کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7973124 | 1514624 | 2018 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
In-situ TiB2-NiAl composites synthesized by arc melting: Chemical reaction, microstructure and mechanical strength
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
TiB2 particles (5â¯vol% and 10â¯vol%) reinforced NiAl matrix composites were fabricated in-situ from Ti-B-Ni-Al system by arc melting. The reaction mechanism and mechanical properties of the composites were studied. When the reaction system was heated to 917â¯K, Ni and Al reacted with Ti to form the transient phase AlNi2Ti, which continued to react with B to yield ultrafine TiB2 particles acting as reinforcement agent. The apparent activation energy for these two reactions were calculated and found to be 497.99â¯kJ/mol and 2354.78â¯kJ/mol, respectively. The reinforcement agent exerted dispersion strengthening effect on the matrix. The room temperature compressive strength of the composites reinforced by 10â¯vol% of TiB2 particles was determined to be 538.3â¯MPa, representing a 35.2% increase over NiAl alloy. To further refine the grain size, the rare earth element cerium (2â¯wt% and 4â¯wt%) was introduced to the composites. The compressive strength of the composites containing 4â¯wt% Ce was determined to be 571.1â¯MPa, representing a 43.5% increase over NiAl alloy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 719, 14 March 2018, Pages 140-146
Journal: Materials Science and Engineering: A - Volume 719, 14 March 2018, Pages 140-146
نویسندگان
Heng Zhang, Heguo Zhu, Jiewen Huang, Jianliang Li, Zonghan Xie,