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Citation: LI Ning, GAO Cheng-Hui, YANG Su-Zhen. Crystallization Kinetics of Electrodeposited Amorphous/Nanocrystalline Ni_81.32Mo_18.68 Alloy Coating[J]. Acta Physico-Chimica Sinica, ;2009, 25(04): 735-740. doi: 10.3866/PKU.WHXB200904031 shu

Crystallization Kinetics of Electrodeposited Amorphous/Nanocrystalline Ni_81.32Mo_18.68 Alloy Coating

1.
College of Mechanical Engineering & Automation, Fuzhou University, Fuzhou 350002, P. R. China

Received Date: 20 October 2008
Available Online: 26 December 2008

An electrodeposited Ni-Mo alloy coating with 18.68% (atomic fraction) Mo content was obtained in an alkaline nickel carbonate solution. It was found from X-ray diffraction (XRD) that the deposition was composed of amorphous and nanocrystalline phases and compounds. Crystallization dynamics fromdifferential scanning calorimetry (DSC) showed that the deposition crystallization activation energy (E) was about 3.84×105 kJ·mol-1 and the crystallization temperature was 440 ℃. Compared with amorphous Ni-Mo alloy depositions, the deposition crystallization temperature was increased by about 13 ℃. It was found from the heat treatment process that a small amount of nanocrystallines in the deposition could prevent the possibility of crystallization and improve the thermal stability and increase the crystallization temperature of the co-composite. New phases would take on in the deposited Ni81.32Mo18.68 alloy during the heat treatment process when annealed at 450 ℃. This improved the density of the deposition coating and prevented a change in the amorphous phase. The thermal stability of the co-deposited coating was also improved.
- Amorphous/nanocrystalline,
- Ni-Mo alloy,
- Crystallization kinetics,
- Electrodeposition
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Crystallization Kinetics of Electrodeposited Amorphous/Nanocrystalline Ni81.32Mo18.68 Alloy Coating

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Crystallization Kinetics of Electrodeposited Amorphous/Nanocrystalline Ni_81.32Mo_18.68 Alloy Coating