کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5438749 | 1398187 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Growth kinetics of WC-Fe layer formed at the surface iron during solid-phase diffusion
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Tungsten carbide-reinforced iron-based surface composites were prepared via in situ solid-phase diffusion method; the variables included three temperatures (1085, 1100, and 1125 °C) and four heat treatment times (15, 45, 75, and 105 min). The samples were examined by X-ray diffraction, scanning electron microscopy, and Vickers hardness test. Results show that the tungsten carbide-reinforced iron-based surface composites consist of WC, α-Fe, W, and iron carbide phases, and the thickness of the WC-Fe layer ranges from 20.57±1.24 µm to 63.27±2.02 µm at 1085 °C. Furthermore, the maximum microhardness value of the WC-Fe layer at 1085 °C for 15 min is 2169 HV0.1, whereas that of the iron matrix is 239 HV0.1; such values demonstrate that the hardness of the composites are markedly enhanced. The kinetic of WC-Fe layer was analyzed by measuring the depth of pure WC layer as a function of heat treatment time and temperature. The results show a parabolic relationship between the thickness of pure WC layer and heat treatment time, and the activation energy for the pure WC layer was estimated to be 184.06 kJ molâ1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 42, Issue 15, 15 November 2016, Pages 16941-16947
Journal: Ceramics International - Volume 42, Issue 15, 15 November 2016, Pages 16941-16947
نویسندگان
Lisheng Zhong, Xi Zhang, Xin Wang, Yunhua Xu, Hong Wu, Yonghong Fu,