Figure 8 shows the effect of surface roughness by atomic force microscopy AFM found that the mirror blank with a surface roughness of 0.76 nm
, when a spark with titanium wire without heat. As a roughness rose to 17.37 nm
when heating the specimen found that roughness is higher up again. If the oven is equal to 23.74 nm
are blowing hot air for 5 minutes, close to the workpiece is not heated, but after 10 minutes, the roughness of the workpiece to a higher value,
but returned. tends to decrease as the time to add time to blow hot air up
probably because of the heat in a long time, causing the particle film is tight, the higher the roughness of the surface is reduced.
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