کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1475662 991125 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mechanical properties of Al2O3–Cr2O3/Cr3C2 nanocomposite fabricated by spark plasma sintering
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Mechanical properties of Al2O3–Cr2O3/Cr3C2 nanocomposite fabricated by spark plasma sintering
چکیده انگلیسی

The fine grains of Al2O3–Cr2O3/Cr-carbide nanocomposites were prepared by employing recently developed spark plasma sintering (SPS) technique. The initial materials were fabricated by a metal organic chemical vapor deposition (MOCVD) process, in which Cr(CO)6 was used as a precursor and Al2O3 powders as matrix in a spouted chamber. The basic mechanical properties like hardness, fracture strength and toughness, and the nanoindentation characterization of nanocomposites such as Elastics modulus (E), elastic work (We) and plastic work (Wp) were analyzed. The microstructure of dislocation, transgranular and step-wise fracture surface were observed in the nanocomposites. The nanocomposites show fracture toughness of (4.8 MPa m1/2) and facture strength (780 MPa), which is higher than monolithic alumina. The strengthening mechanism from the secondary phase and solid solution are also discussed in the present work. Nanoindentation characterization further illustrates the strengthening of nanocomposites.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 32, Issue 1, January 2012, Pages 77–83
نویسندگان
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