BR is Barred Rock, right?
I would expect black chicks with white barring from the Australorps.
I would expect the same from the Barnevelders, but there is a chance of gold or silver leakage on those chicks as they grow up.
No, for at least two reasons:
--silver or gold will not be visible on black chicks with white barring. It might show up as leakage when the chicks grow up.
--silver rooster over gold hen makes silver chicks in both genders, so they cannot be sexed by color. That kind of sexlinks requires gold father, silver mother.