Journal
RARE METAL MATERIALS AND ENGINEERING
Volume 50, Issue 10, Pages 3512-3519Publisher
NORTHWEST INST NONFERROUS METAL RESEARCH
Keywords
transition metal phosphides; Ni-P; microstructure; multistage pore; phase extraction
Funding
- Natural Science Foundation of Shandong Province [ZR2019MEM019]
- National Natural Science Foundations of China [51772132]
- Shandong Province Higher Educational Youths Innovative Science and Technology Program [2019KJA018]
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By controlling the solidification behavior and phase extraction process, Ni-P particles with multistage pore structure can be obtained, in which the pores are formed due to the etching of Cu dendrites and Cu existing in eutectic structure and solid solution region. Phase extraction from metallic alloys provides a new controllable method to synthesize functional multistage porous phosphides.
Cu-Ni-P alloys with different atomic ratios of Ni: P (2: 1, 3: 1, 4: 1 and 5: 1) were designed, and the microstructure characteristics and phase extraction treatments of ingots and melt-spun ribbons were discussed. Results show that Cu-xNi-4.5P ingots are composed of Cu and multiple Ni-P phases, including Ni5P4, Ni12P5, and Ni3P. With melt-spun process, the phosphides mainly exist in the form of Ni12P5 and Ni3P compounds. Meanwhile, further increasing nickel concentration of alloys can cause the structure-coarsening of phosphides in some degree. By controlling the solidification behavior and phase extraction process, Ni-P particles with multistage pore structure can be obtained, in which the pores are formed due to the etching of Cu dendrites and Cu existing in eutectic structure and solid solution region. Thus, phase extraction from metallic alloys provides a new controllable method to synthesize functional multistage porous phosphides.
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