|
On a starch layer, no common feature was found; some results showed three phases,
while others did not. In the group of results having three phases, mB
ranges from 0.11 to 0.15. These values are nearly equal to the
values for group
in which S-type disks were used.
In the case for silica sand, the sliding process
could hardly be observed for the same reason described in section 5.1. m*
in this case ranges from 0.61 to 0.73.
|
Fig. 19. Friction coefficient versus basal pressure of the disk.
|
:on dogtooth violet starch layer with
disk having smooth metal surface |
|
:on dogtooth violet starch layer with
disk having a base in which dogtooth violet starch
is fixed with spray paste. (mB) |
 |
:(for reference) on flour layer
with S-type (mB) |
Fig. 20. Friction coefficient versus basal pressure of the disk.
 |
:on silica sand layer with disk having
smooth metal surface (m*) |
 |
:on silica sand layer with disk having a
base in which silica sand is fixed with spray paste. (m*) |
|
:(for reference) on flour layer with
S-type (mB) |
 |
:(for reference) without flour layer |
|
