidation. The cracks are caused by the stress associated with the volume expansion due the formation of anatase TiO 2 in the scale.
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