کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1689763 | 1518955 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Crystallization kinetics and spark plasma sintering of amorphous Ni53Nb20Ti10Zr8Co6Ta3 powders prepared by mechanical alloying
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
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چکیده انگلیسی
Amorphous Ni53Nb20Ti10Zr8Co6Ta3 powders were successfully fabricated by mechanical alloying. The glass-forming ability and crystallization behavior of the synthesized alloy powders were investigated by X-ray diffraction, transmission electron microscopy and differential scanning calorimetry. The non-isothermal crystallization kinetics were analyzed by the Johnson-Mehl-Avrami equation. The crystallization of the amorphous Ni53Nb20Ti10Zr8Co6Ta3 powders exhibits two distinct steps, and the values of the Avrami exponent n implies that the crystallization of the first and second steps are dominated by interface-controlled three-dimensional growth as well as the volume-diffusion-controlled two-dimensional growth, respectively. In addition, the bulk crystallized alloys consolidated from the amorphous powders by spark plasma sintering exhibit high fracture strength of 3169Â MPa and ultra-high hardness of 1069Â HV. The compressive fracture strength and fracture strain of the as sintered alloy at 1073Â K reach 2020Â MPa and 7.6%, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 114, April 2015, Pages 93-100
Journal: Vacuum - Volume 114, April 2015, Pages 93-100
نویسندگان
Xiaoqiang Li, Zhun Cheng, Ke Hu, Huojin Chen, Chao Yang,