Growth in solution of hooked Ni–Fe fibers by oriented rotation and attachment approaches |
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作者姓名: | Yong Zhang Fang Liu Wei-ze Zhang |
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作者单位: | School of Materials Science and Engineering, Dalian Jiaotong University, Dalian, 116028, China |
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基金项目: | This work was financially supported by the Project of Education Department of Liaoning Province, China;the National Natural Science Foundation of China |
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摘 要: | Inspired by the curved branches of fractal trees, hooked Ni–Fe fibers were grown in situ in Ni–Fe composite coatings on a spheroidal graphite cast iron substrate. These hooked Ni–Fe fibers exhibited inclination angles of about 39°, which was in accordance with the theoretical prediction of 37°. Ni–Fe nanostructures self-assembled to form dendrites and evolved into hooked fibers by an oriented attachment reaction. The orientation rotation of Ni–Fe nanostructures played an important role in the growth of curved hooked Ni–Fe fibers. During sliding wear tests, the volume loss of the spheroidal graphite cast iron substrate was 2.2 times as large as that of the Ni–Fe coating reinforced by hooked fibers. The good load-transferring ability of hooked Ni–Fe fibers led to an improvement in their wear properties during wear tests.
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关 键 词: | metal fiber fiber growth oriented attachments composite coatings self assembly nanostructures |
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