کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7919968 | 1511485 | 2018 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High-pressure strength and compressibility of titanium diboride (TiB2) studied under non-hydrostatic compression
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The high-pressure strength and plastic properties of titanium diboride (TiB2) were investigated using synchrotron angle-dispersive x-ray diffraction (AXRD) under non-hydrostatic compression up to 42â¯GPa in a diamond-anvil cell (DAC). The AXRD data yielded a bulk modulus K0â¯=â¯308â¯Â±â¯10â¯GPa with a pressure derivative Kâ²0â¯=â¯3.4â¯Â±â¯1. The experimental data are discussed and compared to the results of first-principles calculations. The compressibility of TiB2 demonstrates a strongly anisotropic property with increasing pressure. In addition, the microscopic deviatoric stress and grain size (crystallite size) were determined as a function of pressure from the line-width analysis. We can seen that the strength increases while the crystalline size decreases steeply as the pressure is raised from ambient to about 22â¯GPa. In other words, TiB2 starts to yield a plastic deformation at around 22â¯GPa, and the yield strength of TiB2 increases with pressure, reaching a value of â¼27â¯GPaâ¯at the highest pressure in our experiment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 121, October 2018, Pages 256-260
Journal: Journal of Physics and Chemistry of Solids - Volume 121, October 2018, Pages 256-260
نویسندگان
Hao Liang, Haihua Chen, Fang Peng, Lingxiao Liu, Xin Li, Kui Liu, Chuangqi Liu, Xiaodong Li,