DETERMINATION OF THIN FILM'S MECHANICAL PROPERTIES

19
between 700 o C and the boriding temperature (800 to 1000 o C) should be high in
order to minimize the formation of FeB (R. Chatterjee, 1989).
Figure 2.8 Diagram showing the influence of the B 4 C
content of the boriding powder on the Proportion of
FeB phase in the boride layer of various steels borided
with pack powder at 900 o C (R. Chatterjee, 1976).
Figure 2.9 Effect of pack boriding temperature and time
on the boride layer thickness in C45 (Asm Handbook,
vol.4, 2000)
It is usual practice to match the case depth with the intended application and base
material. As a rule, thin layers (15 to 20 µm) are used for protection against adhesive