کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1475502 1510144 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High-temperature thermal stability of Ti2AlN and Ti4AlN3: A comparative diffraction study
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
High-temperature thermal stability of Ti2AlN and Ti4AlN3: A comparative diffraction study
چکیده انگلیسی

The susceptibility of Ti2AlN and Ti4AlN3 to high-temperature thermal dissociation in a dynamic environment of high-vacuum has been investigated using in situ neutron diffraction. Under high vacuum, these ternary nitrides decomposed above 1400 °C through the sublimation of Al, and possibly Ti, to form a surface coating of TiNx (0.5 ≤ x ≤ 0.75). The kinetics of isothermal phase decomposition were modelled using the Avrami equation and the Avrami exponents (n) of isothermal decomposition of Ti2AlN and Ti4AlN3 were determined to be 0.62 and 0.18, respectively. The characteristics of thermal stability and phase transitions in Ti2AlN and Ti4AlN3 are compared in terms of the rate of decomposition, phase relations and microstructures.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 31, Issues 1–2, January–February 2011, Pages 159–166
نویسندگان
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