کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1475847 991131 2010 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Oxidation resistance and strength retention of ZrB2–SiC ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Oxidation resistance and strength retention of ZrB2–SiC ceramics
چکیده انگلیسی

Oxidation behavior and effect of oxidation on the room-temperature flexural strength were investigated for ZrB2–10 vol% SiC (ZB10S) and ZrB2–30 vol% SiC (ZB30S) in air at 1500 °C with times ranging from 0.5 h to 10 h. The oxide scale of both ZB10S and ZB30S was composed of an outer glassy layer and an inner extended SiC-depleted layer. The changes in weight gain, glass layer thickness, and extended SiC-depleted layer thickness with oxidation were measured. Analysis suggested that the extended SiC-depleted layer was most indicative for evaluating the oxidation resistance. Compared to the ZB10S, the improved oxidation resistance in ZB30S was attributed to the viscosity increase of glassy layer and the lower number of ZrO2 inclusions in the glassy layer. Because of the healing of surface flaws by the glassy layer, the strength increased significantly by ∼110% for ZB10S and by ∼130% for ZB30S after oxidation for 0.5 h.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 30, Issue 11, August 2010, Pages 2387–2395
نویسندگان
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