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Acta Metall Sin  2006, Vol. 42 Issue (7): 699-702     DOI:
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Phase transformation behaviour and kinetics of electrodeposition Ni-P amorphous alloys by X-ray analysis
HONG Bo; JIANG Chuanhai; WANG Xinjian; WU Jiansheng
Key Laboratory for High Temperature Materials and Tests of Ministry of Education; School of Materials Science and Engineering; Shanghai Jiaotong University;
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HONG Bo; JIANG Chuanhai; WANG Xinjian; WU Jiansheng. Phase transformation behaviour and kinetics of electrodeposition Ni-P amorphous alloys by X-ray analysis. Acta Metall Sin, 2006, 42(7): 699-702 .

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Abstract  Crystallization process in Ni-P amorphous alloy during continuous heating was investigated using in situ X-ray diffraction (XRD) analysis. The results show that different phosphorous content brings the difference of crystallization temperature and metastable phases transformed during continuous heating. Four metastable phases NiP、Ni2P、Ni12P5、Ni5P2 were detected in crystallization process. The activation energy of phase transformation and the crystallinity were calculated using dates of XRD gained from crystallization process. Activation energies of NiP(133±15kJ/mol), Ni2P(172±19kJ/mol) and Ni3P(190±20kJ/mol) were less than the crystallization activation energy of Ni-P amorphous alloy and the self-diffusion activation energy of nickel. This evidence supported that the formation of transformation phases was dominated not only atom-jumping or diffusion but also ordered cluster-shearing deposition.
Key words:  Ni-P amorphous film      crystallization process      in suit XRD      
Received:  08 August 2005     
ZTFLH:  TB383  

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https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y2006/V42/I7/699

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