402
M. Malathi et al.
a)
b)
c)
a)
b)
c)
1.1.
a)
b)
c)
(a)
(b)
(c)
Fig. 5 (a) Photograph of NiP 5 g/lt SiC at 50 cycles per minute, (b) 100 cycles per minute and (c)
150 cycles per minute. (b) Photograph of NiP 50 g/lt SiC at (a) 50 cycles per minute, (b) 100 cycles
per minute and (c) 150 cycles per minute. (c) Photograph of NiP 100 g/lt SiC at (a) 50 cycles per
minute, (b) 100 cycles per minute and (c) 150 cycles per minute
SEM/EDAX analysis shows that the incorporation of SiC is better with an increase
in concentration of SiC and dunking speed. However, agglomeration is observed, and
this may be improved by additional air agitation in the electroplating bath.
3.4 X-Ray Diffraction
The precipitation of nickel phosphide (Ni3P) and composite SiC material is
confirmed by subjecting the heat treated piston ring at 300 °C for two hours to
XRD analysis as given in Fig. 7.
M. Malathi et al.
a)
b)
c)
a)
b)
c)
1.1.
a)
b)
c)
(a)
(b)
(c)
Fig. 5 (a) Photograph of NiP 5 g/lt SiC at 50 cycles per minute, (b) 100 cycles per minute and (c)
150 cycles per minute. (b) Photograph of NiP 50 g/lt SiC at (a) 50 cycles per minute, (b) 100 cycles
per minute and (c) 150 cycles per minute. (c) Photograph of NiP 100 g/lt SiC at (a) 50 cycles per
minute, (b) 100 cycles per minute and (c) 150 cycles per minute
SEM/EDAX analysis shows that the incorporation of SiC is better with an increase
in concentration of SiC and dunking speed. However, agglomeration is observed, and
this may be improved by additional air agitation in the electroplating bath.
3.4 X-Ray Diffraction
The precipitation of nickel phosphide (Ni3P) and composite SiC material is
confirmed by subjecting the heat treated piston ring at 300 °C for two hours to
XRD analysis as given in Fig. 7.