کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1477109 991173 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Corrosion of selected ceramic materials in hot gas environment
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Corrosion of selected ceramic materials in hot gas environment
چکیده انگلیسی

The temperature dependence of the hot gas corrosion behaviour of various ceramic materials (Al2O3, ZrO2 (Y-TZP), mullite, ZrSiO4 and YAG) was investigated. The tests were performed in a high temperature burner rig at temperatures between 1200 °C and 1500 °C, a total pressure of 1 atm with a water vapour partial pressure of 0.24 atm, a gas flow velocity of 100 m/s and test times of about 130–300 h.ZrO2 (Y-TZP) showed absolutely no corrosion, however, a very high susceptibility to thermal shock and phase transformation was observed.The other materials suffered degradation above 1300 °C. This was the consequence of the formation and evaporation of volatile hydroxides (e.g. Si(OH)4 and Al(OH)3). YAG showed a low corrosion rate and the formation of a protective surface layer. The corrosion susceptibility of these materials was found to be higher with increasing temperature.Thermochemical calculations of the partial pressure of volatile species formed in reaction with water vapour, affirm the observed differences in corrosion behaviour.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 26, Issue 16, 2006, Pages 3557–3565
نویسندگان
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