As much as I would like this to be true, I think it's unlikely - Tachyons were first suggested in a scientific paper in 1967, while Tichy first appeared in Star Diaries in 1957, 10 years prior.

Wow, indeed. Lem is my favourite author and I read most of the books on him and his works and I am not sure I saw this. I will check if it is a well known fact but I doubt it is a coincidence.