کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9803964 1516476 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Formation of titanium nitride by mechanical milling and isothermal annealing of titanium and boron nitride
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Formation of titanium nitride by mechanical milling and isothermal annealing of titanium and boron nitride
چکیده انگلیسی
The formation of titanium nitride with rock salt structure (δ-TiNx) was studied by mechanical milling of a mixture of Ti and hexagonal boron nitride (h-BN) powders and isothermal annealing of the mixture after milling for 70 h under argon atmosphere. The mole ratio of Ti to h-BN is 22:78. In the milling process, an amorphous Ti-N alloy was formed firstly by a diffusion reaction between Ti and BN, and then the amorphous Ti-N alloy transformed into δ-TiNx driven by mechanical milling. However, in the annealing process, a Ti(N) solid solution was formed firstly by incorporation of N into Ti, and the N content in the Ti(N) increased with increasing annealing temperature. When the N content exceeded the solubility limit of the Ti(N) at some annealing temperature, the Ti(N) decomposed into δ-TiNx and Ti(N) with the solubility limit. No self-sustaining reaction occurs in the present work. No TiB2 is observed to form in the two processes. The thermodynamic and kinetic mechanisms of formation of the δ-TiNx are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 391, Issues 1–2, 5 April 2005, Pages 77-81
نویسندگان
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