论文部分内容阅读
Crystallisation kinetic and phase transformation behaviour of the electroless nickel-phosphorus deposit with 6-9wt% phosphorus content were studied. The deposit was heated in the differential scanning calorimetry (DSC) apparatus to 300℃-800℃ at 20℃/min, followed by the X-ray diffraction (XRD) analysis. The sequence of crystallisation process was: mixture of amorphous and microcrystalline nickel phases → intermediate metastable, f. c. c. nickel and stable N13P phases → f. c. c. nickel and stable Ni3P phases. Preferred orientation of nickel {200} plane was developed after the heating processes. Activation energy of crystallisation process was determined from the DSC analyses at 5-50℃/min. Crystallisation temperatures were found increased with increasing heating rate.
Crystallisation kinetic and phase transformation behavior of the electroless nickel-phosphorus deposit with 6-9 wt% phosphorus content were studied. The deposit was heated in the differential scanning calorimetry (DSC) apparatus to 300-800 ° C at 20 ° C / min, followed by The X-ray diffraction (XRD) analysis. The sequence of crystallisation process was: mixture of amorphous and microcrystalline nickel phases → intermediate metastable, fcc nickel and stable N13P phases → fcc nickel and stable Ni3P phases. Preferred orientation of nickel {200} plane was developed after the heating processes. Activation energy of crystallisation process was determined from the DSC analyzes at 5-50 ° C / min. Crystallisation temperatures were found increased with increasing heating rate.