کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1613999 | 1516323 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Room and high temperature toughening in directionally solidified B4C-TiB2 eutectic composites by Si doping
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Directionally solidified Ð4С-TiB2 eutectics doped with different Si contents were prepared by floating zone method. Silicon doping (up to 3 vol.%) promotes a more coherent interface between B4C matrix and TiB2 inclusions, a decrease of the spacing between TiB2 (when solidification rate is constant), and formation of a more uniform morphology with thinner inclusions. These features lead to simultaneous enhancement of Vickers hardness (HV), fracture toughness (K1c) and bending strength (Ï) when compared with Si-free Ð4С-TiB2 eutectics. For our materials, the average HV, K1c and Ï were 45.2 GPa, 7.04 MPa m1/2, and 460 MPa at room temperature or 487 MPa at 1600 °C, respectively. The values of Ï at indicated temperatures are approximately twice higher than for the Si-free Ð4С-TiB2 eutectic composites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 570, 5 September 2013, Pages 94-99
Journal: Journal of Alloys and Compounds - Volume 570, 5 September 2013, Pages 94-99
نویسندگان
Iurii Bogomol, Petre Badica, Yiqiang Shen, Toshiyuki Nishimura, Petro Loboda, Oleg Vasylkiv,