کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1581168 | 1514856 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fabrication and toughening of NbCr2 matrix composites alloyed with Ni obtained by powder metallurgy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
NbCr2 Laves phase intermetallics with or without Ni were successfully synthesized by mechanical alloying (MA) and hot pressing (HP) techniques. The mechanical alloyed powders were vacuum hot-pressed at 1250 °C for 0.5 h. The fracture toughness at room temperature was measured by Anstis' mode and the responded microstructures were analyzed by using scanning electronic microscopy (SEM) and X-ray diffraction (XRD). The results show that the addition of Ni could obviously toughen the matrix. When the content of Ni in NbCr2 is about 5 at.%, the fracture toughness value increases by about 30% more than that of pure NbCr2. The corresponding toughening mechanisms depend on the following: Ni replacing Cr, solid solution toughening, fine-grain, crack deflection, crack microbridging, crack bowing and branching.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 502, Issues 1â2, 25 February 2009, Pages 85-90
Journal: Materials Science and Engineering: A - Volume 502, Issues 1â2, 25 February 2009, Pages 85-90
نویسندگان
Xiao-wu Nie, Shi-qiang Lu, Ke-Lu Wang, Tong-cai Chen, Chun-lin Niu,