Thermal evolution of high-purity and boron-doped sub-microcrystalline Ni3Al produced by severe plastic deformation |
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| Affiliation: | 1. Institute of Metals Superplasticity Problems, Russian Academy of Sciences, 450001 Ufa, Russia;2. CECM, CNRS, 94407 Vitry-sur-Seine Cedex, France;3. Institute of Physics of Advanced Materials, Ufa State Aviation University, 450000 Ufa, Russia;1. Guangxi Key Laboratory for Relativistic Astrophysics, Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology, College of Physics Science and Technology, Guangxi University, Nanning 530004, PR China;2. Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, PR China;1. Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology, Guangxi Novel Battery Materials Research Center of Engineering Technology, School of Physical Science and Technology, Guangxi University, Nanning, 530004, PR China;2. Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, PR China;1. State Key Laboratory of Tribology, School of Mechanical Engineering, Tsinghua University, Beijing 100084, China;2. Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;1. Faculty of Science and Engineering, Chuo University, Bunkyo-ku, Tokyo 112-8551, Japan;2. Faculty of Engineering, Kogakuin University, Hachioji, Tokyo 192-0015, Japan;3. Graduate School of Fine Arts, Tokyo University of the Arts, Taito-ku, Tokyo 110-8714, Japan;4. Faculty of Engineering, Yamagata University, Yonezawa 992-8510, Japan;1. Institute of Physics of Materials AS CR, v.v.i., Zizkova 22, CZ-61662, Brno, Czech Republic;2. CEITEC-Institute of Physics of Materials, AS CR, Zizkova 22, CZ-61662, Brno, Czech Republic |
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| Abstract: | The influence of boron on the structural stability of sub-microcrystalline Ni3Al intermetallic compounds was investigated by comparing a high-purity material with a boron-doped (0.1 wt%) compound. The nanocrystalline structure was obtained by severe shear deformation under quasi-hydrostatic pressure. Residual electrical resistivity, Vickers microhardness, X-ray diffraction and transmission electron microscopy were used to characterize the material evolution during thermal treatments in the temperature range 293–1313 K. After severe deformation the materials were disordered, with a small crystallite size of about 20 nm, similar in both materials. During isochronal anneals, the evolution of the microstructure, the long-range ordering and the recovery of the investigated properties took place at higher temperatures in the boron-doped compound, i.e. the thermal stability of the cold-worked structure was higher. |
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