Thermokinetic study on the phase evolution of mechanically alloyed Ni–B powders

被引：0
作者：
Masoud Nazarian-Samani
Ali Reza Kamali
Mahboobeh Nazarian-Samani
Roohallah Mobarra
Saber Naserifar
机构：
[1] K.N. Toosi University of Technology (KNTU),Advanced Materials and Nanotechnology Research Center (AMNRC), Faculty of Mechanical Engineering
[2] University of Cambridge,Department of Materials Science and Metallurgy
[3] Semnan University,Department of Materials Science and Engineering
[4] University of Southern California (USC),Mork Family Department of Chemical Engineering and Materials Science
来源：
Journal of Thermal Analysis and Calorimetry | 2012年 / 107卷
关键词：
Ni–B intermetallics; Nanostructured materials; Heat treatment; Thermal analysis; Mechanical alloying;
D O I：
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中图分类号：
学科分类号：
摘要：
A combination of differential thermal analysis and detailed X-ray diffraction (XRD) analyses were used for the thermokinetic study of phase evolution during heating–cooling of the mechanically alloyed (MA-ed) Ni–15 wt% B. According to the results obtained, different phase transition sequences led to the formation of nanocrystalline Ni–B alloys comprising of Ni2B + o-Ni4B3 and Ni2B + m-Ni4B3 + B. Using the XRD studies, it was found that the Ni2B is the most stable intermetallic compound in the Ni–B binary phase diagram, and its nanocrystalline nature retained unchanged even after annealing up to temperatures near the melting point. In addition, average enthalpy as well as activation energy of occurred reactions was calculated; the latter was estimated using two well-known Kissinger and Augis & Bennett methods.
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页码：265 / 269
页数：4
相关论文
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