Is it possible? Yes, others have done it. Can I guarantee that you will not have issues? No, you don't get guarantees with stuff like this. Some people have serious issues trying to integrate chicks or chickens of the same size and breed, it's not just with bantams or strange feathered birds. Silkies can be hard to sex, if one or both are cockerels that can add complications.
I don't know enough about your situation, size and number of coops, how your main coop is laid out, size and configuration of any runs, or your free ranging practices so it's hard to get too definite. Since you have so few chickens I have some concerns on how bit your main coop is. That may be your biggest hurdle. Silkies can't fly either so that might introduce some complications.
I suggest you follow the basics of integration. House them side by side so they get used to each other as you plan. If they can free range together you are way ahead of the game, let them. Provide separate eating and watering stations so there is no competition. Give them as much room as you can. Improve the quality of what room you have by giving them something they can hide under, behind, or over.
I prefer to not force them to get along. If the Silkies want to sleep separately at night, let them for at least a month and maybe more. Do not lock them in a tight space where they can't get away. As much as you can, let them decide how much they want to mingle. Don't be surprised if you have two separate flocks at least until the Silkies start to lay. Mine typically don't mingle that much and these are pullets hatched from the flock.
My situation is different from yours. My brooder is in the coop so my chicks basically grow up with the flock. When mine hit 5 weeks old I open the brooder door and let them mingle if I have plenty of room in the main coop. When the main coop is getting pretty crowded I move at least some to my grow-out coop where I keep them until they learn to sleep there, then let them roam with the flock during the day. After they have roamed together for a month I often move the pullets to the main coop but may leave the cockerels in the grow-out coop at night. It depends on how many I have compared to the room available. I have at least three and often four widely spaced separate feeding and watering locations. Sometimes I have over 50 chickens total, mostly young ones growing to butcher age.
I don't know if you can get anything out of this to help you. The main thing is to give hem as much room as you can and be patient. Good luck!
